[trishieldchief]

Originally Posted by 1RAMAIR1

That makes 2 of us. (lol) Today we pulled the Rear Differential apart and found something unusual. The setup appears to have never been taken apart and the original GM part number stampings were found on the Ring Gear. The Build-sheet for the car says it came with 3:90 series gears. When we opened it up, the gears were 4:11. What are the chances that the Factory installed the wrong ratio gears for the car?

I started a thread a few months ago, asking everyone here, if anyone, had a 69 TA with factory special ordered 3.90 posi rear axle.

After a long thread, it was concluded that all 69 RA III Trans Ams were 3.55 Posi rear axle cars.

Do you have the PHS for this TA and does it show special order axle?
If so, please post the PHS to your car.

Thanks Rich