what tranny will a NP241 work with

[redneckjones09]

im building a 98 Silverado with custom ifs suspension. but I need to know what transmission my NP241 t case will work with. a TH350 or TH400 or an 700R4? and if anyone has a trans that will work for sale cheap.. thanks

[J.C.]

Depends on the input of your case. Is it 27 or 32 spline?

[redneckjones09]

will a 22wd th400 work? cuz on the GM trans they have that adapter/ trans mount between the trans and the t case so idk if it would work? but ill count the splines and let ya know I need a trans asap. thanks

[Chevy Racer]

Spline count and adapter play a role. 400 is 32 Spline.  350 + 700R4 are 27 Spline.

[redneckjones09]

alright thanks. can I changes the input shaft on my t case to make a th400 fit?

[Mudbuster]

yes but you will also need the adapter for the 400

[J.C.]

I have a 241 ds drop for a 400. No adapter tho