e46 clunk / crack noise when reversing

[Pho3niX90]

Hi Guys,

As the title says, sometimes when I reverse I hear a loudish clunk / crack noise, it's not depended on speed and usually happens when I start to reverse.

 

[OppositeLockMT]

I used to get something similar to this. Everytime I would stick it reverse I would get an audible "ping", apparently it was something to do with my diff.

 

[Bazza]

I used to get something similar to this. Everytime I would stick it reverse I would get an audible "ping", apparently it was something to do with my diff.

The audible ping in the car is telling you that the PDC is engaged.

 

[e46jase]

on an 05 model i would not expect subframe mounting but its worthwhile checking it out. mine tore but i have a 99 model e46 which was known for the subframe issue

could also be diff bushing

put car up on lift at super quick or something and you will know straight away if it is one of those two by looking at them.

diff bushings usually give you a clunk noise when u shift as well

Hi Guys,

As the title says, sometimes when I reverse I hear a loudish clunk / crack noise, it's not depended on speed and usually happens when I start to reverse.

 

[Warren16]

Having the same problem at the moment on my E90...

Spoke to some of the guys from the forum yesterday & majority says it the drive shaft / diff bushings / carrier bearing.

im having it cjecked out this weekend. Good Luck with sorting yours out as well :thumbs:

 

[RowenS]

On the e46 M, this is absolutely normal, been there, done that, mailed BMW SA, mailed BMW Germany...had that "clunk" for many years, no issue at all.

 

[Executer]

On the e46 M, this is absolutely normal, been there, done that, mailed BMW SA, mailed BMW Germany...had that "clunk" for many years, no issue at all.

I would also say its quite normal, drove a 318 e46 for two weeks while wating for my car, and noticed it there, and even with my car and the auto box, when you put it in reverse, there a clunk and sometimes when you start reversing there`s another slight thud from the drivetrain as it engages....

 

[OppositeLockMT]

I used to get something similar to this. Everytime I would stick it reverse I would get an audible "ping", apparently it was something to do with my diff.

The audible ping in the car is telling you that the PDC is engaged.

Ofcourse. The "Ping" I am referring to was mechanical: diff bushings.

 

[Bazza]

I used to get something similar to this. Everytime I would stick it reverse I would get an audible "ping", apparently it was something to do with my diff.

The audible ping in the car is telling you that the PDC is engaged.

Ofcourse. The "Ping" I am referring to was mechanical: diff bushings.

OOOOOH, sorry, not the sound beep from the PDC. My bad!

 

[Pho3niX90]

Oh I see, one other thing as well that might be related, when suddenly put pedal to medal it feels like the whole gearshifter moves backwards, almost like the gearbox is moving away from the engine??

 

[Pho3niX90]

Anyone?>

 

[SP33DYV]

Put your car on a lift and inspect g'box mountings, diff bushes and the guibo. All of these could cause an issue. Also check the universal joint on the propshaft for excessive play. Also check the engine mountings. All of these can cause a thud.