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Re: 2002 LM7/4L65E Swap limp mode
Trans needs computer correctly identified and things like tire size etc updated for practical things like speedo output. If the trans and computer dont' mesh, itll lock you in 3rd to get you home.
Your scanner should show P, T and U Codes to be useful.
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'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING 
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