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It has an onboard aux pump and can be set up to draw from an external tank to refill its internal tank.

There is a small harness that plugs into the dash harness and provides the connectors for the upper box switches and tach. It's in the parts tm. All trucks have a pickup the trans control uses it. You can drive a universal tach off the alternator regulator ac terminal.

If the other didn't sell call GP customer service offer them 50 bucks for it.

I had a truck the brakes were fine I was driving it and then I only had service brakes. And it was real scary real fast. And then the spring brakes came back and I had brakes. I had good air pressure the whole time. I had previously checked the brake function and it was fine. Tm troubleshooting...

Obviously the truck worked when it was driven to be painted. And it worked when the guy left the facility. This is a mechanical failure.

If the brakes failed to stop that truck it can ONLY be due to a mechanical fault. I suggest getting the truck to a facility that can go thru it and determine what failed.

That's probably why they are still sitting there.

The front cover is a big job. If you are taking it off you might as well put a new one on.

Air brakes do not just fail unless there is a defective component.

If you repeatedly mash the brake enough to drain the air down below 60 psi the spring brakes should stop the truck if there's not enough air to keep them disengaged. And that's hard to do with the lmtv dual piston air compressor. Sounds to me like the rear brakes were caged or something else...

Nice

I think pulling with a chain or tow line allows for a slight stretch/snatch start where's pushing you are right up against what you want to move. Moving heavy load the truck may squat a bit. You may damage your front up against what you are pushing when the truck squats a bit under load...

Yup. Usually cracked diaphragms. The haldex rebuild kit is around 30 bucks. I can't remember the number it's posted somewhere.

I have an alternator too

The A1 has paper operators manual. The parts and tech manuals are electronic only. Does the A1 truck you are looking at have v belt?

The A1 tms are not in pdf format. I have the kit new in the crate.

It does seem like alot of work for little benefit.

There is a kit to convert early a1 trucks that had v belt but that's a 3126. I don't know if it will work for a 3116.

They are nice trucks. It won't take much to get it all right. Prob just needs new batts and the regulator lead jumped to the fuel solenoid positive to provide a good 24v to excite it.

There shouldn't be any continuous air coming out of any of the rear gladhands unless you are towing and the dash trailer valve is activated. During braking and brake release you can get brief releases of air from the gladhands this is normal. That's why the fibers have small vents.