i need to know what the output shaft spline count on my 88 jeep 727 is. i have searched and asked anyone who should know i can find and cant get a definite answer. i have been told it is 23 and 32 spline. also i have acess to several 203s, one has 32 spline large female input splines, the rest have 27 smaller female splines. i am trying to find the right one for a doubler. ALSO, i am toying with the idea of running TWO 203 reduction boxes and a 205. i have the wheel base to do this i think(120 inches) but again dont know what spline count 203 i should look for for the second box. any info/help would be greatly appreciated. zach.

From what I've gathered turbo 350 = 27 spline, and turbo 400 = 32 spline, SM465 = 10 spline, ford tranny = 31 spline?, supposidly all dodge are the same 23 or 27 spline. This is for the NP203's input shafts, not 100% sure on all because nobody seems to know for sure. I've bin goin to wreckers and counting for myself. If you want a job done right.............................

The TF 727 from my 85 GW is 23 spline. (it's for sale too.... )

Keep in mind, the jeep TF 727s, are a common swap for D300 equipped CJs, and D300s have a23 spline input.

Just confirming what Charly said since nobody else has given a definitive answer. AMC 727's are 23 spline. I have one with a Dana 300 behind it sitting in my garage.