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What kills this concept is where Banks put the battery. It uses up the entire cargo area. Most EVs have the battery slung low in the middle of the vehicle between widely spaced frame rails. The HMMWV has narrow spaced frame rails so no huge battery will fit there.

Is this truck powered by Cat C15 or 8V92TA with DDEC?

Auction trucks that have been “cannibalized” typically get that way at the DRMO “cann point” and not when in GP’s possession. Of course people can steal stuff when nobody is looking and trust me that happens.

Seriously? Nearly every HMMWV in civilian hands came through GP. Maybe a few hundred through GSA and a few hundred through GL. If you bid on and win a HMMWV from GP, and pay for it, and show up at the yard, you are going to leave with whatever you won. And yes, Yermo has to do a lot of...

Bummer. Top of engine looked all buttoned up, wonder how rain got inside. It's a GEP engine, those are worth repairing. Mine had water in it too, had to sleeve two cyls due to pitting.

Sold today for $49,000 after fees.

I’d be reaching for JB Weld. Clean it super good first. You could braze it too but that’s a pain.

Suggest you tighten line first off and see if that resolves all your issues.

Yuck

There is no military manual that describes the engineering of the 4L80E transmission, the design and the software is proprietary to GM, the Army just cares that it works and how to fix it. Surely however, someone on the internet has reverse engineered the transmission and has your answers, just...

The second picture in post #11 is the S250 shelter carrier frame. Looks like the generator frame attached to that.

Funny, the old Hydramatic GMC deuces would do that too, the reduction unit would get the planetary locked and engaged at the same time. In your case, I think the problem is electrical. I suspect the TCM is commanding a clutch and band at the same time. I would send the TCM off to make sure it...

Parts that might be smoked due to reverse polarity: alternator, alternator regulator, TCM (transmission controller located with keypad), transmission VIM (vehicle interface module located under PDP power distribution panel).

Ok. You mentioned batteries were disconnected for charging. Is this correct? If only the single battery was reverse polaritied, then that battery is shot. Check both batteries for voltage to start with.

Use search, term “historical” by author “carnac”. Only non winch trucks have entries.

What year model is the truck? Need to know that to diagnose what all to look at.

Resistors fail open. You will see that voltage if numerous glow plugs are open.

No unless you get to hopping and you don't let off. No more than 2600 RPM.

Your radiator core could be plugged up. If you are not getting compression bubbles through the radiator, I would have the radiator rodded out.

In