Originally Posted by steveo i have a third option. jiffy marker the input and output, spin, count, grab a calculator. With an open differentail just make sure that both tires spin one full revolution.
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42! 1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner! -= =-
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