Would it be possible to figure out the difference between a w5m31 and a w5m33 in a percentage. My Mitsubishi manual states the final reduction as 4.92915=w5m33 and 5.208=w5m31. Then change two tires to compensate for different final reduction. If nothing else get it close enough to drive the car without worry about locking the the center differential to the repair shop one more time. Matt
Zach your right I found the info I needed at http://www.vfaq.com/mods/Trannies.html It looks like the rear differential of the vr4 is 3.545 and the gsx is 2.846 so I would have to run 10 percent larger diameter tires in the rear and 10 percent smaller tires in the front. You could almost make it look like the old American Muscle cars of the past.