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2000 silverado 4x4 transmission problem?

Discussion in 'GM Powertrain' started by stanman1972, Nov 20, 2010.

  1. stanman1972

    stanman1972 New Member

    My 2000 silverado 1500 4x4 with 5.3 has a wierd problem that I think is transmission related. When I go from park or reverse to drive most of the time there is a noticeable lag like the tranny is being lazy going into drive. If i give it more gas it sometimes will bang into gear hard so i just easily feather it. Once it goes in drive it is fine and i can drive all over with no problems. It does this most but not every single time. Could the gear selector on the trans be acting up or do I need a rebuild? The truck does have 216,000 miles. thanks
  2. murdog94

    murdog94 Epic Member 5+ Years 5000 Posts

    Well when was the last time the tranny was serviced? if its been a while i would start there. then get it scanned for codes at your local tranny shop...
  3. stanman1972

    stanman1972 New Member

    I just bought this truck last week with known problem. No trouble codes and fluid looks good, just figured it might be an easy fix. May try changing the filter and fluid.
  4. stanman1972

    stanman1972 New Member

    Changed fluid and filter still does same thing.
  5. murdog94

    murdog94 Epic Member 5+ Years 5000 Posts

    Now not trying to be a jerk here but who checked for trouble codes?? since a tranny code cannot be read with most handheld scanners, and will not always illuminate the CEL... Also there are a few threads on here that talk about the valve body as well as line pressure etc..
  6. stanman1972

    stanman1972 New Member

    I used my mechanic friends snap-on analyzer and there were no trouble or history codes. Sometimes the tranny is fine and sometimes it acts up. Was wondering what the valve body and line pressure problems were and there symptoms?
  7. stephan

    stephan Rockstar 4 Years 5000 Posts

    Low line pressure can cause this. There are also specific pressures for each gear position selected. See if your friend has a 0 - 200 psi guage that you can plug into your port. You can find the acceptable pressures for each gear position online. Don't use a guage that has less than 175 psi max reading or it will probably bend the needle around the pin lol.. Don't ask how I know that last part...
  8. silveradotrailblazer

    silveradotrailblazer Epic Member 5+ Years ROTM Winner 5000 Posts

    If you service the transmission try putting in some Lucas trans fix. It removes old varnish that builds up in the trans and makes some of the valves in the valve body stick. I've talked with a few people that have tried it and they say it worked.
  9. murdog94

    murdog94 Epic Member 5+ Years 5000 Posts

    X2 here Ive used it with great results... on my 313ish K Miles S-10 Blazer and it made a HUGE DIFFERENCE!

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