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Getting ready to test drive the blazer.. trans fluid drainage question...

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by rocko, Jul 22, 2003.

  1. rocko

    rocko 1/2 ton status

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    Okay.. put in the 205/400 combo..
    Dropped the 700/241..
    The old burnt up fluid is still in some of the lines..
    what's the best way to get it out?
    Do I disconnect one of the lines on the radiator and crank it over til the clean fluid comes out?
    And if that's the way to do it.. which line do I disconnect?
    Or... does anyone have any better ideas?
     
  2. HarryH3

    HarryH3 1 ton status Author

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    Check with the local auto parts house for a can of aerosol tranny cooler flush. It connects to one of the lines, then forces a cleaning solvent through the line, the cooler, and then the other line (into a bucket, not your tranny! /forums/images/graemlins/wink.gif ) I suspect that you then need to flush the lines with compresed air, then hook everything back up and fill up the tranny with ATF. /forums/images/graemlins/thumb.gif
     
  3. rocko

    rocko 1/2 ton status

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    Thanks Harry...
    Appreciate the quick response..
     
  4. Derf00

    Derf00 1/2 ton status

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    Rocko,

    You are probably finished by the time you see this, but just did this a couple of weeks ago, two cans of the trans-cooler flush and lots of compressed air.
     
  5. rocko

    rocko 1/2 ton status

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    Thanks guys..
    I'm going to attempt it this weekend..
    Keep yer fingers crossed... /forums/images/graemlins/smile.gif
     
  6. 88Silverado

    88Silverado 1/2 ton status

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    If the tranny is installed, A simple way to flush it is to disconnect the top radiator line (return side) connect a hose to the radiator connecton and drop it into a big bucket. Secure the hose in the bucket so it doesnt fly around (makes a real mess...trust me on this one) Start it up and let it run for about 5-10 seconds then shut it off and add fluid. This will work fine for cleaning out the old stuff in the lines and cooler (this will pump 2-3 quarts out, It will start to spit air when the fluid gets below the pump level).It takes about 12 quarts to get a complete flush (torque convert). I do a complete flush yearly to my vehicles and have had great luck with longevity.

    Since your tranny is out, you can clean the lines out with compressed air. A small amount of burnt fluid left in the lines or cooler will be greatly diluted and will not affect the new fluid.
     
  7. rocko

    rocko 1/2 ton status

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    88.. thanks for the detailed instructions.. and tips..
    I greatly appreciate it..
    Can't wait to take it for her test run.. should be this weekend..
     

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