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2002 Ford F-250 4R100 transmission issue 1st to 2nd

Posted: Sat Jul 18, 2020 7:59 am
by Kris
My truck has 196k miles on the original transmission. Had a mild tune on it. Started to not upshift from 1st to second gear unless I let off the throttle. All other gears work fine and reverse. I took the tune off and returned to stock and it is still doing it after it gets warm. Tranny fluid is clean. From what I read it could be the solenoid pack or valve body. Looking to see if anyone had same issue. I don’t want to do a full rebuild unless it really needs it.

Re: 2002 Ford F-250 4R100 transmission issue 1st to 2nd

Posted: Mon Jul 20, 2020 6:06 pm
by racinfast002
Hey mine also did this. From what I read this is a sign it’s on the way out. Soon mine started getting slippy but it lasted another year. I just replaced the entire drivetrain

Re: 2002 Ford F-250 4R100 transmission issue 1st to 2nd

Posted: Mon Jul 20, 2020 10:27 pm
by <ZZ>
lol makes sence