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Re: 4L60E GM
Posted to Transmission Forum on 5/25/2019 1 Reply

Did you get any more codes yet? Sounds like the 1/2 solenoid may be electrically okay but is not closing off the hydraulic check valve. You need that solenoid and valve operating for 1st and 4th. The spring of the 1/2 shift valve could be broken to cause this ... Login to read more.

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