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Re: Please Help - 4l80e transmission not shifting to 3rd or 4th
Hopefully some one will chime in with some answers, A problem I had was the vss sensor on the transmission. Might try unplugging this and see if it's different when you drive it.......On mine 4L60E..at 30 mph it was telling the engine it was going 150mph. Coughed and died.
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