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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 11-22-2013, 10:44 AM   #21
BMWLOAD
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NoMercy346 - How did the transmission visit go?
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Old 11-22-2013, 10:58 AM   #22
Ugur Ekim
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Im curious also, since every damn specialist say its my torque converter....

i have it also when i drive arround 1600 rpm +-, almost any gear. Higher then 2000+ rpm i dont have this issue at all..

Please show me if you guys fixed this.. i don't wanna waste 400 euro first to get my tranny cleaned up and completly flushed and the problem still exist.. better add extra 400 euro and get a used tranny and flush that one for 400..

Torque converter = bad = buy used tranny

only option right there..
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Old 11-26-2013, 04:36 AM   #23
NoMercy346
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Tranny shop couldnt say for sure either... converter related or something wrong within the valve body, solenoid etc. the guy drove it himself and didn't see the full extent of the problem, though, as you really have to be easy on the throttle. He also called up bmw hq and they also guessed TC causing some kinda pressure loss. They offered to flush the tranny and clean the valve body and solenoids but I'm not sold on that. With the noise it makes i assume some mechanical cause. Other options are new tc or complete rebuild obviously. I'll probably take the guy on another test drive with me driving (last time i was there they were just about to close) and then have them open up the trannny check for shavings an then decide on how to proceed from there
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Old 11-26-2013, 04:41 AM   #24
NoMercy346
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Oh yeah to anyone who has been told it is the TC: does it hurt the rest of the tranny to keep driving it for a week or two?
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Old 11-28-2013, 04:35 AM   #25
NumbaOneNewb
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Rev Problems - HELP!

You guys are having misfiring issues. The rpms drop or bounce around due to car not able to ignite gas so the rpms drop or your engine loses momentum and power. Sometimes it does spark and sometimes it doesn't. Perhaps check your spark plugs and see if they're covers in oil. If so it's your vcg and or ccv plus your spark plugs may need cleaning or changing.
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Old 04-02-2014, 02:13 AM   #26
Count Zero
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Hey guys, I'm having exactly the same problem on my E46 330d, when cruising on uphill. It is happening only on 5th gear, it will start dropping revs.. from 2000 to 1800, just a tiny fraction, but still very annoying. For me the problem is in the tranny, however I'm not sure if it is TC or some of the valves. Mine is also not giving any error codes. From all the opinions I've read, it seems no one knows what is the problem. All are just speculating around it . Only Dan cured his by flushing..I will do the same and will report to you so we double confirm if the flushing is curing the problems. Cheerio
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Old 04-02-2014, 10:06 AM   #27
Count Zero
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Just back from tranny flush. Problemo solved! This worked very well no signs of revs dropping, gears are changing very smooth even under heavy acceleration. Total Cost - $200 for the flush + 9.9l fluid. I can say if you are out of options go for it.
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Old 10-11-2014, 11:30 PM   #28
doesntmatter
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I made this account to post my solution for this problem:

I had this issue since I bought my car 2 years ago. I tried flushing the transmission fluid and it helped but the problem was still there. In an act of desperation I found a used transmission that I was about to replace mine with. I took my car to a shop recommended by a family friend and he checked the codes and found nothing relating to transmission failure. He said that the transmission fluid filter was clogged and found no metal fragments, and I should try replacing the filter before the transmission. After a month of driving, I have not seen any rpm drops and low rumble/vibrations. It's running smooth!

Hope this helps!

Last edited by doesntmatter; 10-11-2014 at 11:32 PM.
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Old 10-11-2014, 11:47 PM   #29
Meintool
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I had the same problem it was definitely the transmission/fluid, felt like the torque converter wouldnt lock up properly and i would get a shutter every time the rpms dropped tranny filter fluid and gasket fixed the problem, oh and i threw in some instant shudder fix because why not?
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Old 12-05-2014, 05:12 PM   #30
antagonising
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Thanks guys, same problem here. Feels like trans wants to lock up but can't. Slight hesitation and same loud drone noise. I'm going to take advice and try and replace trans filter before the new year.
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