|
|
|
02-04-2019, 09:11 PM | #23 |
Beachtown Bill Collector
582
Rep 1,062
Posts
Drives: 2012 135i
Join Date: May 2011
Location: San Diego
|
Unless you're thinking about a 335is, the 335i comes with a conventional torque converter automatic.
|
Appreciate
0
|
02-04-2019, 09:18 PM | #24 | |
Major General
43574
Rep 7,224
Posts |
Quote:
I believe the DCT was offered on the N54 335i in Europe, though.
__________________
|
|
Appreciate
0
|
02-04-2019, 11:13 PM | #26 |
Beachtown Bill Collector
582
Rep 1,062
Posts
Drives: 2012 135i
Join Date: May 2011
Location: San Diego
|
The video outlines the pan itself being replaced. I had new fluid put in when my pan gasket and the other mechatronics unit gasket were replaced due to leaks. I have to assume most of the fluid comes out in such cases.
|
Appreciate
0
|
02-04-2019, 11:36 PM | #27 |
Private First Class
61
Rep 126
Posts |
|
Appreciate
0
|
02-04-2019, 11:38 PM | #29 | |
Private First Class
61
Rep 126
Posts |
Quote:
|
|
Appreciate
1
tock172581.50 |
02-05-2019, 12:22 AM | #30 |
Major General
43574
Rep 7,224
Posts |
Did you get a chance to see the fluid that came out of your transmission, or did they tell you the condition of it, like how dirty it was? Also, how many miles did you have at the time of changing? I'm at almost 41k miles. The fluid in the video here was at ~30k and didn't look so good.
__________________
|
Appreciate
0
|
02-05-2019, 12:53 AM | #31 | |
Private First Class
61
Rep 126
Posts |
Quote:
|
|
Appreciate
0
|
02-05-2019, 04:08 AM | #32 | |
Brigadier General
1541
Rep 3,071
Posts |
Quote:
So there are bound to be a few high mileage vehicles out there. I'm at 65k & have been thinking about whether to do the DCT & diff fluids sometime fairly soon.
__________________
2011 135i w/ DCT | ZSP Sport Pkg | PPK | Ohlins R
|
|
Appreciate
0
|
02-05-2019, 04:12 AM | #33 |
Brigadier General
1541
Rep 3,071
Posts |
Apparently the Getrag dual-clutch transmissions are also used in the BMW M3, BMW 335is, BMW Z4 (E89) sDrive35i, Dacia Duster EDC, Ferrari California, Ferrari 458 Italia, LaFerrari, Mercedes-Benz SLS AMG, Mitsubishi Lancer Evolution X, Mitsubishi Lancer Ralliart, Ford Fiesta, Ford Focus, Renault Megane, Renault Scenic, smart fortwo, Volvo V40, Volvo V60 Volvo V70 vehicles.
__________________
2011 135i w/ DCT | ZSP Sport Pkg | PPK | Ohlins R
|
Appreciate
0
|
02-05-2019, 12:27 PM | #34 | |
Banned
114
Rep 334
Posts |
Quote:
A flush of a DCT box isn't a problem due to it is just a box of gears. BTW, Pentosin is a common lubricant used universally by the German auto industry. |
|
Appreciate
0
|
02-05-2019, 12:34 PM | #35 |
Brigadier General
368
Rep 3,547
Posts |
Conventional automatics have a torque converter and torque converters do not, to my knowledge, have drain plugs. So if you pull the pan or pull the plug and change the fluid and hopefully the filter on a conventional automatic you are removing well less than all the fluid. The logic for gear changes in conventional automatics also used to be hydraulic in a valve body. I do not believe that is the way it is done any more. Horror stories about fluid changes in conventional automatics at high mileage makes many leery. The "flush" normally just involves circulating some fluid so the torque converter is changed too.
DCTs are very different and it seems to me more like manuals than automatics mechanically. They are automated manual transmissions. The gear side of them would need a fluid change like a manual transmission needs the fluid change. They have clutches, however, which conventional automatics also have, but I don't see why changing the fluid would harm a clutch. It is a key source of heat so the clutch would logically benefit from new fluid with the additives back at new levels. If I ever own a DCT, I would treat it like a manual. Might do an early change then changes about every 50K miles.
__________________
128i Convertible, MT, Alpine White, Black Top, Taupe Leatherette, Walnut, Sport
Ordered 5/22/09, Completed 6/4/09, At Port 6/9/09, On the Georgia Highway 6/13/09, Ship Arrived Charleston 6/24/09 at 10pm, PCD 7/21/09 |
Appreciate
2
Moveitsmikey61.00 tock172581.50 |
02-05-2019, 12:40 PM | #36 | |
Private First Class
61
Rep 126
Posts |
Quote:
|
|
Appreciate
0
|
02-05-2019, 01:19 PM | #37 | |
Beachtown Bill Collector
582
Rep 1,062
Posts
Drives: 2012 135i
Join Date: May 2011
Location: San Diego
|
Quote:
My log shows that the car had 39k miles when the repair and fluid change was done. I read the page, and at this point, really don't care. It was difficult enough to get the dealer to use new fluid instead of the old stuff and going through the headache of making them do a DCT flush seems like it would have been a pain in the ass with lots of unnecessary added complication. If I keep the car long enough to do another fluid service, I'll see about having my preferred independent garage handle it. In the meantime, I lose no sleep over my DCT transmission and its fluid. Last edited by tock172; 02-05-2019 at 01:26 PM.. |
|
Appreciate
0
|
02-05-2019, 01:22 PM | #38 | |
Beachtown Bill Collector
582
Rep 1,062
Posts
Drives: 2012 135i
Join Date: May 2011
Location: San Diego
|
Here is what I believe to be a comprehensive list of BMWs that could be had with the DCT or M-DCT transmission in the US:
Quote:
At this point, it should be noted that many manufacturers including BMW are moving away from dual-clutch transmissions in favor of the most advanced versions of the tradition torque converter design, like the ZF 8-speed that has infiltrated almost everything at this point. For the next generation of M cars, because BMW is embracing M-xDrive, there is expected to be no DCT availability. |
|
Appreciate
0
|
02-05-2019, 03:02 PM | #39 |
New Member
5
Rep 27
Posts |
I have a 2013 135is with DCT that I bought with 34,xxx on the clock. I am now at 102,xxx miles and I have yet to change the transmission fluid. Shifts are smooth and crisp and I have no issues with the DCT as of yet.
When I bring my car in for an oil change I will inquire with my SA and see if there are any leaks or anything obvious in that area that need to be addressed. |
Appreciate
0
|
02-05-2019, 03:21 PM | #40 |
Brigadier General
368
Rep 3,547
Posts |
The main thing I would worry about from not changing the fluid will not be noticed until it is too late. As the fluid begins to break down, it's lubricating qualities are reduced and bearing wear will go up. I believe the same fluid as goes past the gears and bearings also cools the clutches. That heat load will make the fluid degrade more rapidly than in a manual where the clutch is dry and outside of the transmission. Bearing wear will not make itself known in the first 100K miles. But if you drive it long enough, you may need a complete rebuild where you would not if you change the fluid.
I have changed the fluid twice in my manual so far. I have about 81,500 miles on my car. I cannot see anything about a DCT that would make me change it less often.
__________________
128i Convertible, MT, Alpine White, Black Top, Taupe Leatherette, Walnut, Sport
Ordered 5/22/09, Completed 6/4/09, At Port 6/9/09, On the Georgia Highway 6/13/09, Ship Arrived Charleston 6/24/09 at 10pm, PCD 7/21/09 |
Appreciate
1
Moveitsmikey61.00 |
02-07-2019, 12:44 PM | #41 |
Private First Class
61
Rep 126
Posts |
Can anyone in here confirm if the DCT does indeed use the side suction filter for the transmission like shown in the video but for a 135i? Shops are quoting me without it as I feel they don't even know.
|
Appreciate
0
|
02-08-2019, 08:42 AM | #42 |
Brigadier General
368
Rep 3,547
Posts |
I am not sure I completely understand it but this is the picture from realoem:
http://www.realoem.com/bmw/enUS/show...diagId=28_0005 There is something that looks like a cannister type filter, part 8, that is labeled a pressure filter. Also something labeled a suction filter that looks like what conventional automatics have.
__________________
128i Convertible, MT, Alpine White, Black Top, Taupe Leatherette, Walnut, Sport
Ordered 5/22/09, Completed 6/4/09, At Port 6/9/09, On the Georgia Highway 6/13/09, Ship Arrived Charleston 6/24/09 at 10pm, PCD 7/21/09 |
Appreciate
0
|
02-08-2019, 10:31 AM | #43 | |
Private First Class
61
Rep 126
Posts |
Quote:
|
|
Appreciate
0
|
02-08-2019, 12:48 PM | #44 |
Brigadier General
368
Rep 3,547
Posts |
I use RockAuto a lot. I don't know what parts you priced at $500 at fcp but RockAuto has both filters for well under $100. They charge extra for shipping but it is normal rates.
https://www.rockauto.com/en/catalog/...ic,filter,8600
__________________
128i Convertible, MT, Alpine White, Black Top, Taupe Leatherette, Walnut, Sport
Ordered 5/22/09, Completed 6/4/09, At Port 6/9/09, On the Georgia Highway 6/13/09, Ship Arrived Charleston 6/24/09 at 10pm, PCD 7/21/09 |
Appreciate
0
|
Post Reply |
Bookmarks |
|
|