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High rpm shifts from 1st to 2nd

Bluelemon
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Bluelemon

Bluelemon

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Hey so the truck I have is a 1999 ram 2500 5.9l cummins. lately ive been having this problem where when I come to a stop and go to take off, the truck will stay in first gear until I get rev to 2500+rpm and it will shift by itself or I can keep feathering the pedal to try and shift it. recently replaced gov pressure solenoid, speed sensor, apps sensor, I checked TV cable there is no slack in it. Ive noticed if I shut the truck off and start it back up and drive the first few stops the truck shifts perfectly fine through the gears but once I come to a few stops and try taking off it will start to stick in gears more often. Also no codes are present, any Idea of what else I can check?

Edited by Bluelemon
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