[remy_martian]

I thought those things weren't street legal?

Anyway, Google & eBay -- did you bother to look?

 

[remy_martian]

Yeah - I agree the (large) Tesla drive unit would tear the little truck apart.

I'd replace the 9 inch motor with an 11 inch, keep the trans, toss a few more batteries in, buy a ready made controller and Bob's your uncle. If you really wanted to get ambitious, you could replace the rear diff, but I wouldn't mess with it.

OR

Use the *small* front drive unit from a Tesla, but now you have a headache for controllers, wiring, deadly voltages, etc. And nobody says the truck can't be front wheel drive...

As an aside,

" The only system that is publicly sorted out for re-use, (Documented) is the Tesla Model S system"

All the CAN messages are documented somewhere?

 

[remy_martian]

There's a 100kW Rinehart brushless DC controller on eBay right now. 100V min voltage.

With that, get a BLDC motor to adapt to the transmission and then add battery as needed.