erratic downshift
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Senior User
Joined: Jan 2005
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From: Harrodsburg
erratic downshift
question for the forum
i have a 96 7.3 4x4 chipped 80hp over stock, straight pipes and air induction
130,000 miles
every once in awhile I get an erratic downshift from over drive down 1 gear. rpms might jump 250 to 500. I usually take my foot of the pedal....if I don't it usually goes away within a few seconds.
truck is usually hooked to a 3 horse gooseneck trailer but had to run an errand an hour away yesterday and it happened again.
tranny temps are normal 150
I am not stomping on it and it is not a function of climbing a hill or a change in load
any thoughts??
i have a 96 7.3 4x4 chipped 80hp over stock, straight pipes and air induction
130,000 miles
every once in awhile I get an erratic downshift from over drive down 1 gear. rpms might jump 250 to 500. I usually take my foot of the pedal....if I don't it usually goes away within a few seconds.
truck is usually hooked to a 3 horse gooseneck trailer but had to run an errand an hour away yesterday and it happened again.
tranny temps are normal 150
I am not stomping on it and it is not a function of climbing a hill or a change in load
any thoughts??
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Joined: Aug 2009
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From: emporium
i would check the overdrive button. just replaced mine. the little cap on the end pops off and then you take a small flat head to the lens. (the parts that lights up with off.) it will slide out and then the switch will slide out.
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Could be:
1 bad overdrive button
2 wiring for the overdrive button wears on the steering column under the cover causing this.
3 lock up clutch in the torque converter is dying
4 4th gear starting to slip
5 In my case, it was hunting in and out of over drive, everytime it shifted into drive the overdrive light would turn on, on its own shifted back into overdrive and the light goes out. some time it would do it once in 10 minutes or 20 times in 1 minute. The problem ended up being a bad ECM, replaced it and truck ran good after.
1 bad overdrive button
2 wiring for the overdrive button wears on the steering column under the cover causing this.
3 lock up clutch in the torque converter is dying
4 4th gear starting to slip
5 In my case, it was hunting in and out of over drive, everytime it shifted into drive the overdrive light would turn on, on its own shifted back into overdrive and the light goes out. some time it would do it once in 10 minutes or 20 times in 1 minute. The problem ended up being a bad ECM, replaced it and truck ran good after.
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Senior User
Joined: Jan 2005
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From: Harrodsburg
thanks david and mountaineer I will check the overdrive button. I have not had any indication via the light coming on...but the wire could worn underneath.
As I said it is rally erratic. Hauled a horse to VA and back 12 hours each way and would randomly occur, then again not for hours.
appreciate the help ya all.
As I said it is rally erratic. Hauled a horse to VA and back 12 hours each way and would randomly occur, then again not for hours.
appreciate the help ya all.
Posting Guru
Joined: Dec 2005
Posts: 1,034
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thanks david and mountaineer I will check the overdrive button. I have not had any indication via the light coming on...but the wire could worn underneath.
As I said it is rally erratic. Hauled a horse to VA and back 12 hours each way and would randomly occur, then again not for hours.
appreciate the help ya all.
As I said it is rally erratic. Hauled a horse to VA and back 12 hours each way and would randomly occur, then again not for hours.
appreciate the help ya all.
1996, 1997, 2001, 4th, downshift, downshiftf150, downshifting, downshifts, e4od, erractically, erratic, f150, f250, gear
