200-4r transmission in 1987 GN Buick

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  • #420
    hdavidcox
    Participant

    The transmission was shifting at a low RPM. So I adjusted the TV cable. Now it shifts at a higher RPM hard and will not shift at a lower RPM. I will shift into all the gears and does not seem to be slipping. It does not respond to any adjustments on the TV cable now.

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    #683
    Hostgator
    Member

    Here’s some information that you will likely find information. Did you know that you can overadjust an automotive cable to the point where it will no longer be responsive? It is true as you have found out. Automotive adjustment cables are, for the most part, constructed as cables within carriers. The carriers are usually attached to the an engine piece or an engine wall, while the cable within is moves and is adjustable. At some point, a cable can be stretched so far that it is no longer functional. There is just no more cable slack left and the result of that is that if you need to back off an adjustment to try to obtain lower settings, you cannot achieve those settings because the cable wants to remain in its last “remembered” position. In other words, the cable is stretched out and no longer useful. To fix this, you will have to find documentation on the engine subsystem and see where the adjustment cable setscrews are located and then adjust the cable so that all the slack is removed from the device and it becomes adjustable again.e

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