Here are some pictures for today. The first 3 are of what I think is your trans. Picture #1 shows the lock out lever at the "in"OD" position. The cable would be pushed in at the dash. With the cable pulled out the lever will move to the forward position and the OD will be locked out.The # on the side cover is 3741357. In the 2nd picture the J 8 67 would indicate that this one was cast October 8,1967. The OD is from Warner Gear division and it is an R10 so it has a 3 planetary gears in the OD set.
The next three are of the T86 solenoid that we repaired in Flagstaff on a trip to Texas. It has 3 terminals. The one on the GM trans has 2. The first picture shows the wire that was re-soldered. The original was soft soldered so that it would melt before damage was done to the windings.
Millions of these were thrown away because people didn't know they could be fixed. The present joint probably would not protect it but the fuse does and I have learned not to exceed ti 15AMP fuse, well not by much anyway. If I was reparing another on I would try using a 20AMP fusible link.
The 2nd picture shows a black wire soldered to the terminal that the orange wire is connected in the 3rd picture. It grounds to the outer case. This is only a ground and the thing will work without it. I think it is like the green safety ground on power tools.
I hope this helps.
