1996 Jimmy is going out of gear after 50 mph if I select 2nd gear it works fine

Taek this to a trans pro, it'probably time for a rebuild especially with the mileage you have on it. He can give you a better/proper diagnosis.

The only vacuum lines going to the rear are for the evap cannister by the gas tank. The line you are talking about by the trans may be a vent line for the tcase that goes towards the top of trans. Because you are getting a shift soleonoid code and you have already changed a few then it is maybe a problem with teh clutch seal or clutch itself. That is why we reccomend going to a trans guy, they can give a better diagnosis because they can actually do a few things and see it whereas we cannot. The crank fuse sends power to the nuetral safety switch, which if your truck starts it shoudl be ok.

I'll see that you are given your dontaion back
sorry you don't like the answer.

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