What the fuck was that noise?

"Supreme Chancellor and Glorious Leader SaveTheIntegras" (jegoingout)
10/12/2016 at 10:34 • Filed to: None

So I was driving my jobs 330xi manual and came to a red light. I put the car into neutral, foot off the clutch and just chilled. When the light turned green I had no issue getting going then when I went to shift from 1st to 2nd all I heard was a loud “CLUNK” combined with the car shuttering. The car didn’t repeat the noise from 2nd to 3rd or 3rd to 4th. At another stop sign the “CLUNK” happened again from 1st to 2nd.

Am I just utterly fucking up my shifts or is this car a mechanics dream?

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DISCUSSION (17)

66671 - 200 [METRIC] my dash > Supreme Chancellor and Glorious Leader SaveTheIntegras
10/12/2016 at 10:38

I have no idea but are you rev matching? Maybe it would help, idk.

Takuro Spirit > Supreme Chancellor and Glorious Leader SaveTheIntegras
10/12/2016 at 10:39

Blinker fluid was low.

Supreme Chancellor and Glorious Leader SaveTheIntegras > Takuro Spirit
10/12/2016 at 10:40

Jokes on you, this came without the optional directionals

Takuro Spirit > Supreme Chancellor and Glorious Leader SaveTheIntegras
10/12/2016 at 10:41

Post build sheet, naow

Textured Soy Protein > Supreme Chancellor and Glorious Leader SaveTheIntegras
10/12/2016 at 10:44

The non-M E90 cars have a clutch delay valve that’s supposed to make up for crappy driving but usually just makes the 1-2 shift clunky. The M3 has a “valve” that’s actually just an empty housing to make sure the hydraulic hose fits in the same place without being stretched. You can remove a part from the non-M one to make it stop the delay, get a modified one, or an M3 one. I have a modified one and it smoothed out the shifts a lot.

EL_ULY > Supreme Chancellor and Glorious Leader SaveTheIntegras
10/12/2016 at 10:48

Kinja'd!!!

Supreme Chancellor and Glorious Leader SaveTheIntegras > EL_ULY
10/12/2016 at 10:51

Accurate description of my daily life

Vicente Esteve > Supreme Chancellor and Glorious Leader SaveTheIntegras
10/12/2016 at 10:57

I’ve never seen that color on the E90.

petebmwm > Supreme Chancellor and Glorious Leader SaveTheIntegras
10/12/2016 at 11:18

guidbo, center driveshaft support bearing, throw out bearing.....

Supreme Chancellor and Glorious Leader SaveTheIntegras > Vicente Esteve
10/12/2016 at 11:42

Its hideous

Supreme Chancellor and Glorious Leader SaveTheIntegras > petebmwm
10/12/2016 at 11:42

So mechanics dream

bltoe > Supreme Chancellor and Glorious Leader SaveTheIntegras
10/12/2016 at 12:29

I’d agree with some of the above...guibo, CSB, possibly driveshaft U-joint, etc.

It goes into gear smoothly, correct? That 1->2 shift has the potential for a lot of change in forces. Have you experimented with on/off throttle at speed? For example, accelerate hard in 2nd or 3rd and quickly release the throttle to coast, staying in gear. See if you can replicate the clunk in other situations. Of course, getting the car up in the air for a visible inspection will be very helpful.

If it is the guibo or CSB, it is a relatively easy and cheap fix for the DIYer.

Supreme Chancellor and Glorious Leader SaveTheIntegras > bltoe
10/12/2016 at 12:31

It goes into gear smoothly with no resistance.

I don’t have the time to really dig into the car sadly, but I wish I could. I’m just trying to find out so I can inform my boss so it can be resolved

bltoe > Supreme Chancellor and Glorious Leader SaveTheIntegras
10/12/2016 at 12:39

Then it sounds like somewhere along the driveline a part designed to absorb energy transfers has failed. Is there any vibration transmitted to the cabin?

Other possibilities that come to mind are motor/trans mounts....maybe diff mounts. Shouldn’t (hopefully) be too costly of a repair. Keep us posted!

Supreme Chancellor and Glorious Leader SaveTheIntegras > bltoe
10/12/2016 at 12:40

The car didnt shutter or shake, but that CLUNK could be heard with the windows up and through the conversation I was having with my co worker

Vicente Esteve > Supreme Chancellor and Glorious Leader SaveTheIntegras
10/12/2016 at 13:20

I think that the horrid amber signals are what makes it look worse. I do like burgundy.

petebmwm > Supreme Chancellor and Glorious Leader SaveTheIntegras
10/12/2016 at 17:00

it’s wear and tear...but yeah...