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Any auto 550 owners here running an SB?

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Old 05-27-2009, 09:24 AM
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If so, have you experienced any issues with weird, inconsistent or jerky transmission shifts, particularly in DS mode?

Has anyone ever heard of a "bad" SB?
Old 05-27-2009, 09:51 AM
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I ran my '06 550i Steptronic on a Sprint Booster for a couple years and never had any issues with it ... other than a sore neck.
Old 05-27-2009, 09:52 AM
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Originally Posted by tachyon' post='891857' date='May 27 2009, 10:51 AM
I ran my '06 550i Steptronic on a Sprint Booster for a couple years and never had any issues with it ... other than a sore neck.
Thanks...I'll see what kind of feedback I get here...perhaps I just recieved a bad SB?
Old 05-27-2009, 10:51 AM
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I have an auto 545 with an SB. No problems here. It took some getting use to but it's been great. It was one of the first things I did to the car.

Maybe the SB is making an already jerky transmition feel worse than it is??

Try the transmition reset trick too. That might help.


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Old 05-27-2009, 06:23 PM
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try reseting your tranny...i have a 550 with SB and no issues here...
Old 05-27-2009, 06:28 PM
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wassup man, mine was jerky in the beginning,
u just need to keep steady pressure on the gas,
dont half ass it especially while its shifting up real fast.
Do the reset trick too GL

Originally Posted by El Immigrante' post='891825' date='May 27 2009, 10:24 AM
If so, have you experienced any issues with weird, inconsistent or jerky transmission shifts, particularly in DS mode?

Has anyone ever heard of a "bad" SB?
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