1997 - 2003 Ford F150 General discussion on the Ford 1997 - 2003 F150 truck.

possible transmission issues

Old 06-09-2015
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Default possible transmission issues

I've got a 98 f150, the 4.6 variety. I was pulling a trailer(unloaded) and while speeding up, under 2krpm, my truck started shuddering, like the feeling of a waterboarded dirtroad. I backed off the gas and then resumed acceleration and it was fine a while. Well during the rest of my trip it continued to do it intermittently, backing off the gas would help find the gear I guess. It threw a code, but the code was for missfire cy1, which has not popped back up since its been cleared.(today). Any ideas? This a bad deal where I'll need a new trans, or might the of be done. Oh yea, taking the truck out of OD seemed to help....ie. Not doing it as much or as bad.
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Old 06-25-2015
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Default Torque Converter

Have a transmission service garage check it out. Could be the torque converter.
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Old 01-09-2016
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if you are still in shudder condition, find correct misfire and replace that coil and boot. same thing happened to me and i also thought it was transmission related. first time all i had to do was replace boot. more recently coil and boot. need to do as soon as possible for it does put undo strain on OD.
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Old 01-16-2018
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Yes to above, check those things. An engine misfire will show up worse under load, where when not under a load will not be as noticeable. It could also be a brunelled cross joint in the drive shaft. If water got into a drive shaft cross joint bearing and rusted the needles that can make a shuddering sensation. A light load will not be so bad, a heavier load will make a shuddering depending on how bad the needle bearings are in the U joint. So do not over look that possibility.
good luck
Darryl...
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