Okay. So can anyone explain this. 1965 c20 sm420 drove fine but had a broken top. Where the shifters going In. Shifted ...but it was sloppy. OK now Here's where it's tricky. 1965 K20 sm420. Both tops of transmissions had same part numbers same throw. Just in better condition. Put the good lid on the c20 sm420 and the thing won't stay in second. Accelerating. Decelerating. Anything. And 4th gear wined like crazy. Horrible to drive. Just put the old top back on that the c20 trans came with. And boom shifts perfect. I get why it's shifting fine now. But why wouldn't it take the k20 top. Only thing I imagined is that it had a different wear pattern or the shift fork was bent because 4x4 are usually driven harder. Any thoughts? And I think it looks a little like an nv4500... it's my fake nv4500/sm420.
but now she's a runner And fun to drive again. Also my front drivers side brake is not Working. Need to look into that next. Till then I just backed the adjuster all the way out.