|
|
|
|
|
|
BMW Garage | BMW Meets | Register | Today's Posts | Search |
|
BMW 3-Series (E90 E92) Forum
>
auto transmission hard down shift
|
|
09-20-2013, 02:39 AM | #68 | |
Private First Class
36
Rep 165
Posts |
Quote:
#1 DIY Task for Transmission service (dissassembly) #2 PDF for Mechatronics replacement (dissassembly) #3 Once you have the Mechatronics on your bench, separate the big black plastic (TCM) from the valve body (there are several bolts). #4 Remove the metal black retaining plate from the solenoids (very thin plate at base of solenoids and mechatronics). #5 Twist and pull every solenoid straight out (replace one at a time so that you don't get the colors out of order). #6 Reassemble in reverse order and torque according to the specs in the PDF. Complete Mechatronics replacement task (PDF) and sealing sleeve adapter task. #7 Complete transmission service task. If anyone needs any help, feel free to ask, I'm normally pretty quick to respond. ( I really wish I had taken good photos for a DIY ) ( DOH! ) |
|
Appreciate
0
|
09-20-2013, 12:29 PM | #69 |
Major
84
Rep 1,099
Posts |
god damn it! I have this issue too..i didn't it was a issue and thought it was normal till i saw this thread...one more thing to add to my list i guess
I have the alpina flash..will this still solve my issue since i have the alpina flash?? |
Appreciate
0
|
09-20-2013, 03:19 PM | #70 | |
Private First Class
36
Rep 165
Posts |
Quote:
Are you able to temporarily disable the flash to see if the hard shift is still there? I also see you drive an '09...is it still under warranty? If so, INSIST the dealer replace the solenoids in the Mechatronics. It will be an uphill battle, but worth the fight. |
|
Appreciate
0
|
09-20-2013, 04:11 PM | #71 | |
Major
84
Rep 1,099
Posts |
Quote:
Damn I don't remember when it started.. I just accepted it as normal so i didn't pay too much attention to it. but i think it has been more noticeable recently since the flash. I guess I need to pay more attention and find out when/how often my car does that. I'm all out of warranty and I would have to learn how to code/set up the programs in order to flash back to stock cause I ain't paying for it again |
|
Appreciate
0
|
09-20-2013, 04:28 PM | #72 |
Brigadier General
1009
Rep 3,898
Posts
Drives: 330i, 135i
Join Date: Feb 2006
Location: San Diego CA
|
Yeah me too. I ve experience this " jolt bump" only at times and always thought I was not pressing the brake pedal strong enough...
I guess I know the fix for this issue which is the replacement of the solenoids... oh boy... |
Appreciate
0
|
09-22-2013, 05:57 AM | #73 |
Private First Class
36
Rep 165
Posts |
Take a trip out to Phoenix, your close enough! I'll get it done for you in a few hours.
|
Appreciate
0
|
09-23-2013, 02:05 AM | #74 |
Brigadier General
1009
Rep 3,898
Posts
Drives: 330i, 135i
Join Date: Feb 2006
Location: San Diego CA
|
Thanks buddy. I ll ask a friend whos a BMW tech see what he has to say about it. Cheers ;-)
Last edited by GoRomeo; 09-23-2013 at 11:11 AM.. |
Appreciate
0
|
09-28-2013, 08:27 PM | #75 |
Enlisted Member
1
Rep 40
Posts |
i just bought a used 2006 e90 335 from BMW (the mileage is only ~28000km)
and yes like many of you I notice the problem in testdrive but just thought it's my braking technique initially it is quite obvious in D mode and happen quite often. it does not happen if I drive slowly in carpark or traffic jam. so I bring it back to BMW last week and they do something about the computer now not much jolt in D mode, but in DS mode it still happen sometimes, usually more obvious when I drive at moderate speed (e.g. ~80kmh) then apply slightly hard brake to a stop any suggestion? ask BMW to change solenoid? and btw, when I check my car with INPA, it never have any error codes. Does that mean anything? Last edited by betaruce; 09-28-2013 at 10:02 PM.. |
Appreciate
0
|
09-29-2013, 06:46 AM | #76 | |
Private First Class
36
Rep 165
Posts |
Quote:
|
|
Appreciate
0
|
09-30-2013, 03:33 AM | #77 |
Lieutenant Colonel
45
Rep 1,754
Posts |
Question -- does anyone know if leaving this problem unfixed can / will damage the transmission?
Our 2008 sedan with about 65000 miles just started doing this once in a while. So far, it just feels like an abrupt shift and is tolerable. I don't think SWMBO has even noticed it yet, or else she hasn't said anything. I was planning to do a fluid change around 80K miles -- any thoughts on just letting it go until then? Is it likely to get so bad we can't ignore it anymore? |
Appreciate
0
|
09-30-2013, 05:25 AM | #78 | |
Private First Class
36
Rep 165
Posts |
Quote:
|
|
Appreciate
0
|
09-30-2013, 08:33 AM | #79 | |
Enlisted Member
1
Rep 40
Posts |
Quote:
back to the basic, actually what exactly is happening inside the gearbox causing the jolt? what happen to the solenoid? why some people can fix it with simply computer reset? why it does not damage the transmission? thanks. would like to know more about it --- on a side note, i hate this sort of "relatively minor problem" it doesn't happen all the time, and the BMW mechanics sometimes don't know what we are talking about is there an official BMW document about this problem? so I may show the BMW mechanics Last edited by betaruce; 09-30-2013 at 08:59 AM.. |
|
Appreciate
0
|
09-30-2013, 12:59 PM | #80 |
Major
84
Rep 1,099
Posts |
After doing some observations and keeping on eye out, it looks like this only happens to me in S mode with the alpina flash. barely feel it in D and never really in M mode. I'll stay put now since i dont use S mode that often i guess and maybe replace in the future if it isn't bad for your transmission to not fix it asap
|
Appreciate
0
|
09-30-2013, 01:10 PM | #81 | |
Brigadier General
1009
Rep 3,898
Posts
Drives: 330i, 135i
Join Date: Feb 2006
Location: San Diego CA
|
Quote:
Mine can barely feel it and only at times if any. What about changing the tranny fluid only? I am at 110k miles. I want to change tranny fluid as preventive maint. My BMW tech friend is willing to change fluid he said... |
|
Appreciate
0
|
09-30-2013, 09:18 PM | #82 | |
Private First Class
36
Rep 165
Posts |
Quote:
Sometimes an adaption reset will work if it is simply an issue with an aggressive shift pattern rather than a faulty solenoid. Even with a faulty solenoid, the reset may work for a little while because it is set back to factory defaults, which is different from what it had adapted to. Once the transmission relearns your style, the problem will come back if the solenoid is faulty. As far as damaging the transmission, again, I am not positive whether or not it will cause damage. I am leaning more on the side of it will not, as the transmission is still shifting, just at the wrong time. There is no documentation relevant to this issue that I have found because BMW has, to date, been unable to fix this problem! The only documentation you will find will instruct the dealer to update the software and reset the adaptations. The other solutions I have found with research are: transmission replaced, or mechatronics replaced, both of which costs thousands of dollars. The problem is, the mechanics at the dealers only know how to hook a computer up to your car, so if there is no error code, they say there is no problem. They aren't real mechanics and don't understand the intricate workings of the vehicle. In order to solve a problem, you must understand how the machine is supposed to work and how it is actually working. I guess it takes an engineer's mindset to figure this stuff out! The logical steps to take in order are: 1. Reset adaptations 2. Update software 3. Complete transmission service 4. Replace transmission seal adapter and mechatronics seal with solenoid replacement I caution you though...this is an expensive process if you follow that order. If you are going to do the work yourself, I would suggest starting with number 4 and complete number 1 and 3 at the same time. If you are having a shop do the work and you are doing it in this order, you will be charged twice for the transmission service because everything must be drained out to replace the solenoids. I would be more than happy to help you out if you were in the Phoenix area. I wish you luck. |
|
Appreciate
0
|
09-30-2013, 09:22 PM | #83 |
Private First Class
36
Rep 165
Posts |
ZF (manufacturer) recommends a transmission service every 100k, it is a good idea. BMW says it's "lifetime" because they do not want to pay for the service under warranty. I do what the manufacturer says, not what BMW says.
|
Appreciate
0
|
09-30-2013, 09:25 PM | #84 | |
Private First Class
36
Rep 165
Posts |
Quote:
|
|
Appreciate
0
|
10-01-2013, 01:57 AM | #85 |
Brigadier General
1009
Rep 3,898
Posts
Drives: 330i, 135i
Join Date: Feb 2006
Location: San Diego CA
|
|
Appreciate
0
|
10-01-2013, 04:36 AM | #87 |
Private First Class
36
Rep 165
Posts |
Your best bet is to contact your local dealer to find out if you vehicle is still under warranty and whether or not they will replace solenoids under warranty. If you are hearing noises from your torque converter, the solenoids may not be your issue anyway.
|
Appreciate
0
|
10-01-2013, 07:40 AM | #88 | |
Enlisted Member
1
Rep 40
Posts |
Quote:
thanks zigsman!! very useful and detailed explanation!!! I will be meeting the BMW mechanics tomorrow as they think the DS mode has no issue while I think there is still residual jolt (last time it is very obvious in D mode and it does improve after they computer reset). since I buy it as a used car and BMW only offer 1 month warranty, which will be expiring within 1-2 weeks, I just hope they can fix it completely....... and btw, can you please enlighten us about how do you do the computer reset part? can it be done with INPA? Last edited by betaruce; 10-01-2013 at 09:22 AM.. |
|
Appreciate
0
|
Bookmarks |
|
|