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Author Message   olered Posted on Monday, March 04, 2002 - 07:08 pm:    Sometimes while under acceleration, my 99d1 begins to make a vibration from the engine (i'm guessing). My engine will be running smoothly and then changes to (the only way to describe it) my engine rolling its "R"s. Anyone experience this. Your normal comments are welcome as well as helpful insight!   Anonymous Posted on Monday, March 04, 2002 - 07:47 pm:    Sticking valve(s)? Does this happen more often on steep grade and what's the mileage?   Eric N (Grnrvr) Posted on Monday, March 04, 2002 - 07:48 pm:    Does it happen at certain speeds consistantly? Do you have a lift on your truck? Do you feel this vibration in the seat and the steering wheel?   olered Posted on Tuesday, March 05, 2002 - 09:27 am:    It has 43k on the clock. It does it up and down hills. The truck is stock. It can be felt all over. I've had transmission probs with other cars before. I think this is an engine problem. After a while, it goes away and is silky smooth once again.   Eric N (Grnrvr) Posted on Tuesday, March 05, 2002 - 09:46 am:    Hmmm, different then what I have.. I just have vibes all the time now except at 70mph and over 80mph.. I haven giving up and I guess I'm just going to have to live with them.. Wish I knew what was causing it.. Driving me nuts.   Leslie N. Bright (Leslie) Posted on Tuesday, March 05, 2002 - 10:18 am:    Kinda sounds like what I'm trying to figure out. '99 4.0 D1 Disco, auto tranny. 79k on the odo. I'll be cruising along at highway speed, vehicle's gotten warm (say, 20, 25 minutes into the drive). Everything's fine. Not necessarily going up or down hill, quite often on a flat stretch, but sometimes this is more noticable on a long hill climb. It'll be smooth, then, subtly, it'll pick up a flutter. Nothing huge, a slight vibration.... reminiscent of a miss. It'll do it for 20 seconds or so. Other people riding along won't notice it if they're talking. It's a little rough. Giving it a little gas makes it a little rougher. Giving it enough gas to drop into 3rd, and she'll go ahead and do it, but the flutter becomes more pronounced. Let off the gas, and you don't notice it anymore. Get the throttle back to where you were, and it'll still be there though. Then, half a minute after it started, it goes away. Everything smooths back out, no more flutter. Won't do it again, until after you've turned it off, and let it sit and get cold. Then, it'll do it again, sometimes. It doesn't do it all the time, but often enough to make you wonder what it is. Sometimes, very rarely, it'll throw a check-engine light. But, when it does, it instantly starts behaving better. Then, after a couple of start-cycles, the light cuts off. Won't do it again, all seems well. Then, out of the blue, it'll start up again. Plug wires and plugs seem to be good, aren't old. I don't have a OBD-II scanner yet, it's next on my to-buy list. No dealers are anywhere within driving distance to get to to have them check it. I dunno. Maybe a TPS? Maybe a VSS? Something else? Wish I knew..... -L   Eric N (Grnrvr) Posted on Tuesday, March 05, 2002 - 10:39 am:    Mine is consistent.. I hit 45mph and it starts shaking the steering wheel and you can feel it in your seat a little.. Then goes away about 60mph and then when I get to about 75mph I get this load bass sound and more vibing till about 80mph and then it goes away and every thing is fine again.. Does this whether I have my foot on the gas or not.. The best part is that it does this with or without the front or rear drive shaft on the truck as I took them off one at a time to see what would happen.. I also took the drive shafts to a shop and had them checked.. I know many people running the same set up as me with no issues, I also know of one other person that is having the same 75mpn to 80mph issue as me.. I just can't figure it out..   Leslie N. Bright (Leslie) Posted on Tuesday, March 05, 2002 - 10:43 am:    Eric, Because it is speed-related, and not controlled by giving it gas or anything, I would strongly suggest that you have the balance checked on your tires. If they check out, then check for anything loose in your front end. That's what it sounds like to me, at least.... Hmmm.... -L   olered Posted on Tuesday, March 05, 2002 - 10:48 am:    Leslie, you have EXACTLY what I have! Thank the gods!!!! LR stated that they couldn't "recreate" the issue. It has new plug wires, etc. It happens to me once the dealership is closed so I can't go by and pick up a technician. Usually happens when running around 80mph, having to get off the gas (traffic reasons), and then back on it. It won't really accelerate either but it will maintain speed. Could this be our valves?   Leslie N. Bright (Leslie) Posted on Tuesday, March 05, 2002 - 10:55 am:    I dunno.... I run premium gas, and occasionally a cleaner, but it still happens. I've been wanting to try BG44K, but can't find it anywhere around here. Still looking, tho'... I'm hopin' it's something as simple as just changing out a VSS our something. I was supposed to call Nathan to discuss it, but the baby came, and I've ended up using up my calling card @ work, and when I'm home to call I'm too busy until it's too late to call. Once I get a new phone card (I'm a state employee, can't make long-distance calls on their dime) I'll give him a call, but anyone else who can pitch in any thoughts, please do. -L   Eric N (Grnrvr) Posted on Tuesday, March 05, 2002 - 10:57 am:    Leslie, I've had the tires done three times (all by different shops), every thing like the radius arms, trailing links, cross and tract rod, pan hard rod, every thing I could think to check, checks out OK.. I'm thinking of changing out the pan hard rod bushings just for the hell of it but, they aren't needed.. Even the pinion angels should be OK as most other rovers that I have looked at running DC shafts are farther out from zero then mine.. Is there any thing not drive line related that could cause this??   Andy Nix (Andy) Posted on Tuesday, March 05, 2002 - 11:22 am:    Are you sure the engine isn't cutting out ? Driveline vibes ?   Leslie N. Bright (Leslie) Posted on Tuesday, March 05, 2002 - 11:30 am:    Andy: Which, Eric or me and olered?? Engine doesn't cut out... just runs "a little" rough for less than a minute. olered, Yeah, it won't really accelerate, unless you either really give it a LOT of gas to get it to drop a gear, or else manually pull it into 3rd... Eric, Given all that you've checked, I'm at a loss.... Hmmm...... I'll mull it over, mabye think of something, but you've hit what I would have thought it might be, given your symptoms... Hmmm..... -L   olered Posted on Tuesday, March 05, 2002 - 11:37 am:    The engine doesn't cut out. The symtoms are the same as Leslie's.   Eric N (Grnrvr) Posted on Tuesday, March 05, 2002 - 11:42 am:    Ya, my engine isn't cutting out either.. Runs great actually.. I think that I'm just one of the lucky ones that got a couple of extra options that I really didn't want.. I always did like my drinks shaken not stirred... Well, at least the u-joints on the drive shafts are fine so at least I'm not worrying about having one fly off on me..   Rob Davison (Pokerob) Posted on Tuesday, March 05, 2002 - 12:25 pm:    i only had vib's for like 3 days.. it was the time i went wheeling with you eric. it would feel like i was driving on the rumble strip on the side of the road when i let off the gas around 50mph. (wasnt as bad as the rumbler strip, picture 1/4 tire on it) what you are describing sounds like wheel balance. or maybe even a steering issue. maybe you bent a rim or something wierd, like water inside the wheel. btw , my vib's went away for no reason when i got home. haven't come back in 6 months.. since then i added RTE rear arms and i think that was the root. rd   Rob Davison (Pokerob) Posted on Tuesday, March 05, 2002 - 12:26 pm:    leslie, sounds like you are not getting enough fuel to the engine.. maybe need a new fuel filter? rd   Leslie N. Bright (Leslie) Posted on Tuesday, March 05, 2002 - 12:28 pm:    Did it before and after changing the fuel filter last time.... Good thought, though.... Currently, I'm planning on locating BG44K and giving it a whirl, combined w/ replacing the fuel filter and spark plugs again (although they both should be okay). -L   WhoDatMatt Posted on Tuesday, March 05, 2002 - 12:36 pm:    Guys - I have the same problem, and what I don't like is that when I let off the gas, the vibes stop. Makes me think it's valves. I've tried resoline, etc. no help. Here's my question: when you guys jam it, I mean really floor it as fast as you can, do you notice all kinds of smoke coming out of your exhaust? And, instead of a $2500 valve job, wouldn't it make more sense to get a 4.6 dropped in? Thanks.   Leslie N. Bright (Leslie) Posted on Tuesday, March 05, 2002 - 12:39 pm:    Well, if a valve job was gonna cost me $2500, yes, I'd go w/ a motor. But, you can do better than $2500. I've not noticed any smoke at all. I regularly use Resoline, to no avail. Hmmm.................. -L   Eric N (Grnrvr) Posted on Tuesday, March 05, 2002 - 12:41 pm:    Well Rob, I haven't pulled the tires off the rims to look inside them yet so that is always a possibility.. I'm getting new tires as soon as GCR gets a shipment of rims in so we'll see if that helps at all.. I think that whatever is going on is going to be something that I will just have to live with..   olered Posted on Tuesday, March 05, 2002 - 12:52 pm:    I haven't noticed any smoke. Trying to locate BG44K now.   Rob Davison (Pokerob) Posted on Tuesday, March 05, 2002 - 12:52 pm:    yes!! when ever i need to get on my shit i see tons of smoke. i've asked others about it and no one noticed ! otherwise normal, though... rd   WhoDatMatt Posted on Tuesday, March 05, 2002 - 01:16 pm:    I think I'm f*cked worse than you guys. I've tried damn near everything. I think it's the valves. I haven't tried BG44k, but how different could that be than all these other products around? BTW, how much should a valve job cost?   Leslie N. Bright (Leslie) Posted on Tuesday, March 05, 2002 - 01:21 pm:    $2500. IF you go to a dealer. lol.... Nah, I dunno what a dealer would charge. Last time I did a valve job, I pulled the heads myself, took them to a local engine shop, then reinstalled them. Spent something like $150 total, on a 360 V8 (yes, it was a in a Cheap, lol)... If you don't do labor yourself, still, call around to some of the local automotive machine-shops wherever you are and see what they say. Let 'em know you're not wanting to break your piggie bank, and see if they can help ya out. Let 'em know that it's almost the same as the aluminum Buick V8 from the sixties, and the price should go down a bit... Good luck!! -L   Bill Bettridge (Billb) Posted on Tuesday, March 05, 2002 - 01:37 pm:    Eric, I had a vibe recently that was not my normal vibes and couldn't track it down. Finally when rebalancing a wheel I noticed a slight flat spot on the inner edge of one alloy. Took it to the local wheel straightener last weekend and after parting with $75 - all was well. Vibes went away and I could drive at 75-80 again. Funny thing was that the wheel balanced both before and after fixing the damage, but drivability changed considerably. This is probably a different issue than yours, but figured I'd throw it out there. Bill   Eric N (Grnrvr) Posted on Tuesday, March 05, 2002 - 01:54 pm:    I'll have to pull my wheels and check that out.. I didn't see anything wrong with them the last time that I looked execpt for a small chunk that a rock removed from the outer lip of a front alloy.   Yo!Adrian Posted on Tuesday, March 05, 2002 - 06:43 pm:    Leslie, you have described exactly what I had wrong w/ my '97. A valve job and $2038 later, she runs like a champ. I even attempted 2 bottles of BG44K, to no avail. Eric, not sure what you may have, since you have vibes with/without acceleration (?). Good luck. I did consider an upgraded engine, however, I needed by rig back in two days for a planned ski trip. Adrian   Eric N (Grnrvr) Posted on Tuesday, March 05, 2002 - 09:02 pm:    Let me ask this and see what you guys think.. With the lift that I have and the upward angle that my pinions are directed to cut down drive shaft vibes would it be possible that my gear oil in the pinions is not coating the gears enough? Would that cause vibe issues?   Kyle Posted on Tuesday, March 05, 2002 - 09:21 pm:    Um , I am going to ignore that...lol Did the vibes get better after the GBR shafts or worse ? And , this vibe only came with that 9 miles of lift right? Kyle   Eric N (Grnrvr) Posted on Tuesday, March 05, 2002 - 09:45 pm:    Vibes started at 2 inches of lift and have continued.. They were actually much worse at 2 inches then they are now.. The shafts did nothing to solve the problem and only made things worse until I took them to a local drive shaft shop and had them balanced.. But, even now I still got the same issue only it isn't as bad as before.. Why are you going to ignore that? How can I get more fluid in there? Jack one end of the car 3 feet in the air and then put diff oil in? The only other two things that I can think of are an A-arm extension in the rear to move the pinion up more due to when I had the rear shaft off getting balanced the truck drove much better except for when I hit 75-80mph then I still got that loud bass noise and vibe that sounds like it was coming from the rear or buy new shafts cause I already know that these weren't good from the start so maybe even though they were fixed they have so much weight on them that they are just still causing vibes.. I really don't want to drop another 900 bucks in drive shafts though.. I know that Brian had the same issue and bought new Tom Woods shafts so I sent him an email to see if they fixed his vibes but, I haven't heard anything back from him.. At this point I just don't know what to do..   Eric N (Grnrvr) Posted on Tuesday, March 05, 2002 - 09:52 pm:    I take that back, just heard from Brian and he is now vibe free with the Tom Woods shafts.. Oh well.. Looks like another 900 bucks out the window.. I really hate wasting that much money.. I wish someone had some spare ones that I could try and see if that fixes my issues before I go and waste another $900 on a long shot..   Kyle Posted on Tuesday, March 05, 2002 - 09:52 pm:    Well feed back from Brian is not gonna tell ya much. There are tons of people that say they are vibe free and then later ya find out they are fighting the same issue. Your trucks geometry is off. It was designed to be the height it started. The diff oil is and isnt an issue. I dont think its playing into your vibe issue but it will surely reduce the life of the outter pinion bearing. Why not try this little experiment. Remove one shaft at a time. I am betting that if the truck only has one shaft in it (Front or rear) it wont have that vibe any longer...There is something with the two shafts being live that is causing it. I am almost sure thats why they are so damn sensitive. Kyle   Eric N (Grnrvr) Posted on Tuesday, March 05, 2002 - 10:06 pm:    I have already done that.. With the front one off while getting it balanced the truck felt pretty good except for that 75-80 mph bass noise with vibe.. Got the front one back and took the rear one off and truck felt good but, still got the 75-80 mph bass noise and vibe.. But nothing with either at 45-55 mph.. Got the rear one back and now with both of them the 45-55mph vibe (felt in steering wheel and seat) and the 75-80 mph bass noise and vibe are back again.. So it is with both.. The diff angles shouldn't be an issue cause they are much closer to being perfect then other peoples are.. JBS even made me a custom set of arms to raise the front pinion so that it is at a much better angle for a DC shaft.. You should see the weights on these shafts though.. Could it be that the shafts needed so much weight to balance out that they are causing the trans case to vibe? I mean the guy had to put 6 of the thick weights on the top of the shaft and another 2 at the bottom just to get them balanced..   Kyle Posted on Tuesday, March 05, 2002 - 10:19 pm:    I have a few theories actually. One is that just because the shafts are balanced seperately doesnt mean that they are when you join them together. By joining them together I mean bolting them to the tcase. When you bolt them to the T case they then form one long shaft running from the back of the truck to the front the T case being the coupler. Yes I know this sounds silly but almost everyone drops the vibes when they drop one shaft (Doesnt matter which shaft). The other theory is angle at the T case. Since it is essentially one long shaft when you bolt them to the t case , the angles front and rear on the DC come into play. They then need to cancel each other out as well. Thats why I was getting you to raise the ass. I have had some success with doing that on the one truck here. Heathers truck has both factory stock Drive shafts in it and is litterally Vibration free with 3" of lift. No fancy arms , no fancy shafts , just bone stock Rotoflex and all.. I have a new transfer case here and I am searching for just the right shaft for the front of my truck now before I put it in. Not sure if I am going Disco2 front shaft or what but this thing is driving me nuts. I have made plenty of driveshafts over the years and just bolted them into pickup trucks , cars , whatever and never had this kind of dumb shit going on.... Kyle   Eric N (Grnrvr) Posted on Tuesday, March 05, 2002 - 10:32 pm:    I'll call the local guy tomorrow and talk to him and see if he can balance both at the same time.. That ought to get him laughing.. The rear of the truck is up higher then the front.. I put the plastic factory spring shims back in the rear so that car sits leaning forward a little.. It actually helped a little.. But I think that was more due to the springs weren't rubbing on the perch any more.. The truck is really going to be leaning forward when I hang that bumper and winch off the front.. Another thing is to put bigger tires on it so that the speed of the shafts slow down.. Shafts don't spin as fast with bigger tires and stock gearing which makes the angles less of a factor.. Not really a fix to the issue but, I think that is why most people don't have as many vibe issues is cause as soon as they lift they put on bigger tires.. I didn't. Mine are actually a little smaller then the stock ones which causes my shafts to spin even faster to get up to speed. Could be part of my issue right there.. Also you are regeared and I don't think that she is.. Is she?   Kyle Posted on Tuesday, March 05, 2002 - 10:38 pm:    Eric , you know we are all stock accept for a few springs here and there... Kyle   Kyle Posted on Tuesday, March 05, 2002 - 10:39 pm:    I am also thinking that steel adapter is some of the issue. You may want to weigh the things and ask Dobbs at GCR what his weigh. If his are lighter it might be worth the investment to test it out. Seems the shafts with aluminum spacers have less vibes... But I dont care for the aluminum there... Kyle   Eric N (Grnrvr) Posted on Tuesday, March 05, 2002 - 10:48 pm:    That's what I'm wondering also is if the adapters are not perfect when the shaft gets balanced on a big heavy piece of equipment every thing is fine. Then when you spin them on a t-case they aren't so fine..   Kyle Posted on Tuesday, March 05, 2002 - 10:50 pm:    John has the adapters made , or did anyway. Ask him how they fare as far as consistency... Kyle   Eric N (Grnrvr) Posted on Tuesday, March 05, 2002 - 10:51 pm:    Maybe I'll see if I can get someone to make me some new adapters and see if that helps.. Those puppies are heavy.. I know I talked to John as he has been helping me try to get this issue resolved.. I was going to ask him to make me some if he still can and then take the shafts in and have them re-balanced and see what happens..   Eric N (Grnrvr) Posted on Tuesday, March 05, 2002 - 10:55 pm:    I would rather try to fix what I already got then go and buy all new shafts and still have the same issues.. Oh well.. Till tomorrow.. P.S. My truck is all stock too   Rob Davison (Pokerob) Posted on Tuesday, March 05, 2002 - 11:21 pm:    what about wheel bearings and shit like that? maybe it's something completely unrelated to the shafts... thinking outside the box for a moment rd   niall forbes (Forbesn) Posted on Tuesday, March 05, 2002 - 11:43 pm:    Could it be related to output shaft bearings or anything like that? It really sounds like bad tires, like they're scalloped or something. That can make an awful racket and vibration. Have you moved them around? A cheap solution might be a new stereo. No seriously, prices are coming way down and if you had enough bass and listed to the right music loud enough, I'll bet you wouldn't even notice the vibration anymore ;-) Niall Forbes 66 IIa 88SW - The Red Zit <-- For Sale http://www3.ns.sympatico.ca/forbes/forsale.htm   Ron Posted on Wednesday, March 06, 2002 - 12:32 am:    Leslie and the others with let off the throttle vibes. It is most likey valves. It they are not too far gone (ie bent) you can run top engine cleaner through it. GM makes a good product. It could also be the VSS but when I have had VSS issue the throttle did not help much when applied. Eric, You obviously have some issues that need to be figured out rather than throwing money at it. first thing I would do is take off the radius arms and go back to stock there (pull the front shaft and see if it goes away first though) Any number of things could be vibing. Front dif, rear dif, center dif (all of which suck and have a tendency to wear) Then look at all the bearings involved, you could potentially have issues in the preload on either pinion or even the T-case preload. Now in the driveshafts they could be out of balance or you could even have wear in the splines or they could be bent. Finally a couple other things to throw at you. One particularly bad vibe I saw turned out to be a cv on its way out. BUT if I had to put my money on one of these things I would bet that your front DS angles are messed up at the front dif due to the castror corrected arms coupled with the CV shaft. Ron   Ron Posted on Wednesday, March 06, 2002 - 12:34 am:    Even a cheap bastard valve job is going to set you back a couple grand. Also hope that your head(s) are not warped like one of ours was. $$$$ Ron   Kyle Posted on Wednesday, March 06, 2002 - 08:41 am:    Perhaps you didnt read all the posts Ron.... Kyle   John Posted on Wednesday, March 06, 2002 - 10:59 am:    Eric, you may try for curiosity re-locting the front rear link bushing to the front side of the frame mount. That would rotate your pinion up just enough to give you the optimum pinion/drive shaft angle in your case to see what you may learn. I wouldnt leave it there permanantly but it may give you a clue as to the rear pinion angle. Its just 3 bolts in a triangular pattern.   Blue (Bluegill) Posted on Wednesday, March 06, 2002 - 11:25 am:    Kyle makes sense - when I drop front shaft, all is smooth as glass; drop rear shaft (roto), all is well; both stock shafts onboard = slight vibration & shimmy at 75+. Other than playing with dropping shafts, I can't actually pinpoint that it's simply vibrations from drivetrain (as opposed to "the bitch is just shakin at speed"), so I'm off to balance wheels this weekend and then explore other possible culprits (bearings, bushings, valves, cv, just keep it below 75, etc). Did Jackson lose his keyboard? What's the deal with his Wood's shafts? Sounds like positive results........ Oh, and Kyle...what lifespan are you seein in Heather's roto with the lift?   Eric N (Grnrvr) Posted on Wednesday, March 06, 2002 - 11:38 am:    I'll try that this weekend John and see if that does anything. Thanks. I didn't even think about doing that.. I also noticed that my tread on the inside edge of my front tires was worn irregularly.. I put more air in them to get them to ride on the inside tread and it seemed like it got a little better but, now instead of the bass noise with vibe at 75mph I get it at 70mph.. I'm going to put the max pressure in them after work and see if that makes any difference.. I also talked to the drive shaft guy this morning and he told me that the amount of weights on it wouldn't make a difference since they balanced out and that he balanced them starting at 1600 rpm and them up to 3000 rpm.. Not sure what that comes out to in MPH though..   Eric N (Grnrvr) Posted on Wednesday, March 06, 2002 - 11:45 am:    Also, how can I get more fluid into the diffs since the fill hole is now a little lower then it used to be since the pinion is angled up more.. I don't think that I have a jack tall enough for that.. Also, Ron I'm not that mechanically inclined to be able to check my own pre-load and that sort of thing and the dealer will charge me some good money for that.. However, now that I think about it the dealer did change out my rear pinion seal a little after the 2 inch lift.. I still had vibe before they did it but, maybe they put it back together wrong?   Blue (Bluegill) Posted on Wednesday, March 06, 2002 - 12:17 pm:    >"I put more air in them to get them to ride on the inside tread and it seemed like it got a little better but, now instead of the bass noise with vibe at 75mph I get it at 70mph.. I'm going to put the max pressure in them after work and see if that makes any difference.." that's another weird disco thing - I've never had a vehicle as sensitive to tire pressures as this disco - definitely affects vibes as well as ride quality >"Also, how can I get more fluid into the diffs since the fill hole is now a little lower then it used to be since the pinion is angled up more.. I don't think that I have a jack tall enough for that.. think outside the garage...take some gear oil with you to the trail this weekend and dive the nose into a ditch...   Eric N (Grnrvr) Posted on Wednesday, March 06, 2002 - 12:24 pm:    garage?? I got a drive way.. I wish I had a garage as then I wouldn't be freezing my butt off every time I want to tinker with the truck..   Leslie N. Bright (Leslie) Posted on Wednesday, March 06, 2002 - 12:32 pm:    Ron, "It is most likey valves. It they are not too far gone (ie bent) you can run top engine cleaner through it. GM makes a good product. It could also be the VSS but when I have had VSS issue the throttle did not help much when applied. " I don't think a valve is bent (yet), because it is usually smooth, w/o any problems. It's really not a let-off the throttle vibe, it's a cruising along, then start to vib, kinda thing. And, the throttle doesn't help when applied, either.... it's more noticable w/ more throttle applied; letting off the gas pedal, you don't feel it anymore. I'm suspecting, actually, that it's a combination of both, maybe a little bit of dirty valves, and maybe a VSS starting to go.... Back a month ago, we had a freezing rain, and the wife went driving in the Disco to the store. Got home, and asked why the speedo wasn't working... it had been when I drove home. The next day going to work, the speedo would start to work, then quit. Again and again. On my way home from work, it worked fine, and has since. Odd, eh? I dunno.... top cleaner's bumped to the top of the to-do list, and will probably get a VSS in route to me before long, too..... -L   Blue (Bluegill) Posted on Wednesday, March 06, 2002 - 12:33 pm:    LOL - I couldn't wait for a garage, but my "new" 1961 garage barely lets me jack up the ass end of my Disco before I hit the ceiling. I have a grand total of 2" of clearance between my "stock" Disco and the garage door header, so anything resembling a roof rack means no mo garage for me...   Ron Posted on Wednesday, March 06, 2002 - 04:24 pm:    Ya kyle I read them all, just tried to list all the possibles. Ron   Eric N (Grnrvr) Posted on Wednesday, March 06, 2002 - 04:41 pm:    Think I have some things to figure out... No shit.. Thanks Ron..   Brad Bradford (Brad) Posted on Wednesday, March 06, 2002 - 05:23 pm:    Eric, I have had the exact same problems with my truck. I have a 2" lift, and have had vibrations. I pulled the front shaft, and then the rear shaft. I don't have a clue. I recently (yesterday) replaced the front u-joints, this took away a little bit of vibration, but there is still that rumble from about 65-75mph. I have replaced all engine and transmission mounts. I also put a set of new tires, and had wheels balanced and aligned. I guess it is just luck of the draw. By the way is yours a 5-Speed?   Eric N (Grnrvr) Posted on Wednesday, March 06, 2002 - 05:26 pm:    Nope. Mine is an auto.   Brad Bradford (Brad) Posted on Wednesday, March 06, 2002 - 05:28 pm:    I thought it could have been some 5-Speed quirk   Eric N (Grnrvr) Posted on Wednesday, March 06, 2002 - 05:30 pm:    Don't take this the wrong way but, I wish it was.. Then I wouldn't have this problem   Ron Posted on Wednesday, March 06, 2002 - 08:17 pm:    Eric I was just kinda saying don't throw money at it until you figure it out. for $900 I would put lockers in and see if that helps before doing the shafts. If you want a fresh set of eyes or two on the problem maybe you can drive up to Tom B's for a shop day (Del./PA border). You would be amazed at what 2 or three people can figure out. Best part is it would be way cheaper than the dealer (we work for lunch) Leslie, based on your description replace the VSS. No speedo and it does not respond to throttle points to VSS. Wierd as it sounds valves and VSS feel similar. Although a top engine cleaner is money well spent. Ron   Kyle Posted on Wednesday, March 06, 2002 - 09:26 pm:    Lockers ? How many trucks have lockers of every differnt flavor and still have the same vibe ? All a bunch of eyes are gonna do is send him in more fruitless directions... Also Eric , the guy at the drive shaft shop is smoking crack. Something can be out and balance up just fine. That dont mean that its gonna work right at all and you aint gonna feel it at all sitting in the drivers seat.. Kyle   Ron Posted on Wednesday, March 06, 2002 - 10:17 pm:    My point was he had about as good of a chance fixing it with lockers as he does with new shafts so if he feels like throwing money at it buy some f'in lockers which will gauarantee it is not in the diffs. You could say the same thing about DSs. How many people with cv DSs still have a vibe. Correct me if I am wrong but Eric had this vibe before and after the CV drive shafts. Anyway, my suggestion stands, the point of having other people look at it is that people with experience with this stuff will be able to pull the shafts and check them with all sorts of good stuff, and will also be able to check the output bearings on the T-case and at least give a cursory inspection of the diff bearings and everything else. Ron   Kyle Posted on Wednesday, March 06, 2002 - 10:23 pm:    lol , I believe John has taken a peek at it at some point.... All the looking in the world aint gonna fix it.... And pinion angle gos out the window once he loses the vibe by pulling each shaft one at a time... The problem comes when you connect those shafts... Its pretty narrowed down at that point... Kyle   Ron Posted on Wednesday, March 06, 2002 - 11:00 pm:    So he has a vibe only when both shafts are connected. No vibe with either one missing? Is this correct? Ron   Ron Posted on Wednesday, March 06, 2002 - 11:06 pm:    Just went back and looked: "The best part is that it does this with or without the front or rear drive shaft on the truck as I took them off one at a time to see what would happen." So it vibes no matter what. Now I see why you asked me if I read them all I guess I forgot from one day to the next But this started AFTER a lift. hummm, what about allignment. if he has this thing lifted to the moon and is out of allignment (did I see a mention of abnormal tire wear) it could be possible too. did you ever check the toe in and recenter the steering wheel? Ron   Eric N (Grnrvr) Posted on Thursday, March 07, 2002 - 10:32 am:    Yes, I re-did the allignment.. It is fine.. I have it set at 1/16th toe out.. Well at least in the drive way measuring tape sort of way.. I had the tires aired down a little more then ussual as before I had the shafts re-balanced letting a little air out of the tires helped dampen the road a little so that I could feel the vibes better.. Also, with the front or rear shaft off my 40-50mph vibe that I could feel in the steering wheel and my butt would go away.. However, the really load bass noise and vibe that starts at 70-80mph never went away.. I would be willing to drive up there and let you guys look at it.. When is this?   Eric N (Grnrvr) Posted on Thursday, March 07, 2002 - 10:34 am:    Oh, and I've been driving it like this for a while now and the U joints are in great shape.. I'm not looking to buy new shafts I would rather fix these.. Or figure out what is really messed up and fix that.. I am getting new tires soon though so if it is the tires I'll find out then I guess..   olered Posted on Friday, March 15, 2002 - 09:15 am:    I spoke with a service manager yesterday concerning the vibration. I explained to him what I was experiencing and he said that he had the same thing. I told him that I thought it was a valve issue and he agreed. He said that LR would only repair the valve issue under warranty if a dash light came on and then only with the proper code. What a rip! I'm going to have a bad problem the day 50,001 miles hits.   Mike J. (Mudd) Posted on Friday, March 15, 2002 - 10:21 am:    Eric, Do you have rear links made for the lift? That's my next attack (this weekend)on the same vibe issue. Mike J.   Eric N (Grnrvr) Posted on Friday, March 15, 2002 - 10:25 am:    Yes, I'm running the Rovertym rear links with no spacers on them..