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It depends on if you are full of fuel or not...:)

of course... Aren't we all?

Well a 12,000 BTU window A/C pulls ~1000W when cooling, and 40A@24V is 960W, so it may be reasonably close to 12KBTU A little anemic for a greenhouse of a cab like is found on the LMTV. Can your alt handle the extra 40+A @24v load? Have seen a few now who have gone the rooftop A/C-inverter...

You can also fit an ex brake to the A0…

The other two 2way checks inboard of the drivers step below the park 2way? those interface the front blue glad-hand to the pri&sec service brakes, so a towing vehicle has control of the towed vehicles brakes… i covered some of the operation in my front glad-hand delete video on utube

you can only have VENTED covers on the front glad-hands! IF YOU HAVE SEALED COVERS ON THE FRONT, that is part of this problem, a leaking check valve(directly below red glad-hand behind bumper) to the wet tank feed would be the other part.

From the park control in the dash, a line runs down to the floor forward of the brake pedal/steering column. If you remove the grill you will see that it runs over to one input port of the top 2way check valve up behind the drivers step. the other input is from the front red glad-hand. The...

The TC in the allison locks in 3rd and above 100% of the time and does all shifts with TC locked. Somewhere in 2nd when downshifting it unlocks the TC. have one person report maintaining ex brake and TC lock when manually shifting down to 2nd until ~10MPH. 3-2 is a large ratio step, and the...

Holy @#$% !

Check your messages(letter icon top right of this page)…

Sort of. I have an old FL-50 ambulance at work with a cummins and a WTEC2, that has that round trans diagnostic plug… Or its a 3 with a 2 control pad:)

I think the drawing is a little off, which is not out of the ordinary for that manual, but I am pretty sure that is the same 6 pin Deutsch test plug that we are familiar with. The 24P identifies it as J117. 48 PAOZZ 19207 12421844 .CONNECTOR,RECEPTACL (J117)........ 1 and a...

Well with Allison doc you can program different target and max RPMs, but if you have 2:1 hubs/7.8:1 axle ratio, it probably won’t shift any smoother until you put 2.5+ tons in the back… The Allison is constantly learning/refining its shifts, its base program looks at the engagement speeds and...

It appears to be in the 24P manual(they both are deutsch and GM connectors)… In the end they use the same 4 pins. +DC, Ground and two serial lines

Pulled my muffler for my “stack”, straight out the back:), Re-arranged my air dryer and wet tank plumbing for the hydraulic pump and habitat box install… have been thinking that some driveline hoops might keep a failed DS/U-joint from wiping out a transfer case…

they still call it J117, same as the old GM connector. Its on the WTEC3 interface page(shows the panel relays used in place of the VIM) in the A0 schematic…

That 6 pin round deutsch plug is an Allison comms option for WTEC 2 and 3, besides the GM dual inline connector the earlier A0 trucks came with… I have both the GM and a round adapter for my pro-link. Also have a FL-50 ambulance at work with a WTEC2/cummins and the 6 pin round plug…

The center differential lock in the transfer case (goes from 70/30 AWD torque split to 50/50 4WD) is accomplished directly by the transmission when mode is selected. The TCU outputs a signal to power that second solenoid under the dash that feeds that 1/4” line to the power divider differential...

It locks the power divider, which is basically a center differential between the axles, like the center diff in the transfer case is a differential between the front and rear axles on a 4X4(or a 6x6). Basically when not in mode if you lift any single tire, all the torque can escape thru that...

it could be a PPD issue, but I doubt it as is just a set of diodes and quite robust. The only issues I have seen with them are due to corrosion at the terminal studs as it is out in the weather. Don’t recall a diode failure. Clean all those therminals… The A0 manuals are available here on...