4l80 tcc issue
11-09-2014, 08:59 PM
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4l80 tcc issue ok guys heres my problem I have a boosted 2002 Silverado that I just did a 4l80 swap on . I changed harness and loaded a tune from a 02 2500 . the tranny locks ups the tcc in reverse every time ,any ideas what it might be .the tranny is 2004 model . thanks for looking
11-12-2014, 03:24 PM
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I was having the same issue, i picked up a take out trans to replace the other unit that was causing the issue and it seems that the issue was an internal leak of some sort. I thought it was an electronic gremlin since I was swapping a 4L80e into my GTO but it was the trans itself. Its probably a cross leak.