I have an 07 TD4 Auto.
After about 30 minutes running the gear change between 2nd to 3rd has a large lurch/jolt.
Going into reverse the same.
I've put new gearbox oil in but still happening.
Park up for 10 minutes clears it.
Any advice greatly appreciated.

I would try a gearbox reset can’t remember how you do it just search auto box reset on here should show you then have any codes read see if that brings up anything other than that it’s finding a good gearbox place to diagnose it .