Circuit problems, reverse motion does not go in

Moin people, since I didn’t find anything here, I hope someone has an answer or an idea. At the moment I have problems with the return gear, which I rarely get in. First gear also has a kind of resistance. But as soon as the R gear goes in, it goes butter soft. Then you switch to the fifth or third, and the game starts from the front. Just kicks up when the engine is started. Since I don’t have a pole, so no sockets and the whole by rope works, the idea with the sockets unfortunately does not work. BJ. 2001, 2L petrol. Hope someone has an idea.