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transmission flush, help or hinder?

This is a discussion on transmission flush, help or hinder? within the Automatic Transmission forums, part of the Drivetrain category; A couple of times now my 99 TA has bounced of the rev limiter insead of shifting 2-3, not everytime, ...

  1. #1
    Junior Member
    Join Date
    Sep 2007
    North America

    Navy Blue Metallic
    1999 Trans-Am

    transmission flush, help or hinder?

    A couple of times now my 99 TA has bounced of the rev limiter insead of shifting 2-3, not everytime, but it happens. After a few searches I've found a bit of info and it seems it's not uncommon and can be an early sign of impending tranny trouble.

    I'm considering a transmission flush, and rear gear oil change while I'm at it, but I've noticed some controvercy about if it's a good idea or not. Opinions on if a tranny flush is a good idea?

    If/when I do go ahead with it, what fluids (availiable at your local jiffy-lube) would you recommend, because that's where it's going to be done. I'm not capable of ding the work myself and I'm no more trusting of the stealership than I am the drive through oilchange joint and at least the drive-through has conveinience on it's side and I can see it being done.

  2. #2
    Your dealership guy konigandy6's Avatar
    Join Date
    Aug 2007
    Romeo, MI

    Velocity Yellow
    2008 Corvette Z06

    IMO, go to the dealership for the transmission service. Most GM dealerships have a special machine that uses a pressure cleaner. It sucks out all the old fluid, sends a high pressure cleaner through the trans, torque converter included and then puts new fluid in. Usually charge around $150 and recommend every 60k, so just a good investment for the $$. Just my opinion.

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  3. #3
    Super Moderator mrr23's Avatar
    Join Date
    Jul 2005
    orlando, fl

    2014 camaro 2ss/rs

    if it's bouncing off the limiter on the 2-3 shift now, a flush will not help at all. most likely hurt. transmission fluid has detergents in it to clean. if the clutches are worn, it'll clean whatever you have left off. your 3/4 clutch pack is getting worn too much.

    you can crutch it, by raising the line pressure, to apply more pressure. but, time to save up for a rebuild.
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