After 800 km at a distance....

Hello, V8ler.

I made a little trip around the world with my fat last.
When I was about 6 std. and about 800 km in a construction site from
I noticed a strong jerking going on. Not as usual a very soft transition from load to thrust operation.
Then after the construction site the same. The moment I
So when it was changing the load, it was back. I tried it a few more times. It was
like a kind of game available between load and thrust operation. After 50 km everything was over again
and the thick one then reacted very gently.
Was it too hot for him in the gearbox?
800 km at about 25 C outdoor temperature?
The whole thing has been 4 weeks and since then there has been nothing more.
I'm interested.
Have any of you ever seen this before?

Thank you

Sven