08-28-2020, 08:31 PM | #1 |
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DCT replaced after 20,000 KMs !!!
2016 M4 DCT with only 20,000 KMs
Needed new transmission. Service Notes below. Anyone else have this? ROAD TESTED AND VERIFIED GRINDING NOISE BETWEEN SHIFTS(DCT GEARBOX). GRINDING NOISE IS PRESENT AT ALL SHIFT SPEEDS(1-3) IN MANUAL AND AUTO MODES. RAN BRIEF TEST, NO RELATED FAULTS STORED. FOLLOWED THROUGH TEST PLAN FOR SHIFT FORKS, NO ISSUES FOUND WHEN PERFORMING CHECK. ATTEMPTED TO RUN THROUGH TRANSMISSION SENSOR CHECKS AND CLUTCH CHECKS HOWEVER ALL TEST PLANS END AS NO FAULTS ARE STORED. GRINDING NOISE IS INTERNAL TO TRANSMISSION AND ONLY OCCURS BETWEEN SHIFTS. NOISE IS CHARACTERISTIC TO GRINDING OF GEARS WHERE IT IS POSSIBLE ONE OR MORE SYNCHRONIZERS ARE DAMAGED OR SHIFTING FORKS ARE DAMAGED. FAULT IS INTERNAL TO TRANSMISSION, DCT GEARBOX REQUIRES REPLACEMENT. REPLACED THE TWIN CLUTCH GEARBOX ASSEMBLY. |
08-28-2020, 08:32 PM | #2 | |
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Did you have a transmission shudder accelerating in gear? |
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08-30-2020, 03:00 AM | #5 |
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Try request a goodwill repair if it's no longer under warranty?
That sucks, BMW DCT failures are very rare I believe. But if it happens.... The costs are not pleasant. |
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01-19-2021, 11:34 PM | #7 |
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DCT started acting up on my M4 3 weeks ago. Started slipping back into park from both D and R when in driveway. Took it into service and was told something shorted out in in shifter assembly and replaced for $1,800. Picked up and same thing, then other issues began. Wouldn't go into 1st gear at a full stop, wouldn't shift at normal shift points. Took it back from service and on the way got a drivetrain malfunction message. Service had it for a week, passed to "foreman' and called today and are asking BMW for an "assessment." Was told best case replace the mechatronic adapter, $5,000 or replace the transmission $10K plus for the transmission, no labor. ONLY 50K miles. No warranty. Thinking about buying a used DCT for $3K. Any advice?
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01-23-2021, 07:09 PM | #8 | |
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01-24-2021, 07:47 PM | #9 | |
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Faults with these DCTs are very rare, so risk is very low with a used unit. |
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01-24-2021, 08:14 PM | #10 |
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Drives: G87 M2; E92M3 MT&DCT; M3 euro
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If you drive like a granny you will wear out the clutches quickly.
DCT is a sequential manual gearbox, not your typical slush auto.
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01-25-2021, 07:23 PM | #11 |
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Sounds like a similar fault I had and BMW did a full DCT replacement under warranty.
The fault was a faint and repeatable "clunk" when going from 2 to 3 or when in 3 and changing to neutral when moving under light loads. This was pronounced, repeatable and not the same clunk noise you get when going into R at a stand still or when going through the gears. Premature Synchro wear was the diagnosis and they don't break open the DCT boxes to fix them - they send them back to Germany and swapped for a new one. Mine was around 15,000 KMs. |
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