I am getting a 1989 IROC 350TPI. What kind of transmission do I have in my car?

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'89 IROC-Z
Jasper 350 TPI
Mods Yet To Come

 

It will be a 700-R4 tranny.

All 350s came with the 4 speed auto although I have heard stories of a few 5 speed cars emerging from the factory. Never seen one though.

If you are interested, the gear ratios for the trans are listed in the tech section.

Robert

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1987 IROC-Z Auto (LB9)
Black/grey interior with the stance of a streetfighter

Mods
Custom exhaust. 4 Inch pipe from the headders all the way back to a single muffler at the rear. No Cat.

Future mods due in March:
K&Ns
RAM Air
Air foil
AFPR

Hoping to get a couple of tenths with that lot

 

Thanks, I looked in Tech but I didnt see the gear ratio thing.

 

Sorry, I goofed with that one. The figures were in the equations section.

Here they are though:

1st 3.06
2nd 1.63
3rd 1.00
4th 0.70

I can't remember what reverse is, they don't list it there. If you need any more help just ask, and welcome to the Thirdgen family

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1987 IROC-Z Auto (LB9)
Black/grey interior with the stance of a streetfighter
"I like to think of her as Arnold Schwartzeneger in a dinner suit" RMK

Mods
Custom exhaust. 4 Inch pipe from the headders all the way back to a single muffler at the rear. No Cat.

Future mods due in March:
K&Ns
RAM Air
Air foil
AFPR

Hoping to get a couple of tenths with that lot

Current G-Tech times
0-60mph 6.26 seconds
1/4 14.74@100.2mph (about 98mph corrected)run with no gas and in the freezing cold

 

Reverse on a Th700-R4 is 2.29:1

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