| Author | Message | ||
     Matthew Gibson (Mattgibson) Member Username: Mattgibson Post Number: 80 Registered: 06-2003 |
My Disco now has 185,000 miles on it. It has developed a minor "driveline" vibration at low speeds which only gets worse as speed increases. At 70mph, It'll shake all the fizz out of my coke! -Tires were just balanced- not that. -Flex disc repalced 40,000 miles ago- shows no wear or splits, but I have ordered a conversion kit anyway. -Last suspect is the u-joints, which I will replace in a couple a days, but they seem to be in good shape and no play in them. If they are worn out but still tight, shouldn't they get hot after a good drive? -Shocks repaced about 10K ago, don't suspect them. Any suggestions? (If I could only get this thing to vibrate when parked...  | ||
| Joey (Joey4420) Member Username: Joey4420 Post Number: 207 Registered: 04-2003 |
You say driveline, and you have replaced or are going to replace alot of things. Do you feel this vibration in the steering, if so have you changed out your steering stabilizer? I beleive I read somewhere that you can get vibration from the preload on your swivels as well. If you do any off roading, you may also want to check for dents, dings, or mud on your driveshafts, this will cause vibration easily. I am sure that someone else has other thoughts or contridictions to mine. | ||
| Leslie N. Bright (Leslie) Dweb Lounge Member Username: Leslie Post Number: 2501 Registered: 02-2002 |
A) Check your rotoflex. (Or have you converted to u-joints?) B) Is there a noise associated with it? If so, consider checking wheel bearings. C) Any fluid leaks from around the diffs, near the driveshaft input? Maybe a pinion bearing. FWIW.... -L | ||
| Dave (Plain2000dii) Member Username: Plain2000dii Post Number: 67 Registered: 05-2003 |
I've got a vibration as well, I believe from lurking here it most likely the rotoflex coupling. Where do I get a "u joint conversion"? Or is it satisfactory to put in a new rotoflex? mostly always highway driven....:-( | ||
| Mike Rupp (Mike_rupp) Senior Member Username: Mike_rupp Post Number: 270 Registered: 02-2002 |
Dave, do you have a suspension lift? After I installed the OME lift the rotoflex would only last about 10K miles. Being driven on the road will still keep the rotoflex at more of an angle than before the lift and wear them out quickly. If you don't have a lift, I'd just get a new rotoflex. If you want to get a ujoint conversion you have a couple of options: 1. get a used driveshaft from an older Range Rover or ujointed Discovery and get all of the other parts (pinion flange, nut, spacer, bolts) or 2. Call Bill at Great Basin Rovers and get a new driveshaft. | ||
| Matthew Gibson (Mattgibson) Member Username: Mattgibson Post Number: 81 Registered: 06-2003 |
Sorry about taking a while to get back! Vibration isn't in steering- new stabilizer. There is no noise either. Just plain vibration. Engine runs smoothly at idle. I had the guys run a coolant test to see if any exaust gases had been getting into the system- none yet.(at this mileage, I'm pleasantly suprised!) Swivel pre-load? So you're telling me my Rover might GO OFF??!!(just kidding) Hadn't thought of that. I hope it isn't the bearings. I've never tried doing a rotor or bearing job before- always been afraid that I'd do something wrong and set the "self-destruct" sequence into motion. -Matthew G. | ||
| Brian Dickens (Bri) Senior Member Username: Bri Post Number: 694 Registered: 08-2002 |
I had my rear shaft balanced and much of my vibes went away. I will do the front now since the remaining vibes above 70 MPH seem to be up front. | ||
| Brian Friend (Brianfriend) Senior Member Username: Brianfriend Post Number: 1155 Registered: 09-2002 |
Speaking of vibes, I've got one and I am a bit confused. It is DEFINATLY in the rear. After removing the rear drive shaft I have no vibes or noise. I just installed a new used ds and the vibe is back and a whine. Probably my lift has a lot to do with it so I am going to take the 1" spacers out taking me back to 3" and see if the vibes and whine go away. Main questoin now is it possible to install a REAR ds wrong? And if not, what can I do to releive the rear drive shaft angles? | ||
| Edward Bibb (Heirless) New Member Username: Heirless Post Number: 22 Registered: 04-2003 |
check with Great Basin Rovers, it sounds like you need a double cardin front shaft. Have you lifted your rover? | ||
| Mike Rupp (Mike_rupp) Senior Member Username: Mike_rupp Post Number: 271 Registered: 02-2002 |
Brian, did you have vibes before the install? what was on there before the install? Rotoflex driveshaft? It could be something as simple as bad ujoints or an out of balance driveshaft. When I bought my used driveshaft I took it to a driveline shop to swap out the ujoints. They called back saying that the driveshaft was bent which made it out of balance. It was hard to see unless your specifically looking for straightness. | ||
| Brian Friend (Brianfriend) Senior Member Username: Brianfriend Post Number: 1156 Registered: 09-2002 |
Mike, No rotoflex. Before the new ds I had vibes similar to this and it rounded out the yokes where the u-joints attach. I assumed the problem was from whacking the ds on so many rocks but the vibe problem didn't really start untill after I went from 2" ome to 4-maybe 4.5". That is why I think it is probably the angle. I didn't think of the new shaft being bent, I will investigate that. Were they able to ballance the bent shaft in your case? | ||
| Mike Rupp (Mike_rupp) Senior Member Username: Mike_rupp Post Number: 272 Registered: 02-2002 |
Brian, they weren't ablt to fix the drive shaft, they said it had to be resleeved, which cost about $100. That was about the price I paid for the driveshaft & associated stuff for the rotoflex conversion. I was able to get a new driveshaft instead of having to resleeve. I have a feeling that you'll need to mess around with the pinion angle to get eliminate the vibes. As far as the angle goes, you should be able to run a 4" lift with a conventional ujoint driveshaft as long as you get the pinion angle parallel with the transfer case output shaft. Keep in mind that the ujoints will wear out faster than before the 4" lift. | ||
| Brian Dickens (Bri) Senior Member Username: Bri Post Number: 699 Registered: 08-2002 |
Mike, how to adjust the pinion angle? Brian, did you balance yolur drive shaft. If made a huge difference on mine and costs all of about $8. I am going to do my front one as well. What type of DS did you end up with? | ||
| Brian Friend (Brianfriend) Senior Member Username: Brianfriend Post Number: 1157 Registered: 09-2002 |
Ever hear of anyone using a shim to correct the ange on the rear ds? | ||
| Brian Dickens (Bri) Senior Member Username: Bri Post Number: 701 Registered: 08-2002 |
I have not, have you? The only thing I know about is: http://www.rovertym.com/aarm.htm I would really go get both DS balanced before you spend any other cash. I'd be a shame for it to merely be balance and head down some other path. | ||
| Brian Friend (Brianfriend) Senior Member Username: Brianfriend Post Number: 1158 Registered: 09-2002 |
Brian, who did you use for your ballancing? | ||
| Mike Rupp (Mike_rupp) Senior Member Username: Mike_rupp Post Number: 273 Registered: 02-2002 |
The RTE trailing links have spacers that can lengthen the trailing arms, which will lower the pinion. | ||
| Matthew Gibson (Mattgibson) Member Username: Mattgibson Post Number: 82 Registered: 06-2003 |
Just to ask, can the u-joint be installed out of alignment on a rotoflex driveshaft? That is to say, could the front part of the driveshaft (that slides in and out) been put back into the rear part out of line- maybe a spline or two off? Or does it matter? Is there a way to check? -Matthew G. | ||
| Brian Friend (Brianfriend) Senior Member Username: Brianfriend Post Number: 1161 Registered: 09-2002 |
Well, i solved most of my vibe problem. I still get one up to 35mph but then it goes away. I phased the rear shaft and I rotated the rear "coupling" 180. I don't know wich of these helped the problem but I am happy with the results so far. I do have broken motor mounts so the low speed vibe might be corrected by that. Mathew....I am interested in the answer to your q also. And does anyone know if the rear DS should be phased or not? | ||
| Matthew Gibson (Mattgibson) Member Username: Mattgibson Post Number: 84 Registered: 06-2003 |
Ah, I found the problem- a failing motor mount! Always check eveything but something you wouldn't suspect. Brian- my answer to your question(which may NOT be correct and take with grain of salt): I took my rear driveshaft off anyway and replaced the U-joints and separated the DS, cleaned, greased and replaced. It seems that the DS will only go back together one way- it may be "keyed." Hope that might help. Always mark the way it comes apart anyway. -Matthew G. | ||
| Brian Friend (Brianfriend) Senior Member Username: Brianfriend Post Number: 1163 Registered: 09-2002 |
Hehe....Mathew...you are right about the DS only going together one way. I tried to phase mine and I was able to get the thing back on the truck but in order to get it "phased" I had to kind of Pound on it. (note to self...if it slides apart easy it should slide back together easy) I discovered my slow speed vibe. The slip joint was not slipping. I got that thing cramed in there so good that it might as well have been welded together. After taking it off again I had to strap the DS to a tree useing a tree strap and strap the other end to my winch and pull the thing apart. Amazingly enough when I un-phased it it slid right back on. It is not always fun to do things over 3 or 4 times. Anyway...I put the thing back on and more of the vibes are gone but I still have a whine in the rear diff. Still working on this problem. |
