4l80e. Transmission failure 1st trip for 2015
My suburban has 123k and just blew the transmission on the first trip of the year. Fresh fluid and cool trans temps. Went to backup trailor on level ground. All gas/no go. Got it to drivewa...
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Trans was rebuilt with stage 3 shift kit. New issue discovered, no codes, or warnings. The PCU was not communicating with the transmission. It was never locking up the torque convertor. WTH, had the truck in 4 shops last year for the trans!
