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Message: [QUOTE="tbsimmons, post: 124893, member: 2026"] I had an 04 F350 SRW with 35's. Truck was a daily for a while but mainly a tow vehicle for the trailer. THe problem with 3.73's or lower gear in these truck I feel is it is hard on the drive train. Dont have a big mechanical advantage to get stuff moving. This doesnt seem like a huge problem with diesels because of the torque. I went to 4.56's with 35's and liked it. It pulled much better, no more being between gears. Now if I didnt tow I would have stayed with 3.73's because of the cost of gears and such I would have not got the benefit out of them. With 35's to around 38's and daily driver with some light towing I would install 4.30's. If towing often and it is a lot of weight I would install 4.56's. Then if larger than 40's, 4.56's and 4.88's. I would figure out what RPM you want to run at on the freeway and find a calculator to figure out the gear that works best for you. But then again it is your truck and what works for you wont work for most. [/QUOTE]

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