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Power Strokes
94-97 Tech
Dana 60 Build and Swap
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[QUOTE="Garbage_Mechanic, post: 632457, member: 1610"] Sorry to be blunt, but some of you guys are full of bull. Since the beginning of 4x4 pickups there have often been mismatches of .01 or .02 in the gear ratio front to back. Often times it is a Dana front and a corporate rear but not always. I have seen many 3.54 Dana fronts paired with a 3.55 rear. and often 4.10 with 4.11. I'm sure there are others. I'm well connected in the world of gears, I deal with one or two commercial gear shops for the past 30 years. Know the guys personally. I'm sure of the facts. I'm pretty sure the Paystar 5050 6x6 water truck I've had for years has a slight mismatch between the 21,000 lb front axle and the 44,000 lb tandems. It has to do with how you end up at 3.54 or 3.55. 10 tooth pinion, 35 tooth ring gear = 3.50 11/39 = 3.545 Never seen a stock F150 with a Dana front and 9 in ford rear? 13/46 = 3.538. I don't know exactly which tooth count the 10.25 and the Dana 60 have but the idea is the same. Don't get wrapped up in it. 5 lbs of air in the tires changes the effective tire diameter (and thus gear ratio) more than the difference in 3.54 and 3.55. [/QUOTE]
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