05-13-2024, 07:37 AM | #1 |
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Clutches C and D not plausible
Hello everyone,
Recently I started getting jerking when the car was changing gears and a recent drive train malfunction error but after a start/stop the error went away but the car still jerks and sometimes cuts power. I brought the car for a diagnostic and the tester read :Code: 4204C1 - "Gear-ratio monitoring: Clutches C and D not plausible" Does anyone have experience what this could be what repair costs would be involved? Car: BMW x5 F15 40D Miles: 143.000KM |
05-13-2024, 07:52 AM | #2 |
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Welcome.
I expect your only option with that code and symptoms is to replace the transmission. Has the fluid and filter been changed? - not that it will resolve the problem, but good info for others. The below is German - your browser should be able to translate: https://www.f10-forum.de/forum/threa...alyse-was-tun/ |
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05-13-2024, 08:42 AM | #4 |
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I meant was the fluid and filter done at the recommended mileage interval - definitely not a cure for problems, but a preventative measure.
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05-13-2024, 02:00 PM | #5 |
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This is most likely related to the mecatronics which controls the transmission. Unless driving in limp mode which expose clutches to high wear replacing the mecatronics can be an alternative.
Check sonnax as they have solution for it. Regards |
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05-13-2024, 09:32 PM | #6 |
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is the jerking mainly when you are going into 3rd and 4th?
Given the price of a used unit, thorough troubleshooting doesn't make allot of financial sense. If you are ok with $$ of full disassembly and analysis, the labour hours + parts + assembly will roughly = a new unit. So just get a new transmission. The most you/your mechanic can check is the solenoids and vacuum test the mechatronic block. Granted this test alone will not be cheap as you do need to full oil service on top of the labour hours (approx. 4hrs) to remove, disassemble, clean, test, reassemble, fit, fill oil. This does not include the time + parts needed to fix (if possible) the block. |
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05-15-2024, 07:53 AM | #7 |
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I just went to a specialised mechanic he said it's the clutches that need replacement, so I need a new clutch pack
Whole repair coming in a 2600 euro Last edited by jelico1; 05-15-2024 at 07:54 AM.. Reason: Missed point |
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05-15-2024, 09:33 AM | #8 |
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That would go against the advice offered by others in this thread, but not an issue if you get a written guarantee that your transmission will function and perform like a new one after the quoted repair, and if not, what would be the next course of action.
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05-15-2024, 04:46 PM | #9 | |
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Quote:
Since you are already tearing into it, do get him to vacuum check the block and refresh all the wear items, ie. the sonnax zip kit. |
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05-16-2024, 06:15 AM | #11 |
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So he is replacing the C & D packs with new ones, new gaskets and re-conditioning the
torque converter said this is very common in this model of X5 The diagnostic came from the BMW garage they put a tester through |
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05-17-2024, 04:56 PM | #13 | |
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Quote:
Same could be said about the mechatronics valve block. If clutches C & D are gone, given the amount of clutch material that is floating around in the oil. It would be a really good idea to clean out the mechatronics valve block and inspect if any of the valve bores have worn out. or Maybe they are looking for repeat business. |
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