I have a 96 silverado 4x4 vortex 350. The problem is I had the transmission rebuilt. It shifts fine then all of a sudden it stops down shifting and stays in 3rd. It throws a selonoid code ive changed.
Did you get a warranty on the trans? But sounds like you are fixing it yourself? Hard to know what you all did from your post.
I did get a war. With the trans. And hes been working on it. But hes saying its the computor or the ignition.
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