This is an aluminium support that attaches to the lower battery tray and supports the middle of the gearbox allowing it to pivot in the middle. The sides can still travel up and down as the suspension moves, but it eliminates the whole gearbox wobbling and jerking up and down under acceleration and braking. 

If you have a 3D printed parts like this that has worn out and broken over time, then this is a very durable replacement.

Instructions are supplied, two 3mm holes need to be drilled in the lower battery tray.

Auction is for the support and hardware only.