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Thread: truck is shifting through all gears way too quickly.

  1. #1
    Lightning666
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    truck is shifting through all gears way too quickly.

    It'll pretty much shift through all gears in about 50 yards, no power at all. We changed quite a bit of stuff, radiator, water pump, plugs, wires, coil, installed a sound system, fog lights. Truck wasn't doing this before, so I'm thinking we did something at the time of swapping something out but I can't find anything. Any ideas. It'll shift manually, and it revs while in park, but once its in gear it'll shift 1st, 2nd, 3rd, way too quickly.

  2. #2
    Stroked & Blown
    Name: Billy D.

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    I'd start with new tps

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  3. #3
    Make NLOC Great Again
    Name: Raymond

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    Id check the TPS, but Id be looking at the grounds on the core support and then check how you wired that stereo.

    Is the check engine light on? Is the OD light flashing?
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  4. #4
    PSI=:-D
    Name: Jeff

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    Or check the tps output, see if it's weird. Maybe a grounding problem?

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  5. #5
    PSI=:-D
    Name: Jeff

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    Jinx Raymond

    Sent from my LM-G820 using Tapatalk
    #74 in 1995, Vermillion
    Tweaked and Turbocharged
    10.81@126.7

  6. #6
    Stroked & Blown
    Name: Billy D.

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    Fwiw


    Had a gen 1 last year

    Someone was chasing this problem so I got it at a good deal


    Someone had did tps
    Speedo
    Mlps
    And trans service

    I checked over

    Swapped computer. Bam was fixed


    Was only issue computer showed. So that's a possibility also

    Sent from my SM-G988U using Tapatalk
    1.51 6.55 @ 107.9 14 psi

    393w s484
    Chris Garrett e4od

  7. #7
    Lightning666
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    no check engine light, or flashing od light. Also swapped out the battery. Im going to go through grounds first. Ran some wires through dash for amplifier power, thinking maybe we moved something there also.

  8. #8
    Lightning666
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    was able to check codes, its showing 633 4x4 switch closed, and 622 shift solenoid 2. im looking through wires but can't find anything. Any ideas where this problem might be coming from?

  9. #9
    Stroked & Blown
    Name: Billy D.

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    Quote Originally Posted by mcbolt View Post
    was able to check codes, its showing 633 4x4 switch closed, and 622 shift solenoid 2. im looking through wires but can't find anything. Any ideas where this problem might be coming from?
    My bad computer was showing a 4x4 code



    Didn't show solenoid tho

    Sent from my SM-G988U using Tapatalk
    1.51 6.55 @ 107.9 14 psi

    393w s484
    Chris Garrett e4od

  10. #10
    Stroked & Blown
    Name: Billy D.

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    I really feel yours is the computer also


    See if can find 1 locally to try. Just make sure to have battery disconnected

    Sent from my SM-G988U using Tapatalk
    1.51 6.55 @ 107.9 14 psi

    393w s484
    Chris Garrett e4od

  11. #11
    Lightning666
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    im kinda leaning that way because all the wiring seems fine. I need to see if a friend will let me try his.

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