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I don't think this has been discussed. We all know FMTVs apparently can run and drive with water to the top of the cab, from that infamous National Guard utube video. The TM says 5 feet WITH exhaust pipe extension. Who has ever seen one of those? How deep WITHOUT extension? Any opinions? I...

Welcome. There is no proportioning valve. Your steel lines are plugged with goop. Plan on replacing them.

Now you know why Uncle excessed the truck. Nobody had days to spend chasing this issue. Should be fine now, you can operate it normally.

Sounds like your pin is not there. I have done this adjustment a few times, and the pin is always there bobbing around as the engine runs.

If the LBCD checks out, next downstream is the power distribution panel, which was soldered with RoHS solder and is subject to intermittent connections.

The device under the spare is called the LBCD (Load Battery Control Device). Search that term under the FMTV forum will bring up what little is on the internet about that device. A post by suprman has a schematic.

Bypass it, it is intended to protect the circuits in the event that the batteries are hooked up backwards. I think you can "double lug" the cables on one side of the device.

Look for a device with heavy cables going in and out. It has been known to have intermittent connection issues.

Next, check for power in and out of reverse polarity device under the spare tire.

"Dash stays day", what does this mean? Check the solenoid by the batteries. Control power to it? Power out of it?

That is certainly a quality control issue, but as far as the truck is concerned, the mismatch is allowable as the transfer case has an inter-axle differential. When HL or LL is engaged, the inter-axle differential is locked, and if you are on a high traction surface, the truck will pop and jump...

Got the crap crack prone GM 6.5 engine. Pass on that all day.

See the other thread on this subject. In a nutshell, GP is stockpiling the inventory while they set up the retail quantity marketing strategy designed to realize profit previously enjoyed by businesses such as yours.

Welcome! We can help you figure your M38A1 out. Behind the drivers seat on the sponson, there is a bracket, are you thinking this is for propane tanks? If so, that is not the case, that is the MT-299 mount for the VRC-10 radio set. The tube attached to the carburetor that has copper lines is...

I would think the FD put the non directional on for stability in rough terrain with the water load. Very unusual for an A1 to be retrograded to duals by the military. Good luck fixing the 855. It's a big motor to be swapping.

This topic is worthy of it's own thread if there is not one already. It is conceivable as the 800 series began deliveries in '69, but personally I have never seen pics of one. The older M39A1/A2 series seems to have been used exclusively.

Others here need to chime in before you replace anything, but I believe the protective control box is to blame. The alt is ok.

See if voltage is present at the alternator excite wire with ignition off. If so, the draw is from the alternator, but is the normal draw. The protective control box may be sending the power when it is not supposed to. I really don't think installing the LEDs is related. With the master...

Are you using flaps? You must or this will happen.

Agree, transmission is not for your Jeep or should I say Jeep salad. I see a M38A1 body on a CJ-2 frame.