|
|
|
|
|
|
BMW Garage | BMW Meets | Register | Search | Today's Posts | Mark Forums Read |
|
BMW 3-Series (E90 E92) Forum
>
335i, transmission issues...
|
|
04-25-2019, 01:26 PM | #45 | ||
Major General
1900
Rep 6,968
Posts
Drives: 2007 Black/Black 335i e90
Join Date: Apr 2011
Location: Holly, MI
|
Quote:
|
||
Appreciate
0
|
04-25-2019, 02:28 PM | #46 |
Enlisted Member
4
Rep 40
Posts |
This is a little out of my comfort zone as I've never toyed with WinKFP but I will try to play around and see if I can figure out how to update it.
|
Appreciate
0
|
04-25-2019, 04:13 PM | #47 | |
Lieutenant
58
Rep 494
Posts |
Quote:
For trans being toast, mine slipped a few times (only MHD stage 1+), and after changing fluid it still slipped for few weeks, but now it does not slip anymore, although I'm sure damage is already done. |
|
Appreciate
0
|
04-25-2019, 04:58 PM | #48 | |
Enlisted Member
4
Rep 40
Posts |
Quote:
|
|
Appreciate
0
|
04-25-2019, 09:00 PM | #49 | |
Gateropode
329
Rep 2,848
Posts |
Quote:
Most rough shifting can be traced to 1. underfilled trans, redo the filling procedure (exactly as described on the ZF documentation, no guess work or half-assed approximation) 2. bad gaskets between the mechatronics, solenoids and the main unit. There are a bunch (6?) round bushes and 2 square bushes between the mechatronic unit and the main body of the trans. Any one failed will not permit pressure to build appropriately 3. bad solenoid(s), not as common, rather expensive, look at replacing them if nothing else works 4. damaged clutch, very uncommon except if you keep driving the slipping trans for a long time (i.e. not fixing the oil-pressure related issues above). Not sure if worth doing rather than swapping the unit. |
|
Appreciate
0
|
04-26-2019, 05:47 AM | #50 | ||
Major General
1900
Rep 6,968
Posts
Drives: 2007 Black/Black 335i e90
Join Date: Apr 2011
Location: Holly, MI
|
Quote:
https://www.amazon.com/dp/B009VI9P62..._32TWCbD5MJ2J5 1) Drain & Change the pan filter as usual. 2) fill pan filter 3) Take a see through, plastic container & mark put 3qts on it with a marker (measure first & then mark) 4) take the engine fan out for more room 5) use tool to unhook the return line from the transmission. If you are unsure, run the car for 5 min. It will be warm, where the other one will not. 6) securely put the open trans line into the see through container. Have someone start the car. When 3 quarts empties into the container shut the car off. 7) put 3 quarts of new fluid into the pan filter 8) repeat process until the fluid coming out of the trans is bright red. (Probably about 3x) 9) on your last fill, do the process of filling the pan filter & then running the car through the gears & doing a final fill between 90 & 120 degrees until the fluid starts to run out of the fill hole. You will probably need 12-14qts |
||
Appreciate
1
litxus58.00 |
04-26-2019, 12:06 PM | #51 |
Lieutenant
58
Rep 494
Posts |
Yes, initially it had 0 effect, but after a month or so driving (I drive very few miles a day like 10), it stopped. Before if I floor it in 2nd gear or so, sometimes it would jump to 6 (have xhp flash). I had no issues recently even when going WOT.
|
Appreciate
0
|
04-26-2019, 12:12 PM | #52 | |
Lieutenant
58
Rep 494
Posts |
Quote:
|
|
Appreciate
0
|
04-26-2019, 01:56 PM | #53 | ||
Major General
1900
Rep 6,968
Posts
Drives: 2007 Black/Black 335i e90
Join Date: Apr 2011
Location: Holly, MI
|
Quote:
So, if you take off the initial line going to the trans cooler coming from the trans (torque converter) you will be getting rid of all the crappy/ old oil in that torque converter. |
||
Appreciate
0
|
04-26-2019, 04:08 PM | #54 |
Enlisted Member
4
Rep 40
Posts |
Does anybody know if the valve body from the 6hp21 and 6hp28 are for sure interchangeable? All the rebuilt valve bodies I see for sale seem to fit both, but I just want to be sure. I ask because I also plan on refreshing the valve body with the sonnax zip tie kit, along with the solenoids and gaskets. If it doesn't solve my problem I plan to upgrade to a 6hp28, but i just I would like to not throw 500 out the window and carry over the solenoids, gaskets, and zip tie to the 6hp28.
Also, sorry if this is a dumb question, but is there a difference between swapping with M-Shift and E-Shift? I figured out I have the M-shift but I was wondering if it the 6hp28 also has to be m-shift when I swap, that's all. Last edited by byte[]; 04-26-2019 at 04:29 PM.. |
Appreciate
0
|
Bookmarks |
Thread Tools | Search this Thread |
|
|