MPG highway with premeum I have got as much as 380miles out of a tank with regular max about 280 to300 . As for the trans NOP! didn't come with a manual but 98 to 2001 Trooper came with manual trans and same 3.5 motor and also a switch to shut off the TOD . Might want to look into that. Tires anywhere u want to buy tires u can find tires for your VX.