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Air keeps the fan off no air th fan should come on. Reverse from the m939 trucks. Maybe it's something that can be taken apart and cleaned maybe a line has some gunk blocking it.

The tm has troubleshooting step by step check this check that flow chart. Even the army techs I ask say the same for the first gen lmtv trucks. Follow the tm. I have to do it next week myself I have one that starts fine if I jump the starter relay but does nothing from the push button. The A1...

Parked it and drove the M1078

The temp sender is above the alternator if the wire is flopping around zip tie it and make sure it's pushed in all the way. Zip tie up the harness it goes to that runs across the front of the engine.

I just dont have enough experience with the trucks to remote diagnose for the overheat. Your best bet would be to follow the tm troubleshooting steps in the manual. Its at the top of the forum under current trucks. Could be something simple like a bad temp sender or loose wire. You can check...

Which tires do you have? The Michelin paddle style are agressive and make more road noise than the Goodyears. It could also be a balance issue. Especially if it comes and goes at different speeds. I ran mine fully floored for 20 min or so on the highway it was only around 78 out but the temp...

Spoke with Jeff down there. Nothing special about this truck.

I prefer driving the M1078 to my A2 5tons. It does a cool 57 1/2 mph on the highway but does not bounce around like the older trucks do. It has plenty of power for me like it is. I can easily keep up with street traffic though. I believe the Cat dealer can easily bump the power a bit if you want...

Maybe just a vibration somewhere

Bottom are of trans. It's called engine transmission speed sensor or something transducer depending on which tm you look at. Allison 29543432 is the part.

A LMTV tractor would work well for that the back has what looks like an air ride already. You could just extend the cab all the way back.

No speedo is a bad speed sensor on the trans. Its an over the counter bolt on part. I will look in my diag kit I have a cable that breaks down the big round diag connection into smaller ones. The newer diag setup is usb. The older one is a an rs232 port. It looks kind of like an rgb connection...

I did it theres a pic posted in my M1078 little mods thread. Its just a momentary switch. Easy to do.

I have keyed ignitions for them.

The a1 models have advanced diagnostics. The transmissions do wind up and bang into gear most military trans are like that. There may be a fluid pressure adjustment that can soften the shift. Changing to the Allison Dex III may help. There is a connector to the right of the column. I have all of...

GL is in bad shape they lost their cash cow the trucks and other rolling stock. Now they are trying to milk out every penny they can. Before it didn't matter it was just move the stuff out more is coming. GP gives the gov a large percentage like 74% after expenses or something like that. GL does...

I don't see how GL can legally put reserves on gov items I believe the contract specifies selling the item to the highest bidder at public auction.

It's been a while it wasn't a bad job the power steering pump unbolts and the front flange of the compressor unbolts and the drive gear stays on the compressor and just pulls out. I don't remember the gasket number you can call cummins and give them the engine serial number they will sell you...

I will post pics when I do it. The protective polarity relay isolator gets relocated under the air cleaner, alt to batt cables relocated to right side of engine and the alt is a bit larger. Pulley looks about the same. In theory one could just do a larger 24v only alternator with a 100a power...

I believe there is an inspection port on the back of the hub to check brake wear if you are concerned. I know there is on the older trucks. Bring batteries or a way to jump it. Extra breakers or blade fuses should work. Extra 12 and 24v bosch style relays. Hose clamps electrical tape duct tape...