Gear is no longer switching correctly??!!

Hello, wrench.

who can help me since yesterday still driven on the track on average 140 comes a funny noise from the engine room and since today my transmission no longer switches!! When I turn off the engine it goes again until about 1 km after that nothing works any more, was in a workshop the screwdriver has a liter of getruiebeöl replenished but does not go better, said it could be any coverings that are probably burned at the engine power 215,000 km yesterday, can that be who can help me!!

Thanks

alex