Automatic Transmission making scraping noise on 5th gear

BMW 740
70,000 MILES • V8 • 2WD • AUTOMATIC
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ONEREPUBLIC
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My Automatic transmission is making a scraping noise when it shifts from the 4th to 5th gear and also the RPM starts going up/down you can also tell that theres no more power and if you hit the pedal by a bit the transmission goes back to 4th gear and everything is fine thats only if i drive in DRIVE mode , if i put the stick back to 4 which is sport mode it doesnt do that at all.
Jan 25, 2010 at 11:45 PM
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DR LOOT
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it sounds like to torque converter is coming apart, do to the fact that when you "put the stick back to 4 which is sport mode it doesnt do that at all" which is disengaging the lockup torque converter. or you may have a bad solenoid, you will need to take it to a transmission shop to have it diagnosed the transmissions are very complicated and I don't think you have the special tools.


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Feb 11, 2010 at 8:24 PM