BLACK Z

10079856 oo/81 13-52-176 16612 13-52-066-925 The tranny is from a 88 iroc and it is a t-5. They came off of the tranny it self and are in order.

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812MANY

I think I saw a post about T-5 numbers around here somewhere.. Do a search... Someone posted every T-5 assembly # from like '84-present.

It can tell you the gear ratios, year and what motor it was originally behind..

BLACK Z

Thanks How do I do A scearch? sorry for the dumb ?

AlkyIROC

10079856 = RPO M39
16612 I'm guessing is the last 5 digits of the car's VIN number.

Not sure on the other codes. They usually mean production dates, plant etc.

BLACK Z

Does anyone know waht a ratio the m39 has? thanks

GMTech

2.95

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