davo32683

iTrader: (5)

I have 3.31s in mine and my computer hangs around 17.9 MPG all the time. I do a lot of around town driving though during the week.

If I reset it on some back roads with no stop lights; etc and a 55 MPH speed limit the computer stays around 23.7 MPG

Kenferg1

I have EB Screw 4X4 with 3.31. My current average on the B trip odo is 17.8. This last trip I took (over 1K miles) with weather & headwinds averaged 18 mpg at between 65-75 mph from E. TN. to Northern Indiana and back. I have a travel trailer that weighs in about 6K pounds loaded out that it pulls without any problems. I'm not too concerned about having a locking rear end since the TC takes care of slip issues with my type of driving (95% commuting). Thus far, I am happy with the set up.

abovetreeline@gmail.

The conversation on this topic is exactly what I'm looking for but I need it in reference to v8 5.0. Would someone please advise me for 5.0? I have a 4.2 xl 2001 4x4 that is too week to tow a 1000lb trailer from Denver up into to the mountains. The most towing I ever do is a pallet of bricks. 70% highway miles at elevation no load. Shopping for 4x2 5.0 xl 6.5 bed 2017 / 2018. Thanks.

Thugzy

With the 10 speed trans, a low rear end (higher number) is almost irrelevant.

If you are looking at the 2017 5.0 get the 6sp/3.73 rear end. I have a 2015 and
it is the best combination.

If you are looking at the 2018 5.0 get the 10sp/3.31 rear end, as the 1st and second gear will be equivalent to the 6sp/3.73..... it will be way more for what you need. Unless you are planning to get a lift and huge tires, or tow to max capacity, you dont need the 10sp/3.73...

zx12-iowa

mountains? eco is a far better choice. but even the 5.0 will be a huge improvement over what u have. in mountains a 5.0 would really benefit from 3.73 gears - it will have to rev to get the power. an eco would rev far lower and fly up those hills.

JLTD

In flat terrain that may be true, but in the mountains the 3.31s will make the upper gears worthless. Ratios will help hold a higher gear.

With the 5.0, isn't the top gear or the 10 speed even more of an o/d than the top gear of the 6 speed? I know that in my 6 speed with the 3.55s going up the mountains at high altitude even on a mild grade, it will drop to 5th or even 4th at times....can't imagine how bad it would be with 3.31 and the 10 speed - it probably wouldn't be able to use the top 4 or 5 gears.

Mountains and altitude are way different than level terrain or rolling hills below 2000' elevation.


I've recently moved away from the Denver area (much to my chagrin). Running along I-25 to Colorado Springs the 6 speed would shift down to 5th gear frequently at 70mph. Headed up 70 into the mountains makes use of 4th as noted above. I'd get the 3.73 in your position. (and 4x4...but that's another discussion)

ranken

My 2018 5.0 has a 3:31 e-lock rear end.

69428SCJ

10 year old post...

69428SCJ

You're responding to a post that's 9.5 years old...when 3.31 e-lock was not available...10 speed auto weren't either.