Made a call out to Norm the fellow whom I apprenticed under, the proper snap ring pliers to use are made by Snap On part number SRP1C. He said the older pliers work best but of you break them you'll get the new version.

With better lighting to see deep down into the case I managed to get that nasty snap ring out, there's another large internal ring to come out next and it's a bit tricky. Usually a wide blade flat screw driver placed between the ring and case with a slight twist brings the snap ring free from the groove, this worked on the turbo 350's but the 4L60E has tighter tolerances.



Once I gave the screw driver a twist a wire hook helps to lift the snap ring free from the groove in the case.

Another thing I need to check is the speedometer speed sensor which is some sort of Hall sensor, Pat's truck uses 16 inch tires and the transmission core more than likely had 15 inch. I don's need goofy signals being sent tot he computer.