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Re: Gear ratio from pinion gear stamp?
Quote:
Originally Posted by mosel70
I have a'70 C10 stepside. Appears the pinion gear stamp is NF GM86, hard to see in photo. I have photos of the other stamps on the differential exterior if that might help. Looking to swap trans from TH400 to 700R4 and need to know the gear ratio. Truck new had a M20 manual 4-speed. Thanks!
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3.08 gear was very common in 1970 1/2 ton . without checking the numbers stamped on the ring gear its only a guess.
Last edited by hjewell2; 07-29-2018 at 11:54 AM.
Reason: mis spell
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