2002 Firebird Trans Am / Install 7.5-7.625-4:10 gear install

**Buick455** · 07-08-2015, 01:55 PM

I am having big problems setting up this gear set , the pinion is noisy and when accelerating , noisy also.

Richmond 4:10 Gear set for 3 carrier. The car has a BMR adjustable torque arm with the drive shaft loop. I tried several times to correct the noise problem but cant seem to get it right.

Has anyone tried this combination? Automatic 4L60E.

Any Suggestions.

Buick455

**2002ssslp** · 07-08-2015, 04:57 PM

Who set up the rear when you changed the gears ? Did they use a new crush sleeve ? Did they set the backlash and run out correctly ? Did you have your driveshaft balanced ? What condition are your U-Joints in ? Does your rear have enough of the correct gear lube ? Is the housing set at the correct angle ? Try these ideas to see if anyone corrects the problem.

**Buick455** · 07-09-2015, 04:48 AM

Originally Posted by 2002ssslp

Who set up the rear when you changed the gears ? Did they use a new crush sleeve ? Did they set the backlash and run out correctly ? Did you have your driveshaft balanced ? What condition are your U-Joints in ? Does your rear have enough of the correct gear lube ? Is the housing set at the correct angle ? Try these ideas to see if anyone corrects the problem.

I set the gears myself and have been doing for a long time, Instead of the crush sleeve I used the Spacer ,the u joints are new the gear lube is correct ,I went over the pinion angle but according to BMR I might be to shallow ,I am set at 1* neg and they recommend 2-3 *
I am going to go over the whole install , it only cost a couple of Qts of fluid and let you guy's know .

Thanks for the response,

Buick455

**2002ssslp** · 07-09-2015, 05:17 AM

Originally Posted by Buick455

I set the gears myself and have been doing for a long time, Instead of the crush sleeve I used the Spacer ,the u joints are new the gear lube is correct ,I went over the pinion angle but according to BMR I might be to shallow ,I am set at 1* neg and they recommend 2-3 *
I am going to go over the whole install , it only cost a couple of Qts of fluid and let you guy's know .

Thanks for the response,

Buick455

I know what you are going through. Back in the day I raced Mopars and I have had my issues setting up Dana 60's. What was your contact pattern like ? Heel, toe or middle ?