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auto tranny won't shift to high gear 700 1991

any ideas on what is causing this? When car is first started and put into gear to take off everything is fine and shifts ok untill high gear, which it won;t shift into for mabey 5 miles. After the oil is warm it works fine so it seems to be temperature related is there a heat sensor that must be satisfied befor it shifts.








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auto tranny won't shift to high gear 700 1991

check the OD lockout switch on the top of the tranny. better to just get one, sicne they're cheap and don't bother testing it- just put in the replacement and see if that fixes it. erractic, heat realted OD failure is usually caused by the switch's wear to the point where it barely makes contact inside the tranny.








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auto tranny won't shift to high gear 700 1991

I'm not trying to pass the buck but the FAQ has a fantastic section on overdrive problems. Follow this link and go to the section "Overdrive Relay and Function". I know this will answer your question. 700-900 FAQ Auto Transmission
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Tony Turner 89 Volvo 240DL 257K, 1980 Mercedes 240D 360K, 1982 Mercedes 300D Turbo Diesel 153K (R.I.P.), 2 1992 Geo Metro Convertables (I'm not sure why??)







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