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I have a 94 Sidekick with an Automatic Transmission. The one it came with went bad and I got one from a junkyard that was guarenteed to fit. It fit alright but it must be from a newer zuke because it has electronic shift modulation instead of vacuum like the old one. It shifts manually okay but you can't put it in drive and go. Any suggestions on what I need to do to get the tranny working like "normal"?