My 1986 240 with an m46 transmission that has around 235K on it shifts hard from first to second gear. It doesn't grind, it just feels like the gate is stiff as it goes into second gear. Then to go back into first gear, i have to be well below 20mph or else it won't go into first. The gate simply won't let me. I'm curious if anyone has any clue or a possible fix to this problem that won't cost the price of a rebuild or something like that. The fluid is new and changed, i recently had a used(but great) OD unit put on, and otherwise the tranny seems fine...except for that odd whining noise which started after the new OD was put on and stops as soon as OD is engaged. Anyways, that's two questions now, so thanks to anyone who could give a bit of info.