yes, it has an exhaust gas temp probe that goes into the hole that you can see on the exhaust. The lead is braided metal and it heads to the rear of the car on the passenger side. It is routed along with all the other cables and is definitely something that was fitted when the car was built. I have yet to investigate where it actually goes to back there.

I have made some progress..

www.nielsen.org/alfa155Q4/gb1.jpg
www.nielsen.org/alfa155Q4/gb2.jpg
www.nielsen.org/alfa155Q4/gb3.jpg

Now all I have to to is drain the GB oil, remove the linkages and remove the starter motor (this still looks difficult!)

I am going to make up a "carrier" like the special tool in the manual to lower the GB, and to help in putting it back in...

jimn