Overdrive unit for 4l80e with ORD magnum box with driver side drop np205 transfer cas

powellbr5591

New Member
May 4, 2016
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0
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Hi all, I was wondering if anyone knew of an overdrive unit like a gear vendors unit that I could put in between the 4l80e and my transfer case assembly that way I have better highway mileage and performance. I also wonder how long it'll last because it's going into a 1993 chevy k1500 that I'm swapping a new frame under and I'm gonna drop a gen 5 454 that's gonna be making 6-700 horsepower, rear axle will be a 14bff with AL wheel hubs, chromoly shafts, 4.10 gears, and an ARB air locker, front will be an AAM 9.25" IFS kit with fleece performance shafts, PPE diff cover, 4.10 gears, and an air locker.

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Tiki

Well-Known Member
Jan 23, 2011
1,581
402
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700 HP 454 and gas mileage in the same sentence? What now?