Transmissions and DrivetrainNeed help with your trans? Problems with your axle?
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When I let my TH350 trans shift itself from 1st to 2nd it shifts fine (5000rmp-ish) maybe a little less. When I manually shift it out at 6000rmp it takes for ever to shift and it is really soft. My friend said it may be that the vaccume drops too much at the higher rpms and the tranny doesnt have enough to make a firm shift. Is this true and if so how can i fix it. Also how can I move my (automatic) shift point to a higher rpm. With my new motor setup I would like to shift out around 5800rpm.
__________________ 79 vette: 355ci; Q-Jet; Weiand Action + intake; Dart 200cc-72cc-2.02 heads, 9.5:1 compression?, Crane Roller Tip Rockers, Comp Cam XE 268, Full length Headers - 2.5 inch duels- H pipe, TH350 trans, 3.55:1 possi, Accel HEI Ignition, & Edelbrock Performer Nitrous Kit 50-75-100 hp.
Automatic wide open throttle shift point is raised by lightening the governor weights.
The vacuum modulator gives line pressure a boost when it has little or no vacuum, first try adjusting the modulator screw clockwise, this will increase modulator pressure and make the shifts alittle more firm and later.
