jimoshel Posted March 14, 2010 Share Posted March 14, 2010 Could some one please explain to me exactly what is a HPRC dana 30 and what is the purpose? :dunno: :smart: Link to comment Share on other sites More sharing options...
CWLONGSHOT Posted March 14, 2010 Share Posted March 14, 2010 A Hi-pinion axle runs a reverse cut ring gear. (From bottom to the top) Its not simply a upside down axle like some think.. The Hi-Pinion also doesn't use a crush sleeve as the std D30 does further making it stronger. The obvious purpose is to increase ground clearance... CW Link to comment Share on other sites More sharing options...
jimoshel Posted March 14, 2010 Author Share Posted March 14, 2010 Thank you, Link to comment Share on other sites More sharing options...
Pete M Posted March 14, 2010 Share Posted March 14, 2010 LP on the left, HP on the right Link to comment Share on other sites More sharing options...
Eagle Posted March 15, 2010 Share Posted March 15, 2010 A Hi-pinion axle runs a reverse cut ring gear. (From bottom to the top) Its not simply a upside down axle like some think.. The Hi-Pinion also doesn't use a crush sleeve as the std D30 does further making it stronger. The obvious purpose is to increase ground clearance... CW Actually, it can be argued that ground clearance is a side benefit. Ring gears are cut on a bias -- look at one from the edge and you see that one vertical side of each gear is almost vertical and the other side is slanted. The cut of the gears is optimized for strength when a rear axle is driving a vehicle forward -- which is what rear axles do probably 98% of the time, if not more. Take a rear axle and flip it around to use in the front, and now when the axle is driving forward the gears are engaged as they would be when driving in reverse in a rear axle. They are weaker when run this way. So for maximum strength a front axle can use special gears. We use the term "reverse cut" but the more correct term is "reverse bevel." Link to comment Share on other sites More sharing options...
Pete M Posted March 15, 2010 Share Posted March 15, 2010 Just as long as you don't call it "reverse rotation". :rotfl2: Link to comment Share on other sites More sharing options...
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