Rearend aficionados
Thread Starter
Racer
Joined: Sep 2000
Posts: 485
Likes: 1
From: Dallas Texas
Rearend aficionados
I have the rearend out of my car along with everything else. I was getting ready to put the new cover on and thought I would "prelube" it a bit before I buttoned it up. As I was rotating the gears I noticed I got a little bind or stick as the closed end of the posi came round to the pinion gear. As I increased the speed of rotation the stick or bind was not really noticeable. I was wondering if this is normal. There seems to be no metal to metal contact just a slight stick. I might add, while I was changing the cover I took out the carrier and yokes and cleaned everything up and replaced the yoke bearings and posi carrier bearings and races. I did not mess with the pinion bearings as I did not want to deal with the preload and such. I know those are good or were as I had some work done on it previoulsy. I hope that I did not change the setup by changing out to new bearings. At the time I did not see that it would matter but you know hindsight..... I would appreciate any input.
Thanks
Thanks
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
Re: Rearend aficionados (DVG73)
You will not mess up the pinion depth because you did not change these bearings. Side to side may have changed slightly due to tolerance of the bearings. You need to check the gear lash. This is the back and forth motion of the ring gear while the pinion stays in the same location. It should be .005 to .008. You need to mount a dial indicator on the housing and have the movement of the indicator in line to the gear movement. Hold the pinion steady and move the ring gear back and forth. It should be .005 to .008. If it is more or less you will need to shim the side bearings. This is important to do. To tight and you will create lots of heat and ruin the gears. To loose and there will be slop in the drivetrain. :D
[Modified by Gordonm, 4:11 PM 8/22/2001]
[Modified by Gordonm, 4:11 PM 8/22/2001]
Advanced
Joined: Jan 2001
Posts: 92
Likes: 0
From: St. Louis, Missouri USA
Re: Rearend aficionados (Gordonm)
Hey,
You have moved the backlash setting by installing the carrier bearings and races as gordonm has mentioned, the the he didn't say was , the wear pattern was already set in the ring and pinion. There is a good chance that you will have a cruise or decel whine if the backlash setting is not back where it was with the old bearings. It could be very minor or maybe no noise at all... but there is a chance. Gordonm is correct on the backlash setting .005-.008 , I set mine up a little on the tight side .003-.005, as long as it is not over .010 you should be fine.
Hope everything works out.
Later,
Joe
You have moved the backlash setting by installing the carrier bearings and races as gordonm has mentioned, the the he didn't say was , the wear pattern was already set in the ring and pinion. There is a good chance that you will have a cruise or decel whine if the backlash setting is not back where it was with the old bearings. It could be very minor or maybe no noise at all... but there is a chance. Gordonm is correct on the backlash setting .005-.008 , I set mine up a little on the tight side .003-.005, as long as it is not over .010 you should be fine.
Hope everything works out.
Later,
Joe
Thread Starter
Racer
Joined: Sep 2000
Posts: 485
Likes: 1
From: Dallas Texas
Re: Rearend aficionados (PBJ)
Thanks for the advice, guys. I found out what the problem was, I took that caps off and evidently I had not gotten the races/bearings completely seated. I made a couple of adjustments and now no binding. I am going check them with the dial indicator this weekend and then if everything is OK put the cover back on and go on to the next project.
