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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Ok the transmission is out of the truck right now and apart. The bad news was it had been rebuilt by previous owners and last rebuild forgot or f'd up an O-ring. Burned clutches for 3rd and Reverse. Seriously mangled pump piston area where the o-ring screw up occurred. It had a maroon torque converter, cracked upper engine block bolt tab, and needed to be machined off the bell housing. Last season's bandaids : hot trans warnings, and wasting $700 in diagnostic attempts, flushes, and re-flushes. Going with a new GM torque converter, stage 3 shift kit, additional clutches, and additional new parts if needed.
