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Three Np231's
- Thread starter junkpile
- Start date
conestoga is looking for a 231 in the wanted section
The key thing to be asking is
A: which year they out of
B: Auto or Standard
There is a variance between older and newer 23 spline if they have short or long input.
When I did my doubler the input on my 231 was a short input but the input on the one that was made into the front was long input.
I didn't think it was a big deal as I figured I could swap input shafts. Yeah that doesn't work as the teeth are different on the input shaft and corresponding ring gear between the years (I think it was 95-97 it all changed (?) ) do not mesh and since the ring gear is pressed in you have to destroy the case to get the old one out. Basically measure the amount sticking out of the one being replaced and make sure it matches the one going in. Now if you go from a long to a short you may be able to get away with an extended seal.
A: which year they out of
B: Auto or Standard
There is a variance between older and newer 23 spline if they have short or long input.
When I did my doubler the input on my 231 was a short input but the input on the one that was made into the front was long input.
I didn't think it was a big deal as I figured I could swap input shafts. Yeah that doesn't work as the teeth are different on the input shaft and corresponding ring gear between the years (I think it was 95-97 it all changed (?) ) do not mesh and since the ring gear is pressed in you have to destroy the case to get the old one out. Basically measure the amount sticking out of the one being replaced and make sure it matches the one going in. Now if you go from a long to a short you may be able to get away with an extended seal.