Ram 3500 MPG test
The Ram MPG test video. Wasn't expecting that big a difference.
Forum Discussion
Cummins12V98 wrote:4x4ord wrote:Cummins12V98 wrote:4x4ord wrote:Cummins12V98 wrote:
4X I did lockout 6th on my 11 DRW with 3.42’s. On flat ground the mileage was the same at 62. It performed better overall leaving it in 5th. No down shifting on hills that way.
Mor important would be to know what my RAM would be turning if I had the same geared trans as the Ford 10 speed with my 4.10’s at 70 mph.
I'm not understanding what you're asking. The Ford 10 speed has a .632:1 gear ratio in 10 th gear .... same as your Aisin in 6th. So if you swapped the 10r140 for your Aisin it wouldn't change your 70 mph engine rpm.
Ah I did not know that. I assumed it would have been running lower rpm than mine.
So one more question. Did the ford have 4.10’s?
The Ford had 3.55 gears and slightly smaller tires .... 31.5" vs 31.8" for the Ram.
Makes sense that it would get better mileage at 70 turning less rpm than I at 2,000.
Supports my logic that after owning a 11 DRW with 3.42's and now 4.10's I would buy 3.42's and AISIN even towing my 35k combined.
If the RAM had 3.42's on the test it would most likely get similar mileage if tests were ran the same day.
How much do you think lowering your rpm while towing heavy from 2000 to 1670 is going to save you on fuel?
You can get an idea with your unit .... When you're towing heavy simply set the cruise at about 60 mph (about 2040 rpm) in 5th gear for a while and use your trip odometer to measure your fuel economy, then leaving the cruise set at 60 shift into 6th and let the engine drop down to 1670 rpm and reset your trip odometer to measure your fuel economy. If you test over the exact same section of highway you'd only have to measure for a few miles each time and you'll have a very good idea. (Even if the trip odometer isn't 100% accurate it should be out about the same % both times)
