F30POST
F30POST
2012-2015 BMW 3-Series and 4-Series Forum
BMW Garage BMW Meets Register Today's Posts
BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N55 Turbo Engine / Drivetrain / Exhaust Modifications > Torque converter noise!!
GetBMWParts
Post Reply
 
Thread Tools Search this Thread
      09-01-2023, 10:33 PM   #1
thesleepclinic
Registered
thesleepclinic's Avatar
United_States
0
Rep
4
Posts

Drives: BMW F30 335i
Join Date: Sep 2023
Location: New Jersey

iTrader: (0)

Torque converter noise!!

Has anyone experienced this before? It only happens when the car is in D and at a stop with my foot on the brake and sometimes in R. It shifts fine with no problem. I either give it some gas or let off for it to stop. Video of sound
Appreciate 0
      09-04-2023, 06:03 PM   #2
rlesko
Lieutenant
240
Rep
496
Posts

Drives: F30 335i
Join Date: Jan 2023
Location: New England

iTrader: (1)

Garage List
2012 335i  [0.00]
how do you know its coming from the torque converter...?
Appreciate 0
      09-04-2023, 06:21 PM   #3
thesleepclinic
Registered
thesleepclinic's Avatar
United_States
0
Rep
4
Posts

Drives: BMW F30 335i
Join Date: Sep 2023
Location: New Jersey

iTrader: (0)

I changed the oil pan gasket and the sound was loudest where the torque coverter is.
Appreciate 0
      09-05-2023, 09:05 AM   #4
Eschmacher
Car Hypochondriac
Eschmacher's Avatar
United_States
335
Rep
903
Posts

Drives: 2014 335i M-Sport Estoril Blue
Join Date: Feb 2017
Location: Sterling, VA

iTrader: (0)

Garage List
2014 BMW 335i  [0.00]
PCV failure causes a squeal from the crank hub seal usually but maybe yours is coming from the rear main seal? Have someone open the oil cap when the sound happens, if it is PCV failure, the sound will stop.
__________________
Power mods: VRSF IC/Catted DP - FTP CP/BP - AFE Cat-back - BM3/XHP - Dorch S2
Handling mods: Koni yellow - Eibach prokit - Millway street - M Performance LSD - M3 brakes - EBC bluestuff
Exterior: Euro LCI tail lights - Shitty ECS CF spoiler - Chinese M performance diffuser
Interior: Bavsound stage 1 and subs - custom trunk sub by Mike1327
Appreciate 0
      09-06-2023, 07:38 PM   #5
thesleepclinic
Registered
thesleepclinic's Avatar
United_States
0
Rep
4
Posts

Drives: BMW F30 335i
Join Date: Sep 2023
Location: New Jersey

iTrader: (0)

Quote:
Originally Posted by Eschmacher View Post
PCV failure causes a squeal from the crank hub seal usually but maybe yours is coming from the rear main seal? Have someone open the oil cap when the sound happens, if it is PCV failure, the sound will stop.
The sound only happens when it's in D or R so it's kind of hard to get it to make the sounds. Hopefully the links work https://photos.app.goo.gl/LY6kzCQ3iyXY6KMCA
Appreciate 0
      10-07-2023, 03:30 PM   #6
UhhItsANT
Captain
United_States
80
Rep
664
Posts

Drives: 2013 BMW 335i
Join Date: Sep 2012
Location: Bay Area, CA

iTrader: (2)

Garage List
2013 BMW 335i  [0.00]
Have you found the cause and fixed this issue yet? Mine just started making the exact same sound.
Appreciate 0
      10-08-2023, 07:15 AM   #7
Polo08816
Brigadier General
1616
Rep
3,958
Posts

Drives: 2014 335i M Sport
Join Date: Sep 2010
Location: MD

iTrader: (0)

Quote:
Originally Posted by thesleepclinic View Post
Has anyone experienced this before? It only happens when the car is in D and at a stop with my foot on the brake and sometimes in R. It shifts fine with no problem. I either give it some gas or let off for it to stop. Video of sound
Quote:
Originally Posted by rlesko View Post
how do you know its coming from the torque converter...?
Have you put it in neutral and pressed on the brakes to see if you get the sound as well?
Appreciate 0
      10-09-2023, 07:46 PM   #8
yupetc
Captain
399
Rep
666
Posts

Drives: 2015 X535i
Join Date: Feb 2013
Location: Houston, TX

iTrader: (0)

It sounds like crankcase whistle more than the torque converter to me, and crankcase whistle comes from compromised PCV diaphragm, front main seal, or rear main seal. If you're really hinged in on torque converter side, then very likely the rear main seal is the culprit. I'm saying that because I believe that when your oil pan gasket is leaking pretty badly, it opens up the crankcase ventilation and you probably don't hear the whistle noise being too announced. Now that you've put on a new oil pan gasket and really sealed that part of hte crank case, the next leaky place will whistle during hard vacuum, namely, during idle when the throttle chokes the hardest. So in this case, rear main seal makes most sense.

If for whatever reason rear main seal isn't the cause of this and it has to be a guess with the torque converter side of things, I'd reckon either the flox plate is bent or torque converter is somehow binding and the tongue is gotta be rubbing somewhere on the bushing between the converter and the oil pump unit. But with this you should also experience some pretty bad shaking or rattling from the torque converter side.
__________________
2015 X535i - CP Piston, Manley Rod, ACL/King bearings, MILVs VRSF full charge Pipe, Wagner FMIC, Hybrid Turbo, MHD2+ VRSF DP, UR Front/Rear Sway Bars, Eibach springs, Bilstein B6
2015 MINI COOPER - Mahle Pistons, Max Rods, BMS intake, CTS charge pipe, Wagner Intercooler, ByteTronik Tune, VRSF DP
2017 540i - MHD2+, VRSF DP, TU Pump
Appreciate 0
Post Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 02:50 PM.




f30post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST