No shift into 2nd at 125 deg - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 2 (permalink) Old 05-15-2018, 09:55 PM Thread Starter
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Join Date: May 2018
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No shift into 2nd at 125 deg

I just started have a shift problem when weather got hotter I have checked my actualor valves nine sticking I check and looked for codes with AE ford Inhanced. I did find out that 1& 2 silnold would stay on so replaced all and cable.
I have looked over all forums and have found nothing. But when over 125 if I rev to the limiter and let off it will shift, I can’t manually shift in to 2 either. Oil looks good no partials in pan at all. I spoke with a good tranny guy that said I should take a heat gun and check valves with heat applied (yes it will be removed) I’m using oreallys global (I think this is the problem) my order of Amsoil will be here tomorrow. I have replaced my VVS also. Does anyone else have any suggestions.
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post #2 of 2 (permalink) Old 05-16-2018, 02:02 PM
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Join Date: Aug 2007
Location: SE Florida
Posts: 3,015
Re: No shift into 2nd at 125 deg

Is this a 2001 7.3L? If so, you most likely have a failed mechanical diode one way clutch. That requires a rebuild to fix. You must replace the mechanical diode with a sprag type one way clutch.

Former Ford Automatic Transmission Engineer

“The good thing about science is that it's true whether or not you believe in it.” ― Neil deGrasse Tyson
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