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Thread: 98 411 swap now tranny acting up!

  1. #1
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    Default 98 411 swap now tranny acting up!

    I did the 411 swap last night, now the tranny will shift from park to reverse and to drive. It will shift once then goes to third and holds third and wont shift out of it, or lock the TC. It is shifting really hard. I'm getting a shift solenoid error cant remember the error number. It was late and I was tired so I gave up! I will post the tune up later when off work, does anybody have any ideas?
    98 silverado 4wd excb 5.7l, zz4 cam,roller rockers, shorty headers, 0411 swap, Flash Scan V1 commercial

  2. #2
    Joe (Moderator) joecar's Avatar
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    Sounds like the transmission harness has no power, or the connector is not mating, or some wires are pinned wrong.

    3rd gear = both shift solenoids OFF.
    hard shifts = high line pressure = pressure control solenoid zero current.

  3. #3
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    Hello haulinit,

    +1 on Joecar’s comments. Check you’re wiring diagram (pin by pin) and connections. Someone to help, and a digital voltmeter set to “continuity”, will make checking the wiring harness a little more expedient.

    Post your tune if want that checked - but this sounds like a wiring issue.


    Regards,
    Taz

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    Thank you will do. I spliced the 4 wires down at the park/neutral sensor.
    98 silverado 4wd excb 5.7l, zz4 cam,roller rockers, shorty headers, 0411 swap, Flash Scan V1 commercial

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    I just checked my wiring and found the miss placed wire hopefully this fixes it!
    Last edited by haulinit; November 15th, 2010 at 11:49 AM.
    98 silverado 4wd excb 5.7l, zz4 cam,roller rockers, shorty headers, 0411 swap, Flash Scan V1 commercial

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    In your 1998 wiring harness the 2-3 (or 3-2) shift solenoid control was probably a yellow / black wire - originally at pin 4 in the C2 (red) connector of the black box Vortec PCM.

    In a 1999 - 2002 wiring harness it would be a white wire. When you locate the above mentioned yellow / black wire - it connects to pin 79 in the C1 (blue) connector of the 0411 PCM.


    Regards,
    Taz

  7. #7
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    Quote Originally Posted by Taz View Post
    In your 1998 wiring harness the 2-3 (or 3-2) shift solenoid control was probably a yellow / black wire - originally at pin 4 in the C2 (red) connector of the black box Vortec PCM.

    In a 1999 - 2002 wiring harness it would be a white wire. When you locate the above mentioned yellow / black wire - it connects to pin 79 in the C1 (blue) connector of the 0411 PCM.


    Regards,
    Taz
    Correct my eyes must have wandered when putting this wire in.
    98 silverado 4wd excb 5.7l, zz4 cam,roller rockers, shorty headers, 0411 swap, Flash Scan V1 commercial

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    You got things working correctly, I take it ?


    Regards,
    Taz

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    Yeah, I need to figure out how to get it start and idle correctly now. I think the cam is messing with it. When it starts it blubbers really bad and is rich from the smell. If you poke the throttle a couple of times and hold it above 1500 rpms for a bit it will idle fine after that.
    98 silverado 4wd excb 5.7l, zz4 cam,roller rockers, shorty headers, 0411 swap, Flash Scan V1 commercial

  10. #10
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    Once everything is working correctly, it is good idea to undertake a crank learn, idle learn, and BCM link (if you are using one).

    If memory serves the ZZ4 cam you’re using is a 208 / 221 grind on a 114 lobe separation angle. These generally produce a “flat” torque curve, and usually idle fairly well.

    Regards,
    Taz

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