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Message: [QUOTE="qzillanut, post: 1513294, member: 10675"] Some simple math you might grasp. If you pull a 6.7 truck in high range 1st gear you will pull at 14.1:1 final drive ratio. It’s 3.974X3.55 if you have 3.55 geared truck. Which is a decent final ratio for a diesel. If you pull in low side of the transfer and 3 gear of the trans it’s about a 14.6:1 final drive ratio. To break that down it’s 1.516X2.71X3.55. I’m not 100% on the transfer case ratio. I’ve found a few discrepancies on it in my brief search to prove a point. It’s irrelevant to the point. So the engine produces roughly 1500 ft lbs of torque at the crank when tuned. We will use that as a constant for the math of my point. And we won’t consider losses for the sake of a point because they will be fairly linear. So pulling in high range the rear output of the transmission has to deal with roughly 5,961 ft lbs of torque at full hook, full power, no parasitic losses. Pulling in low range the rear output of the transmission has to deal with roughly 2,274 ft lbs of torque at full torque, 100% hook, and no parasitic losses. However the axels deal with roughly 21,150 ft lbs of torque for high range and 21,750 ft lbs for low range 3 gear transmission. Of course no losses. I simply stated all of this to illustrate how torque is distributed differently amonst the drive train under load. [/QUOTE]

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