04-05-2015, 08:19 AM | #23 |
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Excellent description of the problem. I'm really surprised how many car owners here in the northeast assume all wheel drive is a complete cure for winter driving, and that if they have AWD they will be fine with summer tires. And that's before you consider that AWD does nothing to help you stop on snow or ice.
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04-05-2015, 08:27 AM | #24 |
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Yikes! Can you point me to where Michelin said this? I routinely drive my PSS equipped SLK55 in temperatures as low as the 20's so long as the roads are dry (It does not leave the garage when there is snow or ice on the roads). I'm well aware that the summer rubber on these tires becomes hard below 40 degrees and you start to lose traction (I've been caught off guard by this a couple of times), but I didn't realize there is a risk of damaging the tires below 45 degrees, thanks.
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04-05-2015, 08:55 AM | #25 | |
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04-05-2015, 10:01 AM | #26 | |||
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And to the other poster, you can have DCS completely off and still be in manual mode and get all the benefits this poster just mentioned. And, as the above poster correctly points if you have the DHP it works independently so you have all the benefits of stiffer suspension etc without having to leave DSC on... Hope this all helps
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04-05-2015, 10:46 AM | #27 | |
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2. Manual feels more precise and has a shorter throw compared to 128i I had before. I can shift all important 2-3 gears quicker most of the time. 3. 2nd gear synchro is under-engineered and all it takes is one "mistake" to destroy the gearbox (in my case it was a medium-speed 1-2 shift at 5-6k rpm). This means now I await my 2nd gearbox replacement because once this gearbox has a serious grind in 2nd it is just a matter of time and things will go from bad to worse. This also means you're only one mistake away (if you can call spirited shifting in M-car a mistake) from paying $7000-8000 dollars (my estimate) for gearbox replacement if outside warranty or if your warranty claim is rejected because BMW blames driver error. Does anybody knows if this gearbox is made in China BTW ? BMW uses Getrag and Getrag has chinese factory. Also does this gearbox has 3-cone synchronizers on 2nd gear ? I have trouble finding any technical info that pertains to it. Because of poor durability of this gearbox I recommend against it but maybe I was just unlucky and got 2 bad gearboxes in a row, who knows. It is also possible that in my case other factors like bad clutch adjustment might have contributed to those failures. Or wrong gearbox oil, who knows ? Part of me still wants to believe that BMW doesn't skimp on quality and I was just unlucky. |
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04-05-2015, 12:05 PM | #28 |
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1. How heavy is the clutch pedal of the six speed in relation to other manual tranny cars? I'm still in the break in period and only have driven the car ,228i M Sport,500 miles but it is a very light and easy to use clutch.I haven't driven a manual trans regularly for about 12 years and haven't come close to stalling the car.As a matter of fact, I stalled it intentional to make sure there wasn't an electronic nanny associated with hill assist to prevent it from happening!I'm thinking it might actually be to light and easy for future "spirited" driving. We'll see.
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04-05-2015, 02:53 PM | #29 | |
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04-05-2015, 02:54 PM | #30 | |
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04-05-2015, 02:57 PM | #31 |
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I see on the Tire Rack site they have a minus 1 size option for winter tires. As I have a nearly new set of 225 17 Bizzaks for my 330i I could just keep those and use them with the 235. I assume I would need different wheels, but does anyone know if the wheel that fits the old 330i fits the M235?
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04-05-2015, 03:13 PM | #32 | |
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On 2addicts I seem to be the only one with manual gearbox problems. What I am really afraid is if BMW will cover my 2nd gearbox replacement under warranty (I still drive with it waiting for symptoms to become worse so I can replicate them better). If they don't cover it I am officially finished with the brand and high-performance cars in general. Too much stress on the drivetrain and the resulting repairs are too likely to happen and too expensive. It is just not worth the aggravation. And yes, I will never go automatic so don't ask. |
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04-05-2015, 03:22 PM | #33 | |
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04-05-2015, 05:55 PM | #34 |
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Thank you Zooks. I need to replace those rims anyway, so no great loss. I just put my summer wheels and tires back on and wow, what a difference. The pot holes were tough this year.
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04-06-2015, 02:53 AM | #35 | |
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04-06-2015, 07:04 AM | #36 | |
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04-06-2015, 07:38 AM | #37 | |
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04-06-2015, 08:31 AM | #38 |
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One would think that many others would have this problem if there was something wrong with the gearbox design. I wonder if there is something different about the clutch, clutch pedal, etc in your car?
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04-06-2015, 09:31 AM | #39 |
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I want to thank you all very much. This thread has helped me make my decision. Unless I learn something widespread about the synchro ring problem, I'm going to go with the manual. I'll need winter tires in either case, so there is less operational savings than I might have hoped for. I understand the auto has a slight fuel cost advantage, but I'm a bit suspicious about that and the amount of savings is not very much. It sounds like if I want to autocross it, the people who have responded are uniformly sending me in the direction of the manual, so I have to conclude the auto isn't as good for the performance issues I will encounter. The fact that the clutch pedal is described as light and balanced was a big help as I didn't want a car with a heavy clutch pedal.
I am amazed at two things about the automatic with xDrive. One is that the system adds very little weight to the vehicle (if I am understanding what I have read correctly). The second is that it really isn't very much faster than the manual. I would have thought the automatic when coupled with xDrive would accelerate much faster than the manual. Like on the order of .5+ seconds faster to 60 and maybe more on the quarter mile. But from what I read it is only a tenth or two. I'm sure auto with xDrive makes it much easier to achieve those times and much more consistently as well, but in other cars the all wheel drive and auto combo usually results in much faster times than those produced by manuals with open differential RWD. Maybe I am misunderstanding the reports I have read. If so, please correct me. Anyway, thank you all again. Bill |
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04-06-2015, 10:11 AM | #40 | |
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In regards to the acceleration difference for xDrive models, the reason the acceleration isn't so much better than the RWD is probably due to 2 things: 1) that BMW's xDrive system still adds quite a bit of weight (150-200 lbs) 2) that only the M cars put down so much power that the rear tires can't put the power down effectively. Not trying to say the M235i can't spin the wheels easily, but that the M235i wouldn't benefit from xDrive the same way that an M5 would.
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