# gas mileage -- 3.54 vs 4.10 rear 2500 dodge 360 v8

I'm towing a lighter camper & was thinking about changing out a 4.10 to a 3.54 rear for better mpg (what difference can I expect?) . Cost
involved for labor parts? thanks
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Figure \$500-\$600 per axle for parts/labor (remember that on a 4x4, you have to do both axles). You can also reasonably expect about 10% better fuel economy. So - pulling your trailer, I'm guessing you're getting maybe 12MPG? You'd get an extra 1MPG out of the gears.
Figure you're paying \$3 per gallon of gas, so right now, you're paying \$0.25/mile. With the higher economy, you'd only be saving \$0.02/mile. It would take you 50,000 miles to pay for the new gears.
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Lol .. I was just setting up a spread sheet to do the calculations after I knew what the percentages are ... and you figured it out already. Yeah, seems like I will stick with what I have because I pull a camper 6-9 times a year with an average of around 2K mi/yr.. Thanks !
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Do not assume the 3.54's will get you better milage. When I went from 3.55 to 3.92 my unloaded intown type driving went up 2 mpg. My unloaded highway milage went down 2 mpg. Towing a car trailer/medium sized car on it got about the same but the truck pulled it noticably easier with the 3.92's.
Denny
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HTF can anything that your wide ride is in, possibly be considered as unloaded??? Geeeesh...The trailer must have been used to haul your food for the day on. <BFG>
Oh, nice touch on the Bubba and the valentines dinner. I picked up on the WC. <G>
Roy
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Not as good as you usually do but it's better than nothing..........

Thought you might like it... <BG>
Denny

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I put front brakes on my truck last week. I get lifetime warranty brake pads so this should have been a free brake job. The last one to have the wheels off was discount tire when I bought tires. On the front wheels I found 7 stripped studs and 6 bad lug nuts. Only 6 bad lug nuts you ask? Yep. The left one of them off. Good thing it's a 3/4 ton or I would have only had 3 good lug nuts holding the front wheels on. I took the hubs off and carried them in to NAPA to have the studs changed out and the rotors turned. The rotors were worn almost to the minimum thickness. I decided while it was apart I'd replace the hub that I split open 30,000 miles ago. My free brake job turned into 7 new studs, 7 new lug nuts, 2 new rotors, 1 new hub, and 2 hours of shop labor. I'm afraid to look at the back wheels. Discount tire sucks.
--
Ken

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Discount tire isn't the one that sucks, I'm sure there are some decent people working there somewhere. But it is the responsibility of the mgr. to make sure his people are doing a good job.
Denny
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Denny wrote:

I feel it's the responsibility of Discount Tire to hire competent managers and have an effective safety and training program. Discount Tire obviously failed in that capacity. What they did was dangerous. They knowingly gave me my truck in an unsafe condition and hid the damage from me. I feel lucky to have discovered it before one of my front wheels came off. I'm driving it to Pennsylvania today. I'm not sure I would have made it if I decided to do that brake job after this trip. See you guys in a week or two.
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Ken

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