So I'm going to leave the NV4500 as 23-spline output, which means that I needed a 23-spline input for the NP241.
I had an idea. After reading about people swapping in 6-gear planetaries from NP241s into their NP231s, I figured I could just use an NP231 input shaft.
Ken let me have some NP231 leftovers. It was behind a '96 AW4.
There are a few differences in the input setups on NP231s. This also applies to NP241s.
- Gear cut (early/late model. Year break was '94 I believe?)
- Input bearing width (16mm vs 24mm)
- Input shaft length
- Input shaft spline count
For whatever reason, the stars aligned and the input shaft out of Ken's NP231 fit perfectly once I swapped the narrow input bearing into the NP241 (same OD/ID).
Here's all the pics. None of it fully assembled, but trust me it worked :laugh:
3-gear vs 6-gear planetary
23-spline narrow bearing, late cut input shaft vs 27-spline wide bearing, late cut input shaft
Narrow bearing (16mm) over Wide bearing (24mm)
NP241 left, NP231 right. The casting of the NP241 is all around bigger, beefier, and has more ribbing/webbing/support.
Another thing to note is the beefier range fork of the NP241. Didn't have all the parts to try it in the NP231 for the stock drivetrain guys as a possible "upgrade".
So big thanks to Ken (kastein) for giving me this case. I'm going to look for an input shaft in slightly better condition though, but this confirmed my thoughts :laugh:. Thanks dude.