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Re: 96 EEC-IV (OBD I) E4OD Early Upshift
Posted to Transmission Forum on 6/22/2018

I had this same truck year ,make but diesel & 4x4 with the same issue. It was shifting early & super hard. I had bought this truck off of a co worker, & he had a transmission replaced & still shifted early & hard. ended up being barometric pressure sensor, whi... Login to read more.