TH 350 2WD vs 4WD

[JohnnyPopper]

Is the difference just the tail stock or is the output shaft different too?

I'm about to be pulling apart a K-10 and figure I should redo the transmission while at it.

I have a TH350 out of a C-10.

Thanks!

[Irish_Alley]

theres 2 different th350 4x4 tailshafts ( about 7/8" for the NP203 and NP205 and NP208 between 2" to 2 1/2"). and theres 3 different 4x2.

[JohnnyPopper]

Thanks Irish!

Is the output shaft the same?

I have a NP203.

[Irish_Alley]

not sure i follow?

no matter what it should be 27 splines and pretty sure its the same diameter. not sure if you can cut a 4x2 output shaft down to make it fit a 4x4 but i imaging you could have a spacer between the adapter plate and trans and then cut the shaft down. or i might be 100% wrong and you might be able to cut the shaft down

[JohnnyPopper]

Sorry Irish,

The word Shaft should probably be replaced with output drive that has 27 splines.

I imagine that they have various lengths due to long and short tail stocks.

I have a TH350 mated with a NP203 and have an opportunity to replace it while I have the motor out.

The replacement I have is out of a 2WD C-10.

I guess (unless someone here knows for sure) that I will have to take them out for a look.

Thanks again!

[Irish_Alley]

well one way is to take the tail shaft housing off the c10 th350 and measure the splines. if you have the first 7/8s of splines after the flange then it would depend on how much you need inside of the trans. if you dont have the 7/8s visible then you'll need a spacer