4.10 REAR END FOR FREE! - Diesel Forum

ISTOCK51 · 05-15-2005, 10:12 AM

Well actually to trade for a 3.73. I would like to check out mileage benefits of the 3.73s as I like to cruise at 75 mph and only tow 6K lbs. My mods are such that I have power to spare. There is a guy in Louisiana with an '01 SuperDuty who wants 4.10s. Can we just swap axles, backing plates and all so he can retain his disc brakes?

rmyers2051 · 05-15-2005, 10:49 AM

No. But you can swap gears.

ISTOCK51 · 05-15-2005, 10:54 AM

Then we will need to do setup on both. I was hoping to avoid that. What is different in the ends of the housings? Perhaps I need to find someone with a 94-97.

brahamfireman · 05-15-2005, 12:45 PM

I swapped out my 4:10's for 3:55's and when towing I got the same milage, maybe 1-2 MPG better, but I still got 15's towing, and I accelerated slower, on the open road, long trip, empty, driving I can get into the 20's but hotroding around town they really suck the fuel, 15's in town.

with the 4:10's I got pretty much the same all around, town and highway only differed by a couple MPG not 5-6 like the 3:55's.

over all I am happy with the empty open road milage, but they are not that great for hot rodding or towing.

hopefully 3:73's will be better suited then the 3:55's

Diesel Rod