You sure its a 7.5 rear?

Seems kinda strange to me. Because in 86 the V8 cars got the 8.8 rear. All others got the 7.5. And the 3.08 and 2.73 were standard gear in the V8 cars. I dont have a book with the specs,.. but seems like an awful tall gear to be used behind a 4 or 6 cylinder car. Usually with smaller motors you find a 3.45 or 3.73 gear. But the tag you have there is or was clearly a 3.08 in there.

Also,.. the tag means little if the rear gear has been changed.

With both wheels jacked in the air,.. count how how many times the drive shaft rotates for 1 full rotation of the wheels. If a 3.08,.. the drive shaft should turn near 3 times. A 3.73 would turn 3 and 3/4 times. 4.10,.. 4 times. Etc etc.


Also,.. is it a limited slip or posi rear?

No real biggie if its not a 8.8.
The 7.5 can take plenty of abuse on the street. At your current HP level you have little to worry about in the rear end. A fox 8.8 can be had for pretty cheap. I would work on the rest of the car first,.. and when you get to the point where everything is safe and reliable,.. and you your motor gets near the 300hp level,.. then its time to start thinking about an 8.8.

For now I would just enjoy your car and get the main things fixed first.

Hurst