My 2002 bmw 3301 has this code comingh up PO721 transmission, when i put it in drive a hear a winding noise and it is like in neutral, until i rev the engine for 7 seconds and it kicks in drive.
SOURCE: transmission slipping
What you need is a "revolution sensor" I had the same exact problem. Replaced the sensor and everything is fine
SOURCE: 04 Endeavor rattling noise
I had the same problem! I crawled underneath the car and discovered that a heat shield on the exhaust header pipe was corroded and rattling against the exhaust pipe. (Before the muffler)
I removed the portion and clamps and solved the problem. Give it a try.
SOURCE: where is the transmission dip stick located for the 2002 525i bmw
it is a sealed trans. you will have to bring it to BMW to have them take a look.... they dont put a dip stick on that car and many other's so you can't do anything except bring it to them to have it worked on... sorry for the bad news.... hope this helps you
SOURCE: Transmission slipping in drive and transmission whining.
SOUND LIKE TRANSMISSION IS SLIPPING.CHECK THE TRANSMISSION FLUID MAKE SURE ITS NOT LOW.ALSO IF TRANSMISSION FLUID LOOKS DIRTY DARK AND SMELLS BAD REPLACE FLUID AND FILTER.IF FLUID IS GOOD YOU HAVE.TRANSMISSION OIL PUMP AND FORWARD CLUTCH PROBLEMS.
SOURCE: 2003 honda pilot won't shift into drive
On my Honda Pilot I experienced the same problem having difficulty changing the gear shifter from park to drive. I drove it to my Honda dealer and the technician explained that the problem was a brake sensor was worn and needed to be replaced. This is because the brakes must be engaged before shifting from park into drive and that the sensor gets worn over time. As I remember, the sensor and labor to install was somewhere between $25 to $50 to replace. It now works like a charm.
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