I just got a Crazy Taxi Sitdown but the shifter feels loose. The weight of the shifter causes it to slump down and activate Reverse. For the time being, I mounted the assembly upside down so that it will hit Drive instead. I took out the shifter assembly and both microswitches for Drive and Reverse work fine. Inside the unit, everything seems in tact but is there supposed to be a spring or something that keeps it in the upwards Drive position? Also, is it supposed to hover in the neutral position? Thanks in advance.