Slips into OD when hot - PowerStrokeNation : Ford Powerstroke Diesel Forum
 
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post #1 of 3 (permalink) Old 11-11-2009, 01:49 PM Thread Starter
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Slips into OD when hot

Hello I have bought a 99 f-250 super duty recently. It has the 7.3 power stoke and an automatic. The truck shifts great when cold but after it warms up it sometimes revs the engine before it will go into OD. It just does it when driving normal and after it has warmed up. It doesn't do it all the time even when warm just periodically and it does not do it under full throttle. After it is in OD it does fine no slipping that I can tell. I have changed the fluid. The old fluid looked good but had a hint of burnt smell. Any help would be greatly appreciated. Thanks
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post #2 of 3 (permalink) Old 11-14-2009, 01:40 AM
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Re: Slips into OD when hot

Some specs would help some.Do you have a chip,shift kit,aftermarket valve body,ect.Could be a sticking valve for the overdrive and the cold fluid is thicker and works it better then warmed up.

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post #3 of 3 (permalink) Old 11-17-2009, 02:47 PM Thread Starter
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Re: Slips into OD when hot

Thanks for the reply. Everything is stock, no chips or aftermarket parts on the engine or tranny. The truck has 179,000 miles. The transmission feels strong other than sometimes it feels like it is slipping into overdrive after it warms up. And it only does it sometimes, mostly in traffic. Seems to shift fine when at wide open throttle. Once in OD it doesn't seem to slip as far as I can tell. Thanks again
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