Rear end rebuild 1996 7.625

Rear end rebuild 1996 7.625

Postby Astrolife [OP] » May 22nd 2020, 7:07am

Hi all this is my first post, I wanted to document my trials here to share information. I swapped the axle on this thing with junkyard axles 3 times, all were no good. I ordered parts from O'reilly and hadbad luck with parts from them. I ended up rebuilding with a richmond excel ring and pinion, and motive gear bearing set from National Drivetrain. I went from a 3.42 to a 3.73. I used my buddy's shop press, a straight edge, calipers, vise, and various other common tools, and a Bauer electric impact for the yoke nut.
Attachments
Resized_20200520_151300.jpeg
20200520_151224.jpg
IMG_20200511_223103_491.jpg
Tools for the first set up.
20200511_201259.jpg
Pressing on the bearings using the old bearing cones and a stout pipe. Capped with a bearing driver.
20200511_202910.jpg
All the measuring tools, dial indicator, inch lb. torque dial, straight edge, and calipers.
20200513_124526.jpg
Finished product.
20200517_184716.jpg
Just for fun
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Re: Rear end rebuild 1996 7.625

Postby chevymaher » May 22nd 2020, 11:27am

Looks good. They sing a little when they are new till they break in. So up to 10 thousand miles they actually get a little louder then the wear pattern is broke in. It quiets back down.
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Re: Rear end rebuild 1996 7.625

Postby Astrolife [OP] » Yesterday, 3:22am

Thanks for the advice, it's good to know what to expect. Do you mean the richmond excel gears in particular? Or just aftermarket setups?
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Re: Rear end rebuild 1996 7.625

Postby Rod's Trucks » Yesterday, 7:24am

Brandon,
I think you will like the 3.73's.
I have that ratio in my '98 AWD, and I just ordered a Torsen rear diff for it.
I did a couple of GM style diffs (Opel race cars) many many years ago, but I have forgotten how much time I spent on them...and we were not worried about diff noise in a race car.
How much time do you think you spent on this regear?
thanks,
Rod
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Re: Rear end rebuild 1996 7.625

Postby Astrolife [OP] » Yesterday, 3:37pm

Rod,
Hi yes I have spent countless hours, but honestly mainly because it is my first time getting into a diff and I spent most of that time researching and troubleshooting, ordering parts that were not correct from places that did not have knowledge about the specs.

Actual work, maybe 10 hours. Once I knew what I was doing, I would say I spent about 4 hours on the pinion depth setting, then another 2 or 3 putting it all back together.

Other than that, this will be my fifth time swapping this axle since October so it's hard to tell exactly how much time I have spent LOL! :rolling:
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Re: Rear end rebuild 1996 7.625

Postby chevymaher » Yesterday, 8:57pm

Astrolife wrote:Thanks for the advice, it's good to know what to expect. Do you mean the richmond excel gears in particular? Or just aftermarket setups?

I used the same gears you did. No I meant the 7.5 7.625 rear ends. My brothers -04 pontiac GTO sounded just like the van. He took it in and they said it is normal.
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