I have a 92 Club car 36V resistor cart that I have done a 4" Z-lift, 22 in. tires, All new Excide GC110's new solenoid and rebuilt motor(brushes,bearings, & springs). All connections are good, tight, and clean. I fully know that a resistor cart is not the best for efficiency but the pedal is usually 100% to the floor. Even after a full charge it picks up decent speed on flat ground. We have a private lane that has an approx. 10 % grade that is about 50 ft. long. I am not a huge guy(215 lbs.) and with me on it It wants to barely "crawl" up the hill. Seriously, I could power walk past it. What gives??