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  1. NDT

    Educate me on HMMWV 6.5L GEP conversion?

    Oh, your question is "how to I convert my Turbohydramatic 400 transmission to a 4L80E Turbohydramatic transmission. Search 4L80E in the HMMWV forum, subject has been covered over and over.
  2. NDT

    Educate me on HMMWV 6.5L GEP conversion?

    Your question is not clear. The only difference between a GM 6.5 and a GEP 6.5 are internal casting changes to prevent cracks. Possibly you mean 6.5 NA to 6.5 turbocharged?
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