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TH350 acting funny

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Suffergauge, Sep 6, 2002.

  1. Suffergauge

    Suffergauge 1/2 ton status

    Joined:
    Aug 1, 2002
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    Location:
    Olympia, Wa.
    This may be a no brainer, I haven't even dug into it yet. I thought I would start here to give me some ideas what to look for before I start ripping stuff apart & want it fixed asap. Keep in mind that this has been an issue since I bought the blazer and the guy I got it from said it has been doing this for awhile.

    When you shift out of park and into any gear it takes a bit to shift into gear. Reving the engine seems to speed up the process. It almost seems like there is a vaccuum problem ie. bad hose or modulator. Am I pulling to much vacuum from the engine, power brakes etc.? Doesn't someone make a booster of some kind? Once it is in gear, it shifts normal. There is another twist though. It has a higher speed stall converter. Don't know what speed it is but I have never had one so I don't know how they act.
    Thanks,

    Jeff
     
  2. Frank74

    Frank74 Registered Member

    Joined:
    Aug 28, 2002
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    Location:
    Woodland, CA
    I assume you have checked the level of the transmission fluid. If not, I had a leak and the fluid got low, which caused the transmission to slip-up on regular acceleration, and just run poorly, especially after the truck sat overnight. So check the fluid level, the key to a happy automatic is keeping it in normal operating temperature, and the correct amount of fluid. Heat will burn the fluid, and then kill the transmission.
     

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