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-   -   Clunk from rear (http://www.bimmerfest.com/forums/showthread.php?t=656413)

mikee30 11-06-2012 03:00 AM

Clunk from rear
 
Hi,
I am trying to find the cause of this issue and was looking for some help. The truck is a 2007 X3si.

If I slow down to 0-5mph and then take off, I get a clunk from the rear of the truck. Same thing sometimes happens when I take off from a complete stop. It does not happen when slowing down to higher speeds.

The car had a new rear diff installed for other reasons and the problem is still there.

Any ideas on what I should be checking?
Car has new rear brakes for what it's worth (problem was there before and after brake change).

Thanks

dougsBMW 11-06-2012 03:07 AM

I just got the exact vehicle- and unfortunately, I have the exact issue. I was reading that there may be a software update needed for the trans. If someone knows PLEASE let us know how to fix this annoying issue.

new_e46 11-06-2012 04:04 AM

I had this issue on my 07 X3. I took the X3 to the dealership and ask them to reprogram the car. I haven't had this issue after the reprogramming. Hope this helps

x3brian 11-06-2012 05:27 AM

The very first thing that I would do is check and change differential fluid. The rear diff doesn't hold much....about 3/4 of a quart. If it wasn't filled up a clunk back there has been reported in the past.

This is an easy DIY.

mrsanchez3 11-06-2012 06:11 AM

I have an '05 so it's likely different, but I was getting a similar clunk under similar conditions. I changed my front/rear diff fluid and TC fluid.

I changed the TC fluid as specified here:

http://tis.spaghetticoder.org/s/view.pl?1/09/55/16

The clunk seems to be completely gone now.

hassen 12-24-2012 09:53 AM

clunk from rear
 
Hi everybody I am new here. And have this problem I have a 06 2l diesal and when ever I come to a stop the is a slight clunk clunk a double clunk this and when I accelelarate into 3rd gear there is a slight slip my mac here in sa has redone the clutch and charged me R10k now when the noise came back went to the mac and made a big hoo haa X3 going in on the 7th jan so I want to get an idea of what is wrong before they rip me off again so I know what is he talking about as I am not tec minded in cars but will learn from all the great posts here according to the mac he says it is a bearing in the rack and pinion that is worn out thanks everbody keep it up

x3brian 12-24-2012 11:08 AM

Hassan--$1,200 us $ isn't unheard of for a new clutch...might have been time anyway, depending on your driving style. I would have then check rear differential fluid and guibo....especially if the clunk happens while accelerating.

UncleJ 12-25-2012 07:53 AM

+1! Hassan, a clutch is a "wear" item that needs to be replaced just like tires or brakes (just not as frequently). If you can get 100K miles out of a clutch disc, pressure plate, and throw out bearing than you have done just about what they are designed for with moderate driving. Now then, you can also spin a clutch in an afternoon if you really put your mind to it and are driving in the right conditions~!:D Of course you will find folks who have gotten much more than 100K miles out of their clutch too. My wife got 120K miles out of her 325e clutch and it was still fine when we sold the car. Of course that was very moderate city driving (back and forth from one shopping center to another:rofl:).:angel:

hassen 01-08-2013 10:29 AM

Hi got the clunk out moved to another mac and replaced transfer case oil from bmw dealership as well as front and back diff oil noise gone thanks guys another new problem I encounted was when x3 was hot and came to a stop it would not roll back seems as if brakes we licked only does this when hot . Ant ideas what could be prob the prev owner never looked after the suv and the tc oil was black also noted the the mags had pores in them so going to have them powder coated any idea if I shoud go daker with the powder coat or stick orig will try to upload pic as I wanted to put alpina reps the new design but could not get 17 in this and X3 are know for clunk noises when tyres are changed also common prob

hassen 01-08-2013 10:39 AM

2 Attachment(s)
Darker!

hassen 01-08-2013 10:41 AM

Anybody need the part number for tc oil buzz me will post it

mrsanchez3 01-08-2013 10:48 AM

Quote:

Originally Posted by hassen (Post 7298481)
Anybody need the part number for tc oil buzz me will post it

There's actually one and only one. If it was really black when it was changed, I'd change it again. Mine was REALLY dark at 70k miles with the first change. I changed it a second time a few hundred miles later. It was again quite dark but not as bad. I'm hoping what's in there now looks good enough to last a while. I'll change it probably around 90k miles.

hassen 01-08-2013 10:55 AM

Thanks bud so got to change again a maybe 1000 km to check again

hassen 01-08-2013 10:58 AM

And here in sa they charge us R400 a pop for the tc oil looks like a litre to me but on the inv it says 20 units

mrsanchez3 01-08-2013 10:58 AM

Quote:

Originally Posted by hassen (Post 7298526)
Thanks bud so got to change again a maybe 1000 km to check again

Yeah, I say do it... It's cheap insurance in my opinion... and, I swear it felt MUCH better after the first change. And, still a little better after the second change...

Cheers!

mrsanchez3 01-08-2013 11:01 AM

Quote:

Originally Posted by hassen (Post 7298537)
And here in sa they charge us R400 a pop for the tc oil looks like a litre to me but on the inv it says 20 units

I don't know the currency conversion rates. In the US I can buy the fluid for about 30 dollars. It's easy to change and I filled it till it ran out the fill hole. Took almost the entire liter.

hassen 01-08-2013 11:03 AM

Very true also felt improvement in power for some strange reason

hassen 01-08-2013 11:07 AM

Exchance rate is aprox 7.5 and the VW dealership has offered me an 07 3ld auto at R200k as I hace a citroen c2 to trade in at R50k which is for the lady of da house but she finds x3 a bit big as from her c2

hassen 01-10-2013 10:55 AM

Hi everyone wanted to know if anybody having this issue on x3 when hot and parked on an incline the brakes tend to hold the car and this happens only while hot when cold and come to incline the car will roll back when in neutral mine is a manual then thereis slight resistance when pulling off I think there was a feature on the x3 which hold the car until you put it in gear but mine does not have this feature ant ideas

Supercourse 01-10-2013 01:21 PM

Quote:

Originally Posted by mrsanchez3 (Post 7298547)
....... In the US I can buy the fluid for about 30 dollars.

That's a really good price.

From ECS Tuning it's $42.80, and when I got one from the dealer 3 years ago it was $55 + tax.

mrsanchez3 01-10-2013 05:16 PM

Quote:

Originally Posted by Supercourse (Post 7303991)
That's a really good price.

From ECS Tuning it's $42.80, and when I got one from the dealer 3 years ago it was $55 + tax.

Yeah, I know... Crazy, right? My local dealer is TheBMWStore.com

I just looked at my last receipt for it from October. It was actually exactly 30 dollars plus tax. I even asked them at the time if they were sure it was correct... They insisted it was and I took a screen shot of the part number with me... I was going to buy it from BavAuto. I just asked the dealer for fun... That made it a lot easier to swallow changing it twice.


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