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  1. M

    4l80e flakey rev and commanding 4th when in 3rd

    Good evening all. I am having some strange problems with the 4L80E in my 92 6.5L K2500, and I'm looking for some advice. The truck is new to me and has 180K on it, but the trans was rebuilt by a well known local trans shop at 152k. I've rebuilt blown manual transmissions before, but autos are...
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