backwards tranny?

the tranny is in the normal position it's just the motors that are now in the rear on top of the esc location and the pinion faces the front instead of the normal where in it the pinion faces the rear of the truck when i tried to install the titan motors to test it out it ran backwards now i don't know if i should reverse the installation of the diffs internal or just flip the whole casing what will happen to the pegs of the the diff casing that attaches to the bulkhead i don't think that if i flip it it would fit into the slot or will it?