Man jumped in cart today and have a weird sound coming from either my drivers side wheel or the rear end itself. Sounds like metal rubbing on metal. I don't think its the hub as I have replaced it 2 yrs ago. I can't remember if there are bearings in there or not??? Thanks in advance for any insight of what this may be,also the cart itself does not roll smoothly, it surges when you drive it,if that makes any sense