I would make who ever is tuning your truck give it another shot.. Tuning is the key to a happy 5r transmission. Give the guys at Innovative a call and have them take a shot at tuning your transmission.
The transmission can only handle what the tuning calls for. The 5r110 is almost too smart for its own good with the adaptive learn it has on it. Thats why taking it back to stock and seeing what it does will help diag. any problems by pin pointing if the custom tuning in the trans is destroying it or if it is actually a transmission problem.
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