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Search results

  1. K

    4l80e no lockup

    Help I have a 4l80e that will not go into lockup. I have all gears no trouble with up or down shifts. lockup rarely occurs like it use to in 3rd gear at 47 mph or 4th at 65 mph. it has 171,000 miles on it. Had anybody every had a brake switch cause this issue. Once ago I had an ignition switch...
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