| Author | Message | ||
     Perry Ray Miller (Discojunky) New Member Username: Discojunky Post Number: 37 Registered: 03-2003 |
Good news is I just installed a detroit locker and a tru trac with 4.11 gears. The 3rds came already set up all I did was swap em' out. What I am wondering is how much noise is normal for this set up? You can hear the whine of the gears pretty loud compared to none before. Will they break in? Is it because they are taller? I put in 90w dinosuar oil to break em' in. (Thanks to advice I got here). Any help? | ||
| Will Cupp (W_cupp) Senior Member Username: W_cupp Post Number: 257 Registered: 07-2003 |
What does taller mean? I noticed no increase inn noise after my install. I do notic the detriot make a bang from time to time and a clicking when making turns and such. Gear noise, I don't know. Maybe it's the 4.11 gears in the diff making the transmission wine louder, I don't know. | ||
| Perry Ray Miller (Discojunky) New Member Username: Discojunky Post Number: 38 Registered: 03-2003 |
Sorry, I guess "taller" is slang for increasing the gear ratio. I do hear the noises from the Detriot but I expected those. But the gears sound like some cars when in reverse. You know, that louder wine sound. I think reverse in most cars is a higer gear ratio so maybe that is normal? I will contact the vendor but the person I need to talk to is on vacation until 1/7/04. Thanks | ||
| Kyle Van Tassel (Kyle) Moderator Username: Kyle Post Number: 471 Registered: 11-2002 |
What kind of speeds are we talking about here ? Since you use the term "Taller" I am going to assume (Yeah I know , I have been called worse) that you know a little about gears in general. Just to reiterate it though. Everything is spinning faster then it was before and it will generate more noise. It will also amplify an issue that might have been there before. I could also very well be a bad setup. Kyle "Blow me" | ||
| marc olivares (Pugs) Senior Member Username: Pugs Post Number: 280 Registered: 12-2002 |
there will be a noticeable noise increase when changing to a 4.10/4.11 gear set. and the noise will decrease very slightly once worn in. but an incorrect set-up will also create quite a bit of noise too. like kyle suggests, when does the noise occur (drive, coast, acceleration, deceleration) if the noise you hear is constant, you're hearing the gear set, if it varies then it's the set-up. if these are GBR's gears (as bill is currently on vacation) chances are the set-up is dead on (Bills tech is a SLC gear wizzard!) i also have the a similar noise but it comes from the transfer case. these gear sets tend to make the transfer case noise resonate more. marc | ||
| Perry Ray Miller (Discojunky) New Member Username: Discojunky Post Number: 40 Registered: 03-2003 |
The noise is low and constant but increases when you let off the throttle at pretty much all speeds. They are GBR's which I did'nt want to say incase its a false alarm or normal( Bill has been great and I don't want to give him a bad wrap) but I also hate to wait til' the 7th. I am strarting to feel like it is just the difference in the gearing. It does seem to be coming from the rear (the Detriot) though and not from the front (the tru trac). | ||
| marc olivares (Pugs) Senior Member Username: Pugs Post Number: 284 Registered: 12-2002 |
perry, again, it's pretty rare that Bill ships out a 3rd member with a bad set-up. not to say that that's not it. but keep in mind that by design most of the noise will resonate though the shifting console. to verify, have someone else drive your vehicle while you sit in back to listen. by your description, it sounds to me like a normal 4.10 gear set. and again like Kyle stated earlier "everything is spinning faster". marc | ||
| Kyle Van Tassel (Kyle) Moderator Username: Kyle Post Number: 473 Registered: 11-2002 |
If it is indeed the rear diff making the noise then I gotta say its a bad setup. It happens... Kyle "Blow me" | ||
| Barry (Barry) New Member Username: Barry Post Number: 28 Registered: 02-2003 |
Perry, I was really going to hold back on posting this topic for another 400 miles, but you are right on with your description. My 2000 DSII now has the GBR complete 3rds with 4:11, Truetracs f/r, HD GBR rear drive shaft(no more rotoflex), and GBR HD rear halfshafts. I have read many discussions about the inevitable increase in gear whine associated with changing out the factory R & P. That's exactly why I spent the $$$ to have complete 3rds built in hope of the best possible results. Yes, I did expect more noise, even though Bill said "you really shouldn't hear much more noise than the stock set-up". 600 miles later, the "significant" increase in drivetrain noise is still there. I'm more concerned with the abrupt grinding metal screech that happened twice last week during some off-road Traction Control situations. I don't recall my last rig with a rear Truetrac making any noise. -Barry | ||
| Frank Rafka (Mongosd2) Dweb Lounge Member Username: Mongosd2 Post Number: 236 Registered: 02-2003 |
Two comments... Perry, sounds like a bad set-up... Barry, you DEFITENTLY have a problem! Did the grinding come from the front or rear? I've had TT's F/R w/4.11's for over 2 years, and 40k and I never heard any increase in noise or grinding... Frank | ||
| Joe M. (Little_joe) Senior Member Username: Little_joe Post Number: 284 Registered: 11-2002 |
It's important you follow proper break-in procedures for gears - hopefully the vendor explained this to you. There is a cycle to follow, typically driving for specific distances, letting them cool down, then change the gear oil. Randy's Ring and Pinion has good info on their page. The Detroit and TT should not make any noise (aside from the occasional bang of the Detroit). joe | ||
| Barry (Barry) New Member Username: Barry Post Number: 29 Registered: 02-2003 |
Frank, The abrupt sharp grinding could have resonated from either end. It happened quickly and caught me by surprise both times. I thought there might be some sizable metal piece(s) causing further damage so I drained both diffs yesterday. After 600 miles, the rear oil was darker than new in color with similar viscosity to new oil. No sizable metal pieces caught in screen attached over catch pan. Finger probe found only a few "nail clipping" size metal shavings remaining inside bottom of diff. The magnetic plug had accumulated a 1/2" thick paste-like beard of metallic shavings. The front fluid was definitely thicker with a dark metallic gray sheen. That magnetic plug also had about a 1/2" of shavings. Joe, Apparently the vendor did not explain proper break-in procedures. I now have new mineral oil in both differentials, and for what it's worth will start the break-in process again. -Barry | ||
| Greg Davis (Gregdavis) Senior Member Username: Gregdavis Post Number: 1107 Registered: 08-2002 |
For what it's worth, when I recently went to the 4.75 gears, there was very little increase in gear noise. | ||
| Sergei Rodionov (Uzbad) Member Username: Uzbad Post Number: 236 Registered: 08-2003 |
Barry - grinding noise might be result of driveshafts/flanges not fitted properly. Try to shake driveshaft - if there is any noticeable play, its probably result of flange not tightened fully - thus pinion able to move a bit as damn thing has outer bearings kept pretty much by pressing flange + spacer against it. Just as Greg, i recently upgraded to 4.7 gears with rear ARB and there is no significant noise increase (in fact my wife convinced its a bit more silent that with stock). However i didnt use GBR for that so i i couldnt comment on how much noise their setup will produce. Then again i am mere newbie  | ||
| Sean Arney (Seana) Dweb Lounge Member Username: Seana Post Number: 88 Registered: 05-2003 |
Gotta go along with the no noise crew - I have gears, detroit in the back and tt up front - narry a sound from them. I got gears and lockers from Bill, but not preset. They all came in box, but there's no noise. |
