I've owned many gensis trucks and these things can be alittle complex to figure out to say the least.I've had ordered 3 trucks at a time just to keep one running then sold parts on ebay to get my money back.I've experienced glitches,bad trans,bad servo's,bad motors,but over all with they are so fun to drive when they are up and running.The 3 speed trans is amazing.the speed of the truck is amazing and power to say the least.(note) is vary dangerous though to say the least, so make sure you have anything right and do all pre-run checks.if you see anything that raises your eye don;t start this truck.I no that all nitro cars are not toys but this one can vary easily have you in court.I've hit my shed on time and about run though it and it is made with 1 in would and metal.Buy the way did about 150 dollar worth of damage.Also I had 2 trans 3 speed that have something wrong with them I willing to sell for parts if some is interested in them.I will take 25.00 plus shipping cost.