M1123 Driving

I recently purchased an M1123 from GP. I am just finishing the titling process with NY state.

I have been reading all over about top speeds and cruising speeds of HMMWV's. I am curious as to what speed most of you guys are cruising on the freeway for extended periods of time? I have read everything from 40-60 MPH.

I want a general rule of thumb for a speed that can be run for a extended period of time without babying or over stressing the drivetrain.

There is a reason for the overlay.


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What speeds do you run at on the freeway? Not loaded down.

I've cruised at 60 before without issue but I wouldn't push it above that.

Welcome to the madness!

If your truck is well maintained , safe, and it is capable, then set accordingly.

My experience is slightly different as my stock 6.2L, 3 speed runs great. I feel very comfortable with my baja tires at 35/40. I cruise the interstate at 65-69 with no problems. YMMV and I am not aware of what I did to earn this privilege

Sarcastically, I have only driven a few times in the big apple's highways but I have never been able to go over 40 as I was probably lost and on the highways at the wrong time and my Louisiana Plate stands out like a strobe light

all the best

The m1123 has 4 speed trans....you can cruise at 65 all day long

I've run mine all the way up to 80 (electronic speedo), but its kind of scary. RWH is right 65 is the sweet spot.

Yeah with the 4-speed I run 70 for 400 or 500 miles in a stretch. I can put 1500 miles on it over a week long trip.

When I had the 3-speed in the fan would kick on every 5 minutes above 60 so I tried to keep it to 55. I never sprinted it above 65 with that trans.

Augi