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post #1 of 3 (permalink) Old 05-29-10, 07:18 PM Thread Starter
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Suddenly Slipping Transmission

Not a banner day at the farm. While unloading large round bales from the F250 XLT (5.4L 4WD, Auto), I think I may have pushed the truck around with the tractor tugging on the 500lbs bales and done something bad to the transmission. After that was done, I backed out of the drive and headed down mountain without noticing anything wrong, because, I believe, it's all downhill with little power needed to get along. Once down in town, I noticed a little slippage, but in higher gears everything cleared up. Stopped at the bank and the engine raced in first gear for a few moments, but the tranny caught and got me going. Pretty worried now, but needed to get feed. Judgment lapsed and I continued on. With a small load of feed I turned to head home and the slippage was absolute. Although, Park and Reverse seem fine, forward gears - at least first - are gone. Is there a way to force the transmission into second gear for testing purposes? What do you all think I've done to the beast?

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post #2 of 3 (permalink) Old 05-29-10, 08:47 PM
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Re: Suddenly Slipping Transmission

Putting the shift lever in 2, will lock it in 2nd gear. Is the fluid level good and has it been serviced regularly? If you have a 4r100 trans, it learns you driving. If you unhook the battery foe 10 min, it will have to learn all over. That may help.

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post #3 of 3 (permalink) Old 06-19-10, 08:34 AM
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Re: Suddenly Slipping Transmission

See if the problem goes away if you put the shifter in manual 1. Could be 1 way clutch in rear of tranny
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