Twins: I played around with my 77 coach's gearbox (Ross) and what I did is contained in several posts on this site, you can search based upon my name; 77newell to find them quickly. A couple things I would note off the top. Adjusting this box is not straightforward, play is normal when the engine isn't running, eventually the seals inside go to heaven (or hell, your choice) and the unit needs overhaul. After tweaking mine as far as we could I had it overhauled and am glad I did.
Jon - 77 coach civic toad
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