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Message: [QUOTE="powerlifter405, post: 835811, member: 2044"] Good to know. I can find 3.55's gears and full axle sets so I may go that route. The only real way to drop weight in these truck is lose the SD frame and 1000lb motor 4.10's????? I have no idea why your mileage sucks :shocked: plus how fast you drive? @ 70 via GPS I'm at 2000-2100 and my mileage changes from 13 to 11 towing my bronco. AT 75 I'd guess 2250. If your mileage is acceptable w/ 35's then stick w/ it. IMHO 33's and 3.55's would make decent DD and Hwy truck if you spend less than 50% of your time towing. My empty to tow ratio is about 99 of 100. In 8 years my 02 had a trailer/tow bar hooked 4 times. My 6.4 in 3 years was about 6 times. 33's are less expensive to replace, you'll have less rolling resistance and they are easier to change on the road when you get into your older years. I'll drop my truck about an inch or so and try to eventually go 3.55's w/ the 33-AT's. FWIW, I do believe 3.55's AND 3.31's were offered at one time in the OBS models according to a quick parts search, as were 4.10's in a SRW. [/QUOTE]

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