I have an 89 Iroc it's got a 350 but that's all I know about it. How do I find out what tranny and gears it's got?

 

there is two choices for trannys does it have 2 or 3 pedals on the floor, 2 its a 700r4. 3 its a t5. engine will be a TPI unless its been changed. gears will be able to tell unless theve been changed once you figure out your tranny

 

on second thought, you could only get a 350 with an automatic, so its a 700r4 look at the RPO code to find out the rear end ratio

 

Wheres the ROP code found?

 

If it Helps I have 4 wheel disc brakes. I've seen many camaros with drum on the rear. dose that help?

 

If you have an 89 equipped with OE rear discs (11.7" rotors and single piston alum PBR calipers), you should have a 9-bolt. The following should be an interesting read:

https://www.thirdgen.org/forums/faq-...now-about.html

Though the gear ratio is a bit different, 10-bolt info should be somewhat helpful:

https://www.thirdgen.org/forums/tran...-10-bolts.html

JamesC

 

Cool thanks! I did read the link you posted and, it got me wondering, how do I find out the gear ratio?

 

Jerk the diff cover. The numbers are stamped on the ring and pinion. For example: 41 (ring gear) divided by 15 (pinion) = 2.73.

JamesC

 

Two gear ratios for the 9-bolt with a 350 in 1989. 2:77 standard or 3:27 option, and in most cases it is the 2:77 ratio. So don't get your hopes up a about it being the 3:27, only 1426 Iroc 350's came with this option out of 12000 plus 350 Iroc's in 1989.

 

Cool thanks guys! Huge help!!