full throttle at 80mph won't shift
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Joined: Apr 2015
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full throttle at 80mph won't shift
Hey guys im new to this i wanna introduce myself first im from phx az my truck is a 95 dodge ram 5.9 mods: on it ss/t rims , m1 intake manifold , msd 8mm sparkplug wire, msd ignition coil , eletrical fans ,shorty headersand 410 gears , 4/8 drop kit and hypertech module not sure if it does anything though bought it on craigslist. Well this is my 1st truck i installed everthing that has been done to it and since i installed my new rebuilt tranny when i floor it all the way wont pass 80 mph like it wont shift and stays "bucking" but if i let go off the gas a bit it does pass 80mph and shift. i really need help any suggestion or feed back will be greatly appreciated 
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Joined: Apr 2010
Posts: 87,399
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From: Clayton MI
I wonder if at full throttle, the trans normally wouldn't shift until RPM goes higher than what the PCM Rev Limiter allows..... Letting off the gas tells the trans to shift a bit sooner, and prevents you from bouncing off the rev limiter.
