Thunderstruck20
OBS Enthusiast
- Joined
- Aug 19, 2011
- Messages
- 77
- Reaction score
- 14
I have a 1991 GMC K2500 with what I was told would be a 27 spline shaft with my transmission but after trying to install the new part, I found that the input on the case did not match up with the tranny. What I would like to know is if it's even possible to change my input spline to a 32 count without completely changing the internals and if it is possible, would it be more cost and time effective than spending about $125 more for the correct 4L80E np241 case? I realize I don't know much about this topic so any input is appreciated.