92 735i - Governor valve

I am having trouble when driving, the rpms exceed 4k then shifting to second gear and I've been reading about it being the governor valve that's the problem.
So this weekend I'm going to remove it and clean it. Can someone show me what it looks like or explain its exact placement?

Also while I have the exhaust completely removed, is there anything else I should clean/ inspect while in down there??

Well today I took the transfer case off my spare transmission to get this little black speed sensor out realizing i only needed to remove the pan and two screws holding it in there in the valve body. then i proceeded to remove the pan off the transmission in my car and swapped out the sensors. the one that was currently in my transmission didnt look right like its been replaced before. so i took my original one from the spare transmission which is a cylinder thats black and round with a silver dot at the tip that looks like a house plug on the end of it (confirmed by an auto shop to be the speed sensor.) I then noticed the plug going to my transmission was loose so i unplugged it to confirm there was no oil in it and plugged it back in till it clipped in. I then refilled my transmisson and tomorrow i will test drive it to see if I fixed the problem.

the sensore is on the bottom left where the pan is. you cant see it here though