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Yes, please open all three drain cocks on the air tank reservoirs and tell us if the truck will still roll. Air pressure is needed to release the brake shoes on the rear axle which is the only axle used for the parking brake. If the shoes are released without air available, the mechanical...

I agree. The Lube Order calls for GO90. I prefer 140 because it leaks out slower.

1998 trucks and after are WTEC III. I cannot stress the importance of putting the "fuse block", actually "PDP", back to the factory configuration. All correct p/n relays and breakers in the proper spots. If the sockets are burned up, you may have to carefully relocate those circuits to an...

Sounds like the 3 lever switch is defective. That is assuming your wiring is not hacked up. On the headlights, verify if the bulbs are good before other diagnostics.

Still waiting to hear if the truck rolls with all air drained so at least we can eliminate stuck wedges on the rear axle as a cause.

Nope they are a gritty heavy truck wrecking yard with the usual poor attitude.

San Antonio Truck & Equipment has a bunch of them for sale. On the pricing, to add insult to injury, when these originally sold at auction, they were going for around $8000.

It's gasoline powered? Those get like 2 mpg.

Ron, you have your pet peeves and I have mine, I'm not saying the National Symbol itself is silly, I am saying total disregard for military regulations and accuracy on the part of a military vehicle collectir hobbiest is. Only thing worse would be an invasion circle added as well.

Don't see what? Silly white star and registration numbers incorrectly applied to a NATO painted truck?

The WWII version of this trailer had electric brakes, so I'm guessing the XM did not have the final version's brake setup. There is a M series electric brake controller kit that clamps to the steering column to adjust the stopping effort. It looks like a soup can with a rheostat knob sticking...

Take a look at the schematic and correct me if I am wrong. The only circuit specific to the MD3070 is the "N" solenoid, and per the hydraulic schematic, it controls a valve and not a locking collar.

The interaxle differential mentioned by snotrack is actuated hydraulically, there is a special solenoid for it.

You are golden, from a HMMWV is all that matters, you have a GEP engine. 2005 and newer.

On mine, there is a noticeable clunk that occurs shortly after hitting mode.

Does everyone still think we need the LMC relay drop in when using LEDs? The amp draw is like half of incandescent? Thanks for the pictures, the results are impressive.

Did you new engine come from a scrapped HMMWV or a GM van?

No reason you could not put two group 31's end to end in a box between the frame rails, and the tanks there as well.

Very true. If you're not made of money you can make your own in a few evenings. Erik's Surplus has the wire, original style Douglas and newer rubber type if originality is not that important to you.

For sure you need to replace it. That harness is 65 years old and could result in a fire if there is a short circuit.