Quote:
Originally Posted by TwinTurboGTR
Good morning. The last time anyone posted on this thread was Dec. of last year. While your information is concise and well written, the topic has been beaten to death. There is a consensus from other members and former techs on this forum that support you don't touch the tranny if it has hit 100k and has never been cracked open before. Using the old adage of "if it ain't broke..." The exception would be if the tranny is experiencing problems, then change fluid. You may be looking at an overhaul of the tranny anyway, so as a last ditch effort to squeeze the last bit of life out, you could drop the pan and change the oil and filter, but end result normally is the same.
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Consensus doesn't prove anything. I'm in the camp of changing the transmission fluid. I had it changed in my 2001 4.4i with 108K miles (right after I purchased the vehicle) and drove it to 129K miles before buying my current X5. Never had a hint of problem with it.
I had it serviced at an indy who specializes in German vehicles and the owner hsa over 25 years working as a mechanic and service manager for BMW / Mercedes before opening his own shop. It has been his
experience changing the transmission fluid does not result in increased failure rates. To date I have seen no supporting facts showing an increase in faliure rates for transmissions where the fluid was changed after high mileage. Until such time I'm chalking this up to a wives tale.