Need some Gear help!!

swilliams1005 · April 3, 2005

I am considering changing the gears in my truck i currently have the 4:10's and wanting to get some better gas milage what should i go with and who to get them from thanks.This is for my truck in sig.

Shotgun · April 3, 2005

I am considering changing the gears in my truck i currently have the 4:10's and wanting to get some better gas milage what should i go with and who to get them from thanks.This is for my truck in sig.

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Changing your gears will make a very small difference in gas milage plus you would lose towing power. It would be cheaper to increase your tire height a bit and get the same results and you could always change back if you wanted to. If your set on changing gears you could go with 3.73's and I recommend Yukon or Auburn gears from Randy's ring and pinion.

snoman · April 3, 2005

I am considering changing the gears in my truck i currently have the 4:10's and wanting to get some better gas milage what should i go with and who to get them from thanks.This is for my truck in sig.

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Changing your gears will make a very small difference in gas milage plus you would lose towing power. It would be cheaper to increase your tire height a bit and get the same results and you could always change back if you wanted to. If your set on changing gears you could go with 3.73's and I recommend Yukon or Auburn gears from Randy's ring and pinion.

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There is a chance that going to 3.73's will lower MPG too. That is a big heavy truck and it takes power to move it down the road. You have about best combo now for power and MPG with OD. If you really want better MPG you could go to smaller smooth tread tires for reduced rolling resistance. But for any big change you need a lighter 1500 truck with a smaller motor too as 6.0 in 2500's are no MPG champs either in big cabed trucks.

swilliams1005 · April 4, 2005

Well i have gone up on tires size from a 245 to a 265 and didnt see that much of a difference.

snoman · April 4, 2005

Well i have gone up on tires size from a 245 to a 265 and didnt see that much of a difference.

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But if you have a agressive tread on the bigger tires that uses extra power too. For the first 8 or 9 years I owned my 89 4x4 burb with 3.73 gears and a 350 I used BFG AT's in 31x10.50 on it and worn out a couple of sets but I used to get between 13 to 14 MPG on the road on the average on long trip cross country with A/C. 5 year ago I went back to 235 Michellans load range C rated tires with and smooth tread and my MPG jumped over night. I corrected speedo for both tires sizes in use and I can now get a honest 18mpg with it and better at times and you can tell because it rolls so easy and coasts far better too than it did with the BFG's. Tires can have a big effect on MPG. I also have used syn oil in engine since day one (mobile one) which may help some to but I have never seen any real return for using it in axles when regualr 75w90 gear oil is widely availible. Put some 75w90 in rear axle if you have not already done so too.

swilliams1005 · April 4, 2005

Well its about that time to change the gear oil infront and back and when i wear these tires out i might go with the same tire but different tread style since im getting almost 50,000 miles out of these (3rd set)

snoman · April 4, 2005

Well its about that time to change the gear oil infront and back and when i wear these tires out i might go with the same tire but different tread style since im getting almost 50,000 miles out of these (3rd set)

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Sounds like you drive a lot like I used to but no longer do. I got 70k once out of a set of Michellans 9.50 x 16.5 radial truck tires that were traction grip too on a old J20 jeep truck I still have that is not used much. They were not fully wormn out at 70k but the were starting to break down internally with belt and rubber as they were over 14 years old too.

swilliams1005 · April 4, 2005

Well i bought this truck in Oct.04 with 87,000 on it and its April 4 with 101,000 so yeah i drive a little bit but ive been to the mountains in Nc twice and i live close to the coast and too several of the large citys nearby. So yeah i drive alot.