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01-04-2017, 03:15 PM
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Senior Member
 Join Date: Mar 2003
Location: Colfax-California
Posts: 8,650
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4L80E conversion
Have the wonderful 700 in my 91. Needing something a little more heavy duty. Anybody done this swap? Aside from the obvious t-case spline and driveshafts. I'm more inquisitive about the electronic part. I know I'll need a harness to the trans, so what about the computer? different one or just a PROM swap? How will the harness plug in? This is a 91, the first year available with the 4l80 if it were a 3/4 ton
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