converter issue?

Discussion in 'GM Powertrain' started by ras, May 14, 2009.

  1. ras

    ras Rockstar

    So my brother says that my converter isnt locking up I was just curious what other people with 99 to 02 z71 with a 5.3 were running at 65 mph rpm wise that is
  2. Jimmiee

    Jimmiee Epic Member 5+ Years 1000 Posts

    The RPM will vary depending on the axle ratio of the truck. If you have a tach you can see when lock up occurs. Your tach will drop about 500 RPM. After it's locked up if you watch the tach and touch your brake pedal you can see your converter unlock and the RPM raise about 500 RPM.
    Also, if your truck is not locking up you will see a P1860 or P0741 stored in memory.

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