harsh downshifts when braking
04-25-2013, 08:13 PM
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harsh downshifts when braking
So i recently flushed out my tranny and replaced the pan, filled with bmw tranny fluid till it was full, about 5 qts. The next day i drove it, it started to have harsh downshifts when i would come to a stop. Small "bumps" when i slow down, and another harsh "bump" when i stop. I have searched alot of places for answers but none that have fixed it. I have tried the tranny reset method, resetting the computer by unplugging battery and still no luck. Anybody have any ideas what is causing it?
04-26-2013, 10:33 AM
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My Ride: 2010 550i M Sport
"filled with bmw tranny" should be done in 2 steps
second step is on running engine
have y follow BMW TIS ?
second step is on running engine
have y follow BMW TIS ?
Last edited by champaign777; 04-27-2013 at 06:34 AM.
04-26-2013, 04:01 PM
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My Ride: 2007 E60 550i Black/Sand. Dinan free flow intake, throttle body, carbon fiber strut brace, and exhaust. Carbon fiber engine cover. Blend mount for a Belltronics RD w/mirror tap. Smoke LED taillights. Projector fog-lites w/HID kit.
Mechatronic (i think is what its called) sleeve comes to mind. Had the same issues w/my 07' 550i and that was what fixed mine.
04-27-2013, 06:53 PM
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My Ride: 2007 550i (Sport, Prem, Nav, Logic7, Comf. Seats) Black on Black
How long ago did you service your tranny?
I had a couple hard up shifts... so I replaced the fluid and filter at an indy.... Upshifts were now smooth, however I had a hard downshift around 10-15 mph. Every time coming to a stop!! Lasted about a week.... I had to have the car sit for a couple weeks and now it shifts smooth up and down. Better than ever. Crazy.
I had a couple hard up shifts... so I replaced the fluid and filter at an indy.... Upshifts were now smooth, however I had a hard downshift around 10-15 mph. Every time coming to a stop!! Lasted about a week.... I had to have the car sit for a couple weeks and now it shifts smooth up and down. Better than ever. Crazy.
04-29-2013, 10:22 AM
#7
I always thought the tell tale sign was when the Mechatronic sleeve was leaking you would get that downshift - well that's what I was told anyway.
04-30-2013, 06:39 PM
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My Ride: 2007 E60 550i Black/Sand. Dinan free flow intake, throttle body, carbon fiber strut brace, and exhaust. Carbon fiber engine cover. Blend mount for a Belltronics RD w/mirror tap. Smoke LED taillights. Projector fog-lites w/HID kit.
I was told the leak was a result of the sleeve needing repair, i made an appt to fix the leak before the hard shifts took place, between the time i made the appt and saw my indi the hard shifts started and progressively got worse. Took abt 45 days to go from noticeable to troublesome.
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