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Re: 1998 suburban K1500 does not up shift
Posted to Transmission Forum on 2/26/2002

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Normally, with 120,000 on a 4L60E, it has seen its usefulness. Disconnecting the solenoids should put this trans in 3rd gear in OD or D and second in 2 or 1. Being in 1st with the solenoids disconnect... Login to read more.