I can't speak on behalf of the range increase, but I did upgrade my 2000 EZGO TXT from 36v to 48v. I put in 6 of the T875's, new solenoid, Alltrax 400 Amp XCT, 6" lift kit and 23" wheels. 73124-g08 2.5 HP 36VDC stock motor in the cart. Upgrade process and and performance
improvement here on YouTube. Let me know if you have questions!