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Edit, we posted together, you can certainly do it Smike740's way too, but here's how i did it: The trans cooler does not have to come off, that is, you do not have to disconnect trans fluid piping and drain the transmission fluid. But, you do have to drain the radiator if done this way...

Wow, what a mess! That is some fine de-beader engineering and fab!

There's too much mass in the wheel, hub, portal gears, and axle for the impact gun to do any good loosening the diff pinion or rear of transmission. Dragging the truck back and forth will be more successful. This is a head-scratcher.

You might have a treadle valve (foot brake) leaking when depressed. The rush of air out of the vent up front (center line behind grill) has to source through the trailer or truck brake valve on the dash so sounds like it's leaking in the dash. Been there done that. Had dirt in the treadle...

I'm just guessing, like others are doing, but my take on this is that the batteries are dead and only showing around 12v total, in series. That automatic charger is thinking the battery (total) is 12v so it stays in 12v mode. Perhaps the batteries have to show close to 24v to make the charger...

Great news that the engine turns over. There is a mode of failure in the U-joint area we have not mentioned. If any of the 6 bolts on the transmission output flange have backed out, considering they are inside the ball of the torque tube, a loose bolt can lock the driveshaft. Never heard of...

Yes you can do that. The two trickle chargers should have isolated grounds just to be sure there are no surprises, like if setting both chargers on the deck of the HMMHV. It is better, IMHO, to use two 12v chargers on a 24 v system because there will be a little mismatch between the...

Why would you say that?

Good planning on the brakes. Even if you remove the collar (two halves) on the torque tube, there is still no access to the U-joint without moving the entire torque tube and axle assembly rearward. The U-joint is inside the ball of the torque tube. The axle has to move rearward far enough to...

You have already done the things I thought of! Being able to shift into all six gears rules out the lockup due to crossing the gate. Even with a bad torque tube boot (the one behind the transmission) there should not be a locked U-joint. If the grease fitting on the rear torque tube swivel...

From your testing, the diffs are both unlocked as you stated, but transmission may not be in neutral as you thought because, first: if the front end allows one tire to spin with one tire on the ground then that verifies the 4wd gears in the rear of the transmission are not engaged. Therefore...

This works for me: http://www.steelsoldiers.com/showthread.php?155445-An-alternate-way-to-lock-your-FMTV-doors

Since acquiring the M-1078 well over a year ago the transmission lube has been tested 3 times. Maybe this information will be interesting to others with these trucks. The only materials that showed "interesting" levels were Copper and Iron. (values in ppm) 7/15/2015, iron 38, copper 153...

Since the fan system is sorta fail-safe, if you got an air leak the fan clutch would lock. So, you could stimulate the fan to come on by loosening it's air hose, and drive home. CTIS related? IMHO no.

Mine was intermittent like that until I replaced the solenoid in the upper right of the passenger kick panel area. The 'slug' in the solenoid, which has little valves on each end, had extruded into the plastic valve seat and would sometimes stick there, not allowing the fan to come on. You...

With so many types of trucks even on SS, and unlimited options on campers, this is a very personal decision. Lots of options online. We just have to put on our big-boy pants and set a personal goal. Changing a goal is not an issue unless Money has already been spent, or a few hundred people...

Coach, glad to hear your truck is ready for a camper!

Couldn't a bad half shaft u-joint cause the vibration and clicking?

That looks like a very nice antenna coupler. What antenna are you using with it? I have an AT-1011 that I mount on a portable base when camping (height up to 32 ft), and use an LDG tuner with it. The mobile HF whip is an AB-15 with up to 4 sections of MS-116, etc. But, it catches on limbs in...

I suggest you kept them all in Texas! :-)