I replaced the 1-2 shift fork and now tranny won't shift into 4th gear. Shifts smoothly in all other gears. It feels like it's partially going into 4th just not all the way. I replaced the shift fork shaft detent springs and ball bearings so I know the forks are moving smoothly. I also replaced the shift lever and alignment pins so the lever has no slop. I've tried turning the input shaft as I'm shifting with no luck. I'm at a loss guys. It's a muncie sm420

Last edited by Chevy's till I d; 01/24/2021 9:07 PM.