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Thread: How about a transmission tuning tutorial!

  1. #151
    Senior Member TLKSCHP's Avatar
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    Maybe I missed it but If VE tables being off can drop line pressure what about when you spray a dual nozzle methanol set up which changes VE? Does this require doing something different? I'm back to fighting a WOT 2-3 shift issue. Bounces the limiter around 8 times then shifts firm. Also could be trans going again.

  2. #152
    Joe (Moderator) joecar's Avatar
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    Measure line pressure at the tap on the side of the case, see what it does during the shift.

    Also log GM.TFMPRS, GM.GEAR and the other pids (VSS, RPM, ETC or ETCTP, MAP, MAF, ECT, TFT, TCCMODE) and post here.

  3. #153
    Senior Member TLKSCHP's Avatar
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    Quote Originally Posted by joecar View Post
    Measure line pressure at the tap on the side of the case, see what it does during the shift.

    Also log GM.TFMPRS, GM.GEAR and the other pids (VSS, RPM, ETC or ETCTP, MAP, MAF, ECT, TFT, TCCMODE) and post here.
    Had to get new laptop, lost all my files and some reason couldn't get efi live to work but all good now I think.
    Just need to locate a pressure gauge.
    If i had to guess its not commanding the shift all the time. went to the track and 1 pass shifted okay 10.89 @ 128 but 2nd pass wouldn't shift into 3rd and pulled 2nd all the way to redline 100 mph at the 1000ft and just bounced rev limiter. I lift and put in D and it shifts.

  4. #154
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by TLKSCHP View Post
    ...
    If i had to guess its not commanding the shift all the time. went to the track and 1 pass shifted okay 10.89 @ 128 but 2nd pass wouldn't shift into 3rd and pulled 2nd all the way to redline 100 mph at the 1000ft and just bounced rev limiter. I lift and put in D and it shifts.
    Post your tune file and some logs showing this.

  5. #155
    Senior Member TLKSCHP's Avatar
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    Well I planned on having a log to post today but i guess i still haven't figured out my software issue. Thought i got all the scanner 7.5 lined out and ready but all the pids, charts and themes are gone again. If i flash with V8 my dash wont work but is fine with 7.5 I noticed . starting to think i need to do a complete reflash i if can get this software working

  6. #156
    Joe (Moderator) joecar's Avatar
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    No worries, take your time.

    Use V7.5 to flash and log for this (for now).

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