I'm certain this is a cluth issue but not sure if it's the primary or secondary. The sled runs strong but when you take off at a normal speed and start moving it will shift down while your going 5 mph. You can actually feel the shift, it's not fluent like it normally performs. Also, when you hammer the gas it acts like its overloading the transmission as it will not let the rpm's ramp up. This only happens if the track hooks up well. If the tracks slips it doesn't miss a beat like it normally would. Thoughts?