Keystone Diesel
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Hi! Would anyone have a pdf manual on this transmission they're willing to share? I'm working on an M939 for a friend, it's a gutless wonder lol, I'm not happy with the shift points, it upshifts fine but wont downshift until the rpm hits 1400 and at that point there is no recovery, it's on its knees, I've adjusted the modulator cable in both directions, tightening it up did raise the downshift point to a higher rpm but I still need more. It's a 5 ton dump and pulls a hill empty in 1st gear at 1500 rpm, 170 lbs of rail pressure. Any help would be appreciated, thanks, jeff