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The operator's manual makes it pretty clear that it is the recommended procedure for towing the HMMWV that any wheels on the ground require the prop shaft to be disconnected.

How does the air filter restriction gauge on the dash look? White smoke can also be an excess of unburned fuel, and lack of power, especially under load, could be something as simple as a dirty air filter, or the mushroom cap over the air intake pushed down too far restricting air flow.

What color is the smoke? How does coolant level/color look? Any signs of water/coolant in the oil?

if it isn't an immediate need, then ordering from an OEM vendor is usually preferred, as they tend to be of higher quality than auto parts store import parts. Not always the case, but very common

I just looked up the one at HPG, used that part number in Napa's site, and only one option came up. Said it was for a few years of H1 that match what HPG says the part was used on. All the A2 variants use the same 12" rotors, and my truck is also an M1123, and I've replaced brake parts several...

Should be this one https://www.napaonline.com/en/p/NB_4886946 https://www.hummerpartsguy.com/ROTOR-BRAKE-VENTED-121-GVW-12_p_4203.html

There was a mod in Iraq involving adding some electric fans to supplement the regular cooling system because honestly the HMMWV cooling system kind of sucks. It helps out in extreme heat, and would probably help keep the regular fan from coming on as often in lower heat conditions...

Or just do away with the plastic tank entirely and buy one of the aftermarket aluminum ones. They used to be about the same price as the real coolant tanks, but I think someone got rid of all the competition building them somehow and upped the price. As was just pointed out, too bright of a...

Depends on the towing vehicle. Yes, it is definitely recommended that you disconnect the drive shafts at the differentials. Take some tape to hold the u-joint together and some straps to hold the shaft up out of the way. (I haven't seen the tape mentioned on any of the threads where people...

I think your laser thermometer is a lot fancier than the ones we're used to. You don't need it exact; all you are trying to find out is if it's close to where it should be or not.

You mean this? In my defense, the truck is rated for the weight, and the center of gravity was a couple inches in front of the rear axle. The only thing nobody liked about it was the rear tires hanging off the back, but there are 8x12 blocks of wood supporting the frame, so very solidly...

Also, doing a little research, unless you have an RV based on the Sprinter 3500XD chassis, you're limited to 5k lbs towing, so you are already above that even with the most basic stripped down HMMWV model. Not sure what 20k flatbed trailer you have with your F350, but it's definitely better...

Any room to bend the line a little bit?

And not to beat a dead horse, but trailer ratings include the weight of the trailer itself, so even if it's rated for 7k, it might not be big enough for a 6k lb truck if the trailer itself weighs over 1k (and for that rating they usually do)

The soft lines along there are fuel return. They go from injector to injector. They do age and need replaced, so not an uncommon thing. They are very low pressure.

Depends on the actual trailer ratings, but if it's loaded with good weight distribution, sway shouldn't be an issue. For u-haul trailers, it would depend on the trailer weight rating for how safe it is. A lot of them used in the rental industry are underrated compared to their component...

Mildly off topic: I spoke with one of my customers up here last week. Her son is down in Georgia, and finally decided to buy a generator this year. Day before the hurricane hit, he finally had an electrician do the wiring to hook it up to the house panel. A week after the storm was over he...

Even if the breaker is tripped, the vehicle should still move in 2nd gear and reverse in limp mode. How long did it work again after resetting the breaker? Did it work until shut off, or did it stop working while you were operating the vehicle? These are supposed to go into limp mode when...

Do you have voltage going into and out of the relays? Also voltage into and out of the breaker?

Use a laser thermometer to verify the temp. As long as the fan comes on, the temp drops, and the fan kicks back off, then everything there is good. Oil pressure senders/gauges for these seem to be all over the place, but as long as it has oil pressure showing on the gauge and it goes up and down...