PTO operation on Dodge 3500 4x4 auto

The six bolt PTO opening is on the transfer case. I presume the operator starts the process with the transmission in N, selects N on the transfer case, engages the PTO, and shifts to 1, 2, D, or R on the transmission. I think later Dodges and Fords (probably Chevy too) have a wire and/or program that tells the drive-by-wire engine management system that the engine is connected to an operating PTO.

I suppose the fool proof gear selection is to only use 1 or R. The other two gears might be inclined to shift if the load varies. The down side to using 1 or R is the pump has to be larger, weigh more, and be more expensive.

Does my truck have a way to lock in a gear above 1st? I'd also welcome any advice on what gear to use or whether the whole notion of running a PTO on this truck is prudent. Let's not get side-tracked with discussions about hydraulic engineering concerns such as reservoir capacity, oil temps, cubic inch per revs, torque vs RPM, etc.

The 47RE trans is shifted electrically. The powertrain control module (computer) applies current to solenoids that in turn move hydraulic valves which re-route the trans fluids to activate the clutches and bands and thereby select the various gear ratios.

If you got a wiring diagram for the truck, it would be possible to break the wire connections and insert switches between the computer and the solenoids, such that you could force any gear you want. A lot of guys with the Cummins Diesel do something like this to force the torque converter clutch to lock or unlock.

Can the torque converter be switched and locked at any engine rpm?

Oil level is not a problem.

I am aware there are duty cycles, torque and HP limits. I doubt if I will be using more than 15HP. Sometimes continuously. Motors might run a conveyor, 4000W generator, winch, dump hoist, and air brake type air compressor.

I would appreciate any printed material you have. Email me and I will send my address.

Still need to know how the auto transmission will handle the variable load.

Dave

Thanks in advance for your effort to find the source for the switch.