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  1. #1
    Sr. Apprentice
    Join Date
    Dec 2008
    latham, ny
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    Default transmission slipping

    when my truck is running cold it shifts fine, but once it gets warmed up it will start to slip badly. i already put a new motor gas tank and did all the brakes over so i want to keep this truck going. it causes me to lose alot of power when accellerating, and i want to fix it asap. does anyone have any idea what would cause this?
    92 k1500 chevy w/t 4x4 with a v6. glasspack. 8ft bed. regular cab.

  2. #2
    TrailLeadr's Avatar
    Join Date
    Jun 2005
    Coventry, Rhode Island


    When was the last time the transmission oil and filter were changed?
    Rhode Island

  3. #3


    If you have more than 50K miles on the truck, I'd go for a complete flush. Dropping the pan and changing the filter will get about half the old fluid out. Alternately, in lieu of paying $100 for a shop to do it, pop the transmission cooler lines off the radiator (have a bucket ready, there will be a bit of spray) and blow compressed air through the top line. Have the drip pan under the transmission and the bucket on the bottom line. That should get just about all the fluid.

  4. #4


    The line pressure in your transmission is electronically controlled. If your transmission is slipping you will have a code stored in memory. Get your truck scanned for codes before wasting your money on filters and fluid. You may have to drop the pan again to fix the problem.

    2004 SILVERADO 2500HD LS
    Pro Comp Leveling Kit
    285-75-16 Cooper ST All Terrains
    Pro Comp Programmer
    Bilstein Shocks
    Linux Bed Liner
    Tinted Windows

    Other rides:

    1967 Landcruiser <350 Chevy>
    1970 Camaro
    1990 Geo Metro Convertible
    2007 FJ Cruiser

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