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Discussion Starter #1
I just purchased a 02 f250 4x4 7.3 diesel 200000 miles no history on the truck.. It has no overdrive. The fluid is clean not burnt. It is showing a p0783 code, shifts fine up to 3rd then no overdrive. If you let of the fuel it goes straight to idle no matter what the vehicle speed is. If you turn the overdrive switch off the truck shifts fine also BUT when you let off the fuel it downshifts. I'm hoping it's in the solenoid pack. Any info on troubleshooting the pack? It's possible it could be in the valve body too. Looking for pointers on what to check for before pulling the transmission . It does have an edge tuner but I don't think it's working properly. I have it unhooked at the moment
 
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