2005 Club Car model PQ. Just replaced batteries in an un-known used cart that I traded for...batteries solved basic problem but as I test drove the cart for the first time I noticed a continual fairly heavy rub with a light clicking sound...this occurred in reverse and also continued as I flipped the switch to forward...the cart drove at full speed with the noise always present and somewhat diminished at higher speeds. It didn't seem to effect the ability of the cart to go fast...just the noise was always there. I know Club Cars have had some axle failures...how would you determine the problem...? Please advise my best option.