I have just bought a RV and would like to pull my 2008 Tacoma 4x4 automatic, but I have been told that it has to be trailered or a possible oil pump for the tranny. Is there a compatible transmission that I can install that would allow me to tow with all four down?

 

As far as I know there is not but then anything can be built with enough money

Another option might be to install manual hubs on all 4 wheels another expensive option

Pulling both drive shafts more work then most would want to do..

That is the only few things that come to mind if you want to flat tow

Why do you not want to pull a trailer just curious ??