We have A 2007 club Car 48 volt . it was running slow and the 2 batteries after testing tested bad. we replaced all 6 , inspected the system, cables , connections etc, all looked good . The police who operate this patrrolling the parking lot, says that it`s no different than before and that these new carts have A computer chip or module that won`t let it go fast because it programmed itself in the slow mode. I`ve never heard of such A thingbut I thought I`d run it by you just in case. The batteries measuring across the 6 battery spectrum is 52.5vhelp !!