Stock 3.23 rear in 90 GTA
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Joined: Oct 2003
Posts: 161
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From: Tomball Texas, right outside (north) of Houston
Car: 1990 GTA and 83,99,02 Trans Am WS6
Engine: 350 TPI,CrossFire 305 and LS1
Transmission: 4L60 and 700R4 and 4L60E
Axle/Gears: 90-3.23,83-3.42,99-3.73,02-3.42
Stock 3.23 rear in 90 GTA
What type of fluid do you use in the rear do I need a posi additive or anything special
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Joined: Jul 1999
Posts: 18,457
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From: Loveland, OH, US
Car: 4
Engine: 6
Transmission: 5
Yes you need posi additive. Use 75W-90 or 80W-90 gear lube, not the real thick stuff like 85W-140; preferably synthetic.
It has an Auburn clutch type posi in it.
It has an Auburn clutch type posi in it.
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