tranny shifts hard into 2nd (is it sensors????)

[lovejinx]

http://www.f150online.com/galleries...0&anum=6772 i have a92 bronco with 125,000 miles on it and my transmission is shifting hard....., sometimes, but not all the time. when it shifts smooth it's really sweet, but when it shifts hard.., it really sucks!! i have replaced the IAC motor (because it was idling rough, thinking that may have something to do with the tranny), and replaced the TPS (because the IAC didn't fix the idle). well now it doesn't shift as hard......., and doesn't happen as often as before. but still shifts to 2nd rough! WHAT ELSE CAN I TRY (other senors)???? Help........... hate this trial and error stuff!!!!!

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[bratman2]

I am going to step out on a limb, have you changed your transmission fluid lately. My 2000 F150 did the exact same thing from new, sometimes at half throttle or so it would shift hard into second. At 30k miles I switched to Redline synthetic transmission fluid and it completely cured it.

[lovejinx]

yep did it........thanks for the input.