550i Step transmission weird behaviour
#1
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My Ride: 2006 Silverstone/Black M5 with Comfort Access, Manual Side Sunshades, Electric Rear Sunshade, M Multi-Function Active Seat, Head-Up Display.
I recently purchased an 06 550i with Stepronic. I've been driving it in DS mode 100% of the time. I noticed a strange behaviour with my transmission that lead me to send the car back to the dealership and for them to replace the entire transmission. Unfortunately the new transmission is doing exactly the same thing. Here is the what happens:
Accelerate up to highway speed ... 80+ Km/h will do it ... once at highway speed decelerate smoothly back to a complete stop. My car will downshift from 5th to 4th to 3rd to 2nd (around 30 Km/h) and then it will *UPSHIFT* to 3rd for a second or so before downshifting back to 2nd. The upshift to 3rd is accompanied by a distinct transmission shifting noise and a sudden drop in RPMs to 1000. Very annoying behaviour. I returned the car to the dealer again and was given a 550i loaner with 500 KMs on it ... guess what ... it does the same thing.
Anyone else notice this behaviour? would love to hear from other 550/545 owners.
Many thanks in advance,
Osama
Accelerate up to highway speed ... 80+ Km/h will do it ... once at highway speed decelerate smoothly back to a complete stop. My car will downshift from 5th to 4th to 3rd to 2nd (around 30 Km/h) and then it will *UPSHIFT* to 3rd for a second or so before downshifting back to 2nd. The upshift to 3rd is accompanied by a distinct transmission shifting noise and a sudden drop in RPMs to 1000. Very annoying behaviour. I returned the car to the dealer again and was given a 550i loaner with 500 KMs on it ... guess what ... it does the same thing.
Anyone else notice this behaviour? would love to hear from other 550/545 owners.
Many thanks in advance,
Osama
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not much help, but i had a 545i loaner with auto tranny last summer and it did not exhibit any behaviour like this so it seems very strange...
but to have it on 2gearboxes and 2 different cars ?
but to have it on 2gearboxes and 2 different cars ?
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My Ride: 2006 550i, Sport, Alpine White, Biege Interior, Steptronic, NAV, HUD, Ventilated Seats, Active Cruise, Active Steering, Comfort Access, Logic7, Sirius
I might be having the same problem. The transmission in my car seems to shift up and down while slowing down from 45mph or so. It's more like it just isnt quite sure what gear it wants to be in. It ends up staying in a gear that I feel is a little low for the situation. If i lift off the gas pedal just barely the car slows due to engine braking and then if i barely push on the pedal it lunges. Very hard to drive smoothly!!! Also runs kind of rough for the first 10 minutes or so after starting.
I have an appointment for it on Wednesday for CIP 20 to be installed. Hope this fixes both issues!!
I have an appointment for it on Wednesday for CIP 20 to be installed. Hope this fixes both issues!!
#4
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My Ride: 2014 X5 xDrive 5.0 M Package Carbon Black Metallic/2008 M Roadster Imola Red
Originally Posted by Osama Arafat' post='221750' date='Jan 9 2006, 07:00 PM
I recently purchased an 06 550i with Stepronic. I've been driving it in DS mode 100% of the time. I noticed a strange behaviour with my transmission that lead me to send the car back to the dealership and for them to replace the entire transmission. Unfortunately the new transmission is doing exactly the same thing. Here is the what happens:
Accelerate up to highway speed ... 80+ Km/h will do it ... once at highway speed decelerate smoothly back to a complete stop. My car will downshift from 5th to 4th to 3rd to 2nd (around 30 Km/h) and then it will *UPSHIFT* to 3rd for a second or so before downshifting back to 2nd. The upshift to 3rd is accompanied by a distinct transmission shifting noise and a sudden drop in RPMs to 1000. Very annoying behaviour. I returned the car to the dealer again and was given a 550i loaner with 500 KMs on it ... guess what ... it does the same thing.
Anyone else notice this behaviour? would love to hear from other 550/545 owners.
Many thanks in advance,
Osama
Accelerate up to highway speed ... 80+ Km/h will do it ... once at highway speed decelerate smoothly back to a complete stop. My car will downshift from 5th to 4th to 3rd to 2nd (around 30 Km/h) and then it will *UPSHIFT* to 3rd for a second or so before downshifting back to 2nd. The upshift to 3rd is accompanied by a distinct transmission shifting noise and a sudden drop in RPMs to 1000. Very annoying behaviour. I returned the car to the dealer again and was given a 550i loaner with 500 KMs on it ... guess what ... it does the same thing.
Anyone else notice this behaviour? would love to hear from other 550/545 owners.
Many thanks in advance,
Osama
I am glad you still are around, but am sorry that you are having the same significant problem. Except for what is said above, I have not heard of anyone having the problem but you.
#5
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I have not noticed this pattern. I'm traveling for a few days and will try it out in my 550 when I get back.
If anything, I would say it is a software issue, not mechanical.
If anything, I would say it is a software issue, not mechanical.
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Osama
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My Ride: 2005 BMW 545i, Silver Grey, Sport Package, R. Shades, Cold Pkg, Sat. Rad., Prem. Sound.
Originally Posted by Osama Arafat' post='221750' date='Jan 9 2006, 06:00 PM
I recently purchased an 06 550i with Stepronic. I've been driving it in DS mode 100% of the time. I noticed a strange behaviour with my transmission that lead me to send the car back to the dealership and for them to replace the entire transmission. Unfortunately the new transmission is doing exactly the same thing. Here is the what happens:
Accelerate up to highway speed ... 80+ Km/h will do it ... once at highway speed decelerate smoothly back to a complete stop. My car will downshift from 5th to 4th to 3rd to 2nd (around 30 Km/h) and then it will *UPSHIFT* to 3rd for a second or so before downshifting back to 2nd. The upshift to 3rd is accompanied by a distinct transmission shifting noise and a sudden drop in RPMs to 1000. Very annoying behaviour. I returned the car to the dealer again and was given a 550i loaner with 500 KMs on it ... guess what ... it does the same thing.
Anyone else notice this behaviour? would love to hear from other 550/545 owners.
Many thanks in advance,
Osama
Accelerate up to highway speed ... 80+ Km/h will do it ... once at highway speed decelerate smoothly back to a complete stop. My car will downshift from 5th to 4th to 3rd to 2nd (around 30 Km/h) and then it will *UPSHIFT* to 3rd for a second or so before downshifting back to 2nd. The upshift to 3rd is accompanied by a distinct transmission shifting noise and a sudden drop in RPMs to 1000. Very annoying behaviour. I returned the car to the dealer again and was given a 550i loaner with 500 KMs on it ... guess what ... it does the same thing.
Anyone else notice this behaviour? would love to hear from other 550/545 owners.
Many thanks in advance,
Osama
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Originally Posted by Dirty 30' post='222005' date='Jan 10 2006, 12:32 PM
I'm surprised the dealer replaced the transmission over those symptoms. the odds of it being mechanical were by far outweighed by it being software related.
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My Ride: 2014 X5 xDrive 5.0 M Package Carbon Black Metallic/2008 M Roadster Imola Red
[/quote]
I would imagine that the dealer either tried a software fix first or, through previous experience, knew that software would not fix the problem,