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No, there is no reason you cannot pull the PCU valve and the lines. CTIS does nothing until the PCU is sealed AND pressurized, so without a controller it is not an issue. The air supply line to the PCU is Td to the fan control air valve right where it comes thru the floor, so the port on the T...

Pressure specs for the idle RPM clutch tests. the C6 test port is towards the rear of the control module…

Yep need the wire numbers, couldnot find those TL numbers referenced anywhere.

Not the transfer case, its the transmission. It sounds as if your C6 valve is stuck open. It operating normally only in first is a important clue. That is the only place the C6 clutch is used. If it is engaging all the time you are trying to apply 2 gear ratios simultaneously, effectively...

Well if they are not designed for it, we are in trouble, as the stock A0 is capable of 6600LB of thrust per wheel at the tire, or 26,400lb of total pull from the tires… The vehicles themselves can weigh far more than 26,400lb, all supported by the exact same hardware exposed to driving...

Having had to do my share of extracting stuck vehicles, I have found I would prefer to not dig, roll around in the mud or crawl in or under vehicles mired in the muck. The problem with cribbing and jacking is it needs to remain perpendicular to the lines of force. Now simple is not always...

I have seen something similar used in search and rescue. The hard part might be pulling the stakes out when you are done…

I think the "bush-winch" methodology has a lot of potential for our vehicles as it also provides a type of traction control with the wheel that wants to slip putting more load on the winch line and transfering more drive torque to the wheel that is not slipping...

Force/energy tends to take the path of least resistance. There is less earth pressure/resistance above the disc center than below when pulling it horizontal, as the upper earth has only its weight/air to push against(its more fluid than solid). So the soil on top will push upward, and provide...

The problem with jacking is it can take a pretty large sole plate(several sq/ft) to keep the jack from sinking/provide any meaningfull lift. Then there is getting to a suitable jack point while the truck is belly deep, same with chaining up a buried axle...

Clean up the pitting on the disc and contacts, and it will probably be good for years...

The problem with a disc, is connecting to the center WITHOUT a rigid lever arm, means that it will need to be buried completely with a channel down to the disc center. Even then that is no guarantee. since it can pivot where you attach to it, it may push up the soil above the pivot(path of...

And that is the question, how much pull do you need???

Ok, if the transmission powers up, press the up and down arrows together to enter diagnostic mode. The display will flash D1 then two sets of numbers and repeate this sequence. Write these down and note if the mode light is lit(indicates a active fault). press the mode button to step thru the...

Well thats weird. I suspect if it were a pressure issue it would have issue engaging in 1st and mode, but since it engages in 1st and NOT in mode, this almost sounds like a programming issue… your gear range drops to 5 when you select mode right?

Sure you were getting a complete circuit thru the coil? Getting them to energize when not fully installed is not always straightforward…

Well the charging backwards is one issue, but this almost sounds like the batteries were not installed correctly. Define “tested as ok”. Voltage, or voltage under load. Do they pass a CCA test? Not ok untill it holds a load with acceptable volt drop. as mentioned, check connections...

Hmmm. Engages in 1st, but not in mode... thats weird as the signal comes from the same place. first off, how are you determining that it is locked or not? The center dif valve is in the transfer. The signal for it as well as output speed sensor run thru a cannon plug on the front side of...

What do the aluminum tags say?

The anchor can be the hardest part... that is one reason it is best to not let it get too dug in before you figure out how to lock down the slipping wheel. The shallower the hole the lower the force required to pull your truck out...