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6 Series DIY
6 Series Do It Yourself (DIY) forum.

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  #1  
Old 08-11-2012, 02:57 PM
Sammyy90 Sammyy90 is offline
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Transmission

Does anyone know if the transmission oil needs to be serviced after 100,000 miles. The dealer says its fluid is lifetime but something doesn't sound right, has anyone serviced theres and experienced problems?
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  #2  
Old 08-12-2012, 09:26 AM
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Yorgi Yorgi is offline
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Quote:
Originally Posted by Sammyy90 View Post
Does anyone know if the transmission oil needs to be serviced after 100,000 miles. The dealer says its fluid is lifetime but something doesn't sound right, has anyone serviced theres and experienced problems?
Read this thread.I am in agreement with the first post in that thread.

Basically you should change the oil and filter every 60K miles (or less) to maintain optimal oil viscosity and cleanliness. If you wait too long the transmission clutch packs will start wearing and the resulting grit in the oil will help the worn transmission grip. So changing oil on a worn transmission can result in more problems.

Hard to prove any of this but it makes sense to me.

BMW policy is to never change the oil - ever. BMW will capture oil during transmission work and re-use it, and top up with new fluid.
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  #3  
Old 08-13-2012, 10:16 AM
Sammyy90 Sammyy90 is offline
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Do you recommend getting it changed ? Or is it risky? I'm at 134k miles
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  #4  
Old 08-13-2012, 05:38 PM
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Yorgi Yorgi is offline
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That is a tough choice. From what I've read you probably should not change all of the oil at that mileage. Maybe change half?

I would talk to some transmission shops before I decide. Those guys will know better than us internet mechanics.
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  #5  
Old 08-16-2012, 01:48 PM
645hamannkit 645hamannkit is offline
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I have a 645 with 70k. Should i change it?
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  #6  
Old 08-16-2012, 01:51 PM
Sammyy90 Sammyy90 is offline
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Lol I'm at 134k and haven't changed it yet. I think your good. I talked to the dealer today they said its life time and they just top it off. Plus they sell the oil in bulk. Something just doesn't sit well with me about it being "lifetime"
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  #7  
Old 08-16-2012, 07:17 PM
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Yorgi Yorgi is offline
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BMW calls it lifetime because once your transmission fails the oil has lasted the "life" of the transmission.

No oil change = faster wearing transmission = more profits. I would really like to hear what an experienced transmission tech has to say about BMWs lifetime policy.
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  #8  
Old 08-17-2012, 01:53 PM
Sammyy90 Sammyy90 is offline
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I just picked the car up and it is driving brand new ! They changed 5 liters and left 5 of the old oil and I can not stress how impressive the car is driving. When I would brake the car would stick and now it's perfect !
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  #9  
Old 06-11-2013, 01:20 PM
CCALSPD CCALSPD is offline
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Has anyone dumped a tranny yet? Mine is having shifting slips from 2-3-4th gears in auto. Also, when going from park to reverse it clunks pretty hard. I've got an ext warranty and need to know if I can get it replaced!
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  #10  
Old 06-11-2013, 01:23 PM
Sammyy90 Sammyy90 is offline
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Transmission

Mine does the same thing from park to reverse... Also when I'm doing about 60 and gas it the car goes on a transmission idol mode and accelerates but nothing passd first gear, but when I turn the car off then on again it like re programs and goes back to normal.. AlSo when I stop at stop lights the car does a little hop before fully stoping.. These cars are some pain in the ass. I don't wanna know the damage so haven't taken mine to a shop yet .. Just been driving it very carefully and it's been fine.


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  #11  
Old 06-12-2013, 01:39 PM
CCALSPD CCALSPD is offline
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Ok glad to hear i'm not the only one...
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  #12  
Old 06-12-2013, 02:27 PM
Sammyy90 Sammyy90 is offline
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Transmission

How many miles are you at?


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  #13  
Old 06-20-2013, 06:43 AM
Mattman645 Mattman645 is offline
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sorry, just posted this in the general section and then saw this thread

Had an incident last night on my home in the 645ci auto - pulled out on to dual carriageway and accelerated hard, at approx 4k revs, i got a fairly violent gear change and a "Transmission Error" message on the idrive. I pulled over, turned the car off, restarted and the message went away.

I took the car to a friendly garage who read the codes and found an error on the 4th/5th gear ratio selector (or something along those lines). They have suggested the only cure is a full rebuild of the box.

Driving the car this morning in auto/sport/manual i can't replicate the fault unless i'm giving it full beans in auto mode - manual changes between 4th and 5th are ok along with sport. I managed to get the violent gear change once, but no error this time.

I don't want to go to BMW and their ridiculous charges, So before committing to a rebuild, does anyone know if this is just a case of the gearbox getting confused and won't affect normal driving or impending doom with the box liable to blow at any sec?

So do you think a transmission oil change would be worth a try first before going for a rebuild?
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  #14  
Old 06-20-2013, 07:29 AM
CCALSPD CCALSPD is offline
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I'm at 88,000
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  #15  
Old 06-20-2013, 08:28 AM
Sammyy90 Sammyy90 is offline
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Transmission

I've been having this problem for a while now and I've put about 10k miles on the car it's it first happen. I refuse to find out what's wrong or fix it lol. I just drive very slowly in the car and I'm planning on selling it soon.


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  #16  
Old 06-20-2013, 09:03 AM
Mattman645 Mattman645 is offline
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OK - to be honest thats what i was thinking too - just hope whoever comes to buy it doesn't give it big rpm on the test drive!

Good to know it doesn't sound terminal then - i guess the 30sec gearbox reset makes no difference - although i'll still try it tonight
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  #17  
Old 06-20-2013, 09:37 AM
Sammyy90 Sammyy90 is offline
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Transmission

Ya just drive the car as normal, I think my problem is at 2-3 rd gear cause if I has it at 65 Ish is when I experience the code ! But if you restart the car it goes away as if nothing ever happen ! Your good for at least another 10-15 k miles from experience! Mine hasn't died yet. And I have 165k miles on my 05 645 !


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  #18  
Old 06-22-2013, 01:11 PM
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07 E63650i 07 E63650i is offline
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Transmission

Quote:
Originally Posted by Sammyy90 View Post
Ya just drive the car as normal, I think my problem is at 2-3 rd gear cause if I has it at 65 Ish is when I experience the code ! But if you restart the car it goes away as if nothing ever happen ! Your good for at least another 10-15 k miles from experience! Mine hasn't died yet. And I have 165k miles on my 05 645 !


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Officially the highest mileage 6 I have seen so far! How's it holding up?


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  #19  
Old 06-22-2013, 01:13 PM
Sammyy90 Sammyy90 is offline
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Transmission

It's still kickin! Lots of problems but I've managed to keep it, it's paid off so I figure why not. I called the dealer today and they said that I probably wouldn't need a transmission rebuild and that a lot of times the gear shifting could mean a number of things, including a bad battery or a component in the tranny. I'm gonna drop it off next week, ill keep you guys updated !


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  #20  
Old 06-24-2013, 01:54 PM
Mattman645 Mattman645 is offline
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Another failure message this morning - I'm biting the bullet and got it booked into a transmission specialist fir diagnosis and repair. Can't bear not being able to use the power, it's not going to be cheap but at least I know it will be fixed. My car only has 63,000 miles
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  #21  
Old 06-24-2013, 10:48 PM
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07 E63650i 07 E63650i is offline
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Transmission

Quote:
Originally Posted by Mattman645 View Post
Another failure message this morning - I'm biting the bullet and got it booked into a transmission specialist fir diagnosis and repair. Can't bear not being able to use the power, it's not going to be cheap but at least I know it will be fixed. My car only has 63,000 miles
63k miles is way too early for a transmission failure!


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  #22  
Old 06-25-2013, 06:54 PM
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Spyder Spyder is offline
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Had a slow leak from the tranny pan at about 45k mi on my '07 coupe. I was getting ready to change the tranny oil--rec by Mike Miller and other techs I know--so I just had the pan replaced, and the fluid renewed, under my platinum extended warranty. The tranny has never given me any problems aside from that one leak.

BTW, hydraulic unit in the adaptive sway bar had been sweating fluid since the car was new, but bmw refused to authorize a replacement under the factory warranty. So I made a claim for that at the same time as the tranny repair, and my ext warranty co (mercury) authorized replacement of the steering rack as well

Spyder
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  #23  
Old 06-26-2013, 04:46 AM
Boaf 32 Boaf 32 is offline
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All, this sounds earily similar to my 07 650i drop top problem. Here is the link. I am thinking of having the fluid "half Changed" (I prefer full service) to maintain viscosity. The transmission does not change gears correctly when slowing, and then stalls. No error codes, no smoke out the tailpipes from worn CCV, and with the A/C on, stalling is more prevelent. Think I will have it completely changed! Would like to hear your thoughts !!!
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  #24  
Old 06-28-2013, 04:11 AM
Mattman645 Mattman645 is offline
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Just got mine back from the transmission guys - checked over, the mechtronic ECU in the gearbox sump is showing very early stages of wear apparently - all codes have been cleared and given a clean bill of health (for now)
Have been advised if i treat her well and don't boot it, it should be fine, if i start driving like a tw@t and giving it full throttle everywhere it will fail (but no telling how long that will take)

So i just better keep it sensible for now - as it was only happening on full throttle between 4th and 5th (85-90mph) it shouldn't be too hard
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  #25  
Old 07-18-2013, 07:52 AM
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amennrahh amennrahh is online now
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Mein Auto: 2005 BMW 645ci
Quote:
Originally Posted by Mattman645 View Post
Just got mine back from the transmission guys - checked over, the mechtronic ECU in the gearbox sump is showing very early stages of wear apparently - all codes have been cleared and given a clean bill of health (for now)
Have been advised if i treat her well and don't boot it, it should be fine, if i start driving like a tw@t and giving it full throttle everywhere it will fail (but no telling how long that will take)

So i just better keep it sensible for now - as it was only happening on full throttle between 4th and 5th (85-90mph) it shouldn't be too hard
The Mechatronic unit in the Bimmer is comprised of several pressure solenoids. I would replace those before attempting a transmission rebuild or replacing the entire Mechatronics ECU. I had similar issues with my tranny until I decided to do a bit of research and found an article located in the 7Series forums where a gentleman had replaced the mechatronics solenoids. I decided to replace my solenoids myself which cost me about 400 dollars and 3 hours of my time in the garage. Needless to say, it's been a few months and about 8k miles and I have had no problems since.
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