Join Date: Sep 1999
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Re: here ya go Willys
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<font color=green>A reverse rotation axle is synonymous with a high pinion axle. They are called high pinions because the pinion enters the diff ablve the centerline of the axletubes. They are called reverse rotation because the pinion drives the ring gear in the opposite direction of a standard rotation axle.
The teeth on a ring gear have two sides, the coast side, which is the concave side of the tooth that has a strong slope to it, and the drive side, which is almost straight up and down and is convex. A standard rotation axle in the rear of the truck puts stress on the drive side of the gear, that is when the pinion turns and drives the ring gear when the truck is moving forward, it is pushing on the drive side, which is the best way to load the gear because that's the way the gear is designed to take load. A standard rotation axle in the front of a truck drives the coast side of the gear, which isn't nearly as strong a way to drive the gear, because it really wasn't designed to be loaded that way.
A reverse rotation axle in the front drives the correct side of the gear, so it's a stronger way to load the gear. A happy coincidence with this design is that the pinion is nice and high. Jeepers often use high pinion diffs in the rear, but it's for driveline issues, not to gain the true benefit of the reversed design.
That was a lot more info than you asked for, but I'm feeling wordy tonight...[img]images/icons/crazy.gif[/img]