Is it possible to make a tow bar to attach two trucks together so when a truck cant make it up a steep hill with a load you can attach another truck behind or in front of it to help push or pull.
I don't think thats going to be possible. If you have the Towing Chain installed, you should be able to connect it almost everywhere. If not, live without it.
The b series has a front hitch that can attach to other trucks i just want that as its own thing except double sided to attach two truck to a trailer one up front one behind.