Engine/Transmission (1994 - 1998) Fuel mileage between a 4.10 and 3.55 ratio

[PWeber]

I am just about finnished with this damaged 1996 5 spd 4x4 2500. I went underneath the rear end to check the axle lube. Noticed it has 4. 10 gears. Does the 4. 10 gears return alot worse mileage than the 3. 55 gears?

 

[moparguy]

My 4. 10 geared 4whl. drive 3500 gets 18mpg on its best day running empty.



Based on what others have posted, I'd expect to get a couple more mpg if I had 3. 55s.

 

[rjones]

Originally posted by moparguy

My 4. 10 geared 4whl. drive 3500 gets 18mpg on its best day running empty.



Based on what others have posted, I'd expect to get a couple more mpg if I had 3. 55s.

Must be nice I have 4. 10's and Im only getting 10. 5mpg:{ and its only going to get worse with the 370's... ...

 

[C. Harlan]

I get ~15 empty, and around 9. 5-10 loaded... . See siggy for details.



-Chris-

 

[Got Smoke?]

Originally posted by charlan

I get ~15 empty, and around 9. 5-10 loaded... . See siggy for details.



-Chris-

Well Chris if you could contain yourself from smoking every other thing that gets behind your truck you'd get better!:-laf j/k



I have my pump retimed and I was getting 18-18. 5 on summer blend @ 2000RPMs and below (70mph) over 2K RPM and it suffered majorly!

 

[RRevett]

I have a 1996 2X4 Auto trans with a 3:55 and the best I have got is 25 MPG and when I pull my trailer 8000 Lbs I get 12MPG and when I had my Lance camper 9 1/2 footer I got between 15 & 17 MPG I,m happy with that. and I have a #8 plate and a K&N air filter And a 16Cm housing. Bob

 

[markdixon]

I get 18-19mpg on the highway driving and my truck is a 2500 with a topper on and 4. 10 gears. Driving at 70 mph @ 2500rpm best to date is 19. 95 mpg worst empty 16. 5. It only did the 16. 5 once I think it was because I used some inj cleaner on that tank full. Went from stock tires 245s to 285s mileage stayed the same and yes I did correct the mileage for the bigger tires.

 

[jared1]

I had 4. 10 gears in my 2 wheel drive 2500 and got about 18 mpg until I changed to 3. 55 gears, now between 20- 22 mpg empty

 

[wcjp]

Empty I average 19. 5-20. 5mpg. Not sure on my loaded average. I tow many vehicles of various friends.

 

[bmoeller]

4. 10's and get 14-16. 5mpg. "empty". Truck weighs 7920# with nobody in it.

 

[markdixon]

Well I don't fell so bad with my fuel mileage after reading everyone else post. I actually thought my truck would be on the lower side of the results seems every one you see with a Dodge gets 20-25 mpg. And I don't doubt that it can be done with these trucks. But for use with the 4. 10 and 4x4 QC its a lot more difficult it seems.

 

[dhauser]

I just made a round trip from Florida to Ohio and back over X-mass, towing an 18' flatbed with auto aboard. Averaged 12-16 MPG, 70 MPH with cruse on exec pt when I punched it out of overdrive climbing hills. Truck is box stock 96 3500 Auto 4x4 CC LB, Purealator paper air filter, 4:10s. I had no better results with K&N. I have NEVER seen 18-20 even empty. IMHO either my speedo is reading incorrectly or there are owners out there telling falsehoods.

PS. Wish I was getting 20, Diesel just went to 1. 70/gal today!

Happy trucking, Dave