Pcmofnc would know. They make a wiring harness that adapts a 4L80 to stock 6L80 wiring harness and computer. They told me it would not work on a m6 to 4L80 though. I guess you would have to switch to a stock A6 wiring harness. Are the plugs on a 6L80 the same as a 6L90?
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ECS Ysi-B, cam, Tsp 2" longtubes, Squash dual pumps, Id1300s, meth, 4L80e, FTI 3600, ZL1 3.73 diff, BMR suspension, 15" conversion, weld rts mt 275 et street R. 9.6@147mph
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