05-09-2016, 06:11 PM | #67 | |
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05-09-2016, 07:35 PM | #68 | |
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I use redline MTL oil, the stock oil is very thin. It seemed to help,but needs to warm up as well, and your still not taking any fast downshifts to 2nd. I really do not have many instances where I need to downshift to 2nd fast or from 1st to 2nd fast. The cdv valve is annoying. I think that is what most people are feeling, as there is a delay in release from when you come off the pedal. It seems as if the main goal is to penalize people who know how to drive a manual. |
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05-09-2016, 08:15 PM | #69 | |
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05-11-2016, 09:11 PM | #70 |
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Same here, after reading this thread it dawned on me but i have always wondered why the engagement felt odd in this car and now it all makes sense. I have gotten used to it but almost seems like im predicting engagment at times and not driving the car subconsciously. I feel like im always thinking about the shiftpoints and disengaging and engaging of the clutch something ive never done with any other manual.
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05-11-2016, 09:13 PM | #71 | |
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05-14-2016, 12:36 AM | #72 |
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Also, the fact that the engine/trans mounts are soft is only making the issue worse, adding to the "delayed" or "imprecise" feeling. Theoretically upgrading the mounts should help but I haven't found any aftermarket solutions. I am curious to know whether the M2 has stiffer mounts....it probably does and they would most likely be a nice upgrade for our cars.
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05-16-2016, 04:47 PM | #73 |
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I've owned my M235 6MT since early February. Shortly after getting the car, I made my own "clutch pedal stop" with a piece of 1/4" high durometer foam and 3M tape. I've been driving manuals since 1993 and found the clutch engagement on the M235 to be off at times, specifically starting in 1st and the 1-2 shift. It's like the engagement point moves around a bit. Basically I could occasionally be a abrupt when leaving in 1st or on the 1-2 shift. I found this annoying and a bit ego shattering considering how long I owned and competitively raced manual transmission cars.
After learning a bit more about how these CDVs work and most importantly, BMW's clutch system design that maintains the engagement in the same overall area as the clutch wears, last week I decided to remove my clutch stop and see if there was a change. To my amazement, it's far easier to modulate the clutch and I'm smooth all the time. Yes, the OEM clutch travel is a bit excessive, but it makes for much easier and consistent modulation. Given this, I do have doubts about the overall effectiveness of the clutch stop and it's operation in relationship to BMW's clutch system design. I can also see how even just a 3/8" thick clutch stop could potentially negatively effect the life of the clutch assembly. |
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05-16-2016, 04:49 PM | #74 | |
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05-16-2016, 08:53 PM | #75 | ||
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06-21-2016, 03:28 PM | #76 |
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Drives: M235i alpine white on black
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My car goes in Monday. Driven by tech today, experienced grind with every shift above 5000 rpm from first to second. 21000 miles on car
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06-23-2016, 04:16 PM | #77 |
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My car went in today for the exact same thing. I found that you can avoid the grind if, when you throw the clutch in, you wait about .2 of a second before shifting. It's not an excuse for the grinding, but it worked while I was waiting for an appointment.
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06-23-2016, 04:36 PM | #79 |
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It didn't exist when I got the car, so I have reason to believe something broke (I'm at 25k miles about, and I think I started noticing this about 6 months ago) rather than its just a design flaw.
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06-23-2016, 05:53 PM | #80 |
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It will be "fun" to have clutch and transmission repaired after warranty period expires. In Canada the clutch itself (with the flywheel because it usually needs replacement too) costs $4800 CDN to replace . And the transmission soon follows because the clutch irreparably damages its synchro which manifests itself as grinding sound and sensation. I speculate a dealer or good specialist (they aren't any cheaper, I checked) will charge around $10000 CDN to replace the transmision. So there you have it: for a mere $15000 CDN you can continue "enjoying" your ultimate BMW experience. Because BMW charges Ferrari prices for parts and labour why not buy a used 360 Modena at this point ? Or take an axe to BMW piece of shit (as regards durability) and buy a Corolla for this $15000. At least in this way you won't continue throwing money down the drain with no end in sight.
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06-24-2016, 01:58 AM | #81 |
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I haven't looked at this - but does the M235i use a dual-mass flywheel? If so, did at any point BMW test run-out and play in the flywheel?
In my previous Renault Sport Megane (you guys don't get in US) - I had similiar issues I would say to what you describe but perhaps a bit worse. I would get issues with shifting into 1st and 2nd, especially on warmer days. In that case - it turned out the dual-mass flywheel had failed which was causing the clutch to not disengage fully, so when you were in 1st with the clutch pedal fully in, you were still rolling forward a couple of km/h. The failed DMF caused both the flywheel and pressure plates to have burn marks on them from slippage. FWIW that gearbox was manufactured by Getrag, which I believe BMW also uses for its manual gearboxes? |
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06-24-2016, 03:49 AM | #82 | |
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06-24-2016, 08:07 AM | #83 |
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Thanks for your feedback. And yes, M235i uses dualmass flywheel. And no, in my case they didn't test run-out and play in the flywheel. Why would they ? Getting to the bottom of it was never their priority, gouging the customer was. I did keep the flywheel though. Maybe I can still bring it to independent specialist to have run-out and play measured ? (assuming they even perform those tests).
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06-24-2016, 10:14 AM | #84 |
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06-24-2016, 10:15 AM | #85 | |
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I drive a lot in heavily populated part of the city and now I am scared to do a quick 1-2 shift when people are nearby. I have been embarrassed few times already from grinding my gears loudly when people are watching and followed by pointing and laughing at my "amateur" driving skills. Last edited by Merc for hire; 06-24-2016 at 10:21 AM.. |
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06-24-2016, 06:07 PM | #86 | |
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Mine does not grind with the mtl, a slight vibration on a fast 1/2 shift, Almost like I dumped the clutch to fast. I think it is more the cdv or the syncro design. Perhaps the thicker fluid keeps the gears better lubricated. I have zero evidence for any of this. |
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06-24-2016, 06:21 PM | #87 | |
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Just as a reminder -- my grinding was so bad that, even under no load, above 4500 rpm it would grind into second every time (even with a fairly slow shift). My guess is that gearboxes aren't supposed to have loose metal floating around, so this sounds like it just broke, rather than it being a design defect (hopefully). I'll update again when they let me know what they are going to do.
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06-24-2016, 09:14 PM | #88 | |
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Because of that I would strongly push them examine the clutch because if it has a disengagement problem it will keep eating synchros and therefore gearboxes. That's what was happening in my case anyway: I hope you have better luck. |
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