I have a 1986 Trans am. I took the 305 out and put in a 383 stroker. the stock rear was not giving me the pull i wanted with the amount of horse power I had in my new engine. I have the 9 bolt inspection plate rear end, from what i understand it the borg warner. I have been told i can only get 373 gears for this rear end, which is fine with me thats the gears i was looking for. Ive been told this rear end is stronger then the 10 bolt chevy. Can anyone give me some in site on this? thanks Joe

 

If you have the 2.77 gears then you will have to replace the differential too. The 3.73 won't fit the 2 series that goes with the 2.77. If you have 3.27 or 3.45 gears then all you need is a 3.73 gear and a good installation kit. Do you have disc brakes?

 

Randy's has new 3.73:1 gearsets at a great price. while you're in there, your limited slip is probably worn out.

 

I have the 4 wheel disk brakes, as far as i know my car with the 5 speed came with 323, my friendmjust put a **** brake rear end on his 89 Z28, it has 277. he just told me he needs a spacer to make he 373s work. 277 only came in the automatics as far as i know

 

how do i look at randys deals?

 

www.ringpinion.com If your posi is worn anyway, better to get a 3 series posi than use a spacer, but the spacer is cheaper. That's all that can be said for it.

 

YOU can get 323,345.390

 

I'm a WD for Randy's. If you need information on parts let me know.

 

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