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Originally Posted by JT///MC
OH, I didn't read this part.
UMMM, some bad news. You're tranny is DONE. Its smoked. I had the same codes come up "excessive slip" and it eventually went kaput. I drove it in trans fail safe mode for a while trying to figure what to do. It eventually burned out the remaining clutches and I had to find another HP22 tranny. Which btw is a SORRY GM tranny. I hope to never have to do that again. You should start to call junkyards for this tranny from a wrecked car. I got mine $900 delivered. Make sure you change out the filter and oil too with ESSO or whatever they recommend now. Its probably the only course you have besides getting a brand new tranny or a rebuilt. Which BTW were running 2.5k-3k 3 yrs ago when I had this done on my 740i.
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Thanks for your experience. Not sure if your 740i shared a similar trany as the 4.6is or your mileage at the time. I'm weighing several options at this point but having it monitored by the indy for the correct diagnosis and it seems we may replace the torque converter.