8.5

[wadedog]

I checked again, and those numbers are correct.
They were stamped on the axel tube.

Any idea what this rear is, I know it's a 8.5 rear.

 

[workingr]

Wade,
I know this is an old post, but I have been busy over the last year. Was doing some catching up.

I have a rear out of a 1986 Olds Cutlass 442. The code on the axel tube is "2TR6G353" on mine.

Rob

 

[wadedog]

So any idea what mine is then?

my numbers are similar to yours.

mine 8TFG014

yours 2TR6G353

I bought new gears ,posi, axels and installation kit and it's built now so i guess it's all interchangable for what ever it is but i sure do wish i knew what it is exactly.
thanks for posting workingr.

 

[monzaz]

Closest I can get with those numbers are 2TP (2TR) being a 8.5 3.42 200r4 transmission 3.8 litre engine 1986 numbers...

The other one( 8TF) closest I can get is a 8TP being a 3.8 200r4 transmission and 3.42 8.5 rear again 1985...

I tried...Jim

 

[monzaz]

Now that 8TF could be a 3TP making it a open 3.42 8.5 also...??? But on the Buick GN forum 3TP is a limited slip 3.42 8.5. So someone has there number wrong as usual on the internet. GO figure!

The 2TR could be a 2TF 3.73 open diff from a monte carlo SS but that is a 7 5/8 rear...???

 

[wadedog]

Thanks Monzaz, maybe my numbers are worn down and not legible.

anyway to know if it's a olds rear or GN ? or are they exactly the same shipped from the same factory line to different car asemble plants.