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First evidence I have ever seen of Marines using the M series GMCs.

Yes: JAtonkaM35s.com

I might add you need to park the truck until that is resolved, bulbs and start box will blow.

Folks come on here all the time with the issue of “my HMMWV won’t move” and more often than not, it’s CV shaft related. Didn’t know you already checked those.

Before you do any more transmission diagnostics, check all your CV shafts for missing bolts or blown CV joints.

The 4L80E should still move the truck in second gear even unpowered. Are you sure the transmission has enough fluid and the transfer is in gear?

Eh, that is a marketing gimmick by Philippine reproduction Jeep body manufacturer MD Juan.

Isn’t the castellated nut like 1.5” tall? Maybe cut 1/2” off it. edit: no it’s 1” tall and this would be unsafe

Horn button closes the ground.

You can try it but I am pretty sure it will be loud AF.

Saturn Surplus

Third’s bracket looks to be for the MTS Movement Tracking System. I didn’t think any JCB-P units were out yet. The previous BFT system mounted on the “digitization rack” behind the seat.

Here is the install using the aforementioned threaded holes.

Fun speculation: my A1 is dod 7/53, s/n 51130, so that equates to 23,000 A1s in a year, assume 260 working days on one shift, equals 88 A1s per day or 11 off the Toledo line per hour.

All the 887 derived 1031s had the gas generator/welder. The box is similar between the 887 and the newer 1031, the newer box being set up with the PTO generator and the Miller XMT welder.

Looks correct. I would remove the starter and take it in for repair. I am also concerned that the spark you got when connecting the 12 volt feed was your alternator getting smoked due to reverse polarity.

Suggest you double check which cables are which in the battery box.

My observations on the DRW SECM CUCV trucks, they all seem to have the transplanted M887 bodies from the M880 series Dodge trucks. I think Uncle pressed these into service as an expedient due to the SRW M1031s with the new shop bodies taking so long to hit the field.

Suggest you call around for quotes from local heavy haul and wrecker companies that have Landoll trailers. They can winch on in minutes and may not charge too much if the move can happen when they are not busy. United States of Freight might bite on this as well. They know how to get this done.

920s are negative ground. The starter uses huge amps so if you are connecting batteries and the starter solenoid is stuck and powering the starter, there will be a huge spark at the battery terminal when you install the terminal on the post. The air compressor is direct gear drive from the engine.