>Sir,
>
>If you're concerned with fuel economy on a 6 X 6,
>.........well........maybe you should buy another kind of truck. You
>see, for example, the M-135 has 6.17 : 1 differentials, it weighs
>almost 14,000 pounds and has a 130 Hp engine. It "likes" to run at 45
>MPH but with no load and a strong tail wind it can do 55, its going to
>take several hundred yards (1/2 mile?) to get up to that though.
>
>Please understand, though, in 1952 that was a fast truck and,
>technologically, ahead of its time. It had an automatic transmission,
>unheard of in a heavy truck (at the time)!
>
>Mileage? Depends on the driving conditions and load.
>
>Don't forget that the Low Range position for the transmission will
>DOUBLE your fuel consumption! Its a 2 : 1 reduction.
>
>Joe F.
Fellow Listers,
Please, let me just add a few things. They(M135/M211)do like to comfortably
run at 40 to 45 MPH, however, I have had mine up to 60 MPH with about 3000
pounds of steel in the back. I only did this one time to see if it would
actually top out on the speedometer. I had a chase car to conform the speed.
It was also done on a relatively level highway. From about 50 MPH or so, it
seemed like it took about a mile or two to reach 60. This is probably due to
the approach of the limit on the engine r.p.m. which is at 3450 + or - 50
r.p.m. At 45 to 50 MPH gas mileage averages about 7 to 10 MPG empty.
However, I would assume that the M135 would have an easier time getting to
60 MPH and have a little better overall gas mileage. This is due to the
11.00 x 20 single tires Vs. 9.00 x 20 duel tires.
If you check your manual, TM9-8024, page 338 under section 193 Description
and Data. The actually reduction between high and low is approximately
3.82:1.
If you wish, I can scan in the page and do the math for anyone who's
interested.
Thanks for your time
Ken
Lone Star - MVPA
1953 XM211
1954 XM105E3
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