Abstract: An assembly (10) for interconnecting the throttle and transmission whereby the transmission is locked in neutral for shifting from gear to gear unless the throttle is at idle. A guide member (22) engages opposite edges of a slider member (12) on the front and supports an actuator (18) on the rear. The slider member (12) has a hole (20) therein for receiving a locking pin (16) to lock the slider member (12) in the neutral position. The locking pin (16) is biased out of engagement with the slider member (12) by a return spring (44) whereas a compression spring (48) allows lost motion movement of an actuator pin (46) relative to the locking pin (16) under the force of a throttle moved cam (54) when the locking pin (16) is in abutting engagement with the slider member (12). The slider member (12) and the cam (54) may be connected to the transmission and throttle respectively by motion transmitting cable assemblies.