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These trannys are very sensitive to the TV cable. If adjust my 700R4 like the factory or Mike's web site states the shifts are too early. I just kept adusting mine until I liked them. I have mine set at 1 shift ~15 MPH 2 shift ~30 MPH 3 shift about ~45MPH (higher if I plenty of throttle on it. What year is your truck? I think GM started locking the converts on 4th after 85. I know at least the 82-83 lock in on third. Mine does. I think the 84 do too. The factory directions are just general. Keep moving the TV cable at the bracket until the shift points are close to mine. After that ensure the cable is fully extended at WOT. I know my 305 just does not have the torque to kick it down hard on high speeds. How ever on a good load or slow speeds it will kick down to 1st!. I've even done it from OD!!
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