Im wondering how many O2 sensors or on my 98 4.2v6? I have been told there are 4 but I can only find 2. Next question. Im looking to change my gear oil but IM not suer how to do it. My truck is a 5sp with about 70000 miles on it.
Thanx all,
Black Dawg

 

there will be 2 senors on the driver's side of the truck and two on the passenger side. the upstream sensors are located up towards the headers, the other two are behind the cat converters. at least that's where they are on my 4.6l