I'm going to change the gearbox in my Savage XL Nitro, because while the engine is running the wheels had no power. It does have reverse installed. I opened the gearbox, and sure enough there is a gear inside it which used to be connected to another gear, but it has been ripped off. there is reverse installed on it, so the question is should i remove the reverse? and if so, are there any other parts than the actual gearbox itself i need? when i started it after 2-3 years, the idle is quite unstable, if that provides any more information. also, there is a small gear between the reverse module and the gearbox which has been shredded apart. here is (hopefully) a picture of the gears that are malfunctioning inside the reverse module. also, as you may have noticed, i am a bit new to this, so bear with me.