Very scary knocking sound from back of the car

[jb92563]

Is it a manual or automatic transmission?
What Year car?

From what I have been reading the Manual transmissions are fairly reliable and robust but the automatics may have had a bit of problems in some cases.

Automatic will be expensive and manual not quite so much usually.

Sorry for the bad luck.
Take the knife to the police station for finger print matching, file a police report on the damage sustained including that the transmission is now damaged and then see if your insurance covers transmission damage due to vandalism

With a bit of luck the vandal may have saved you the cost of repairing the transmission on your own dime since he broke in to your vehicle and did who knows what to damage the transmission.

[tobiasr]

Originally Posted by jb92563

Is it a manual or automatic transmission?
What Year car?

From what I have been reading the Manual transmissions are fairly reliable and robust but the automatics may have had a bit of problems in some cases.

Automatic will be expensive and manual not quite so much usually.

Sorry for the bad luck.
Take the knife to the police station for finger print matching, file a police report on the damage sustained including that the transmission is now damaged and then see if your insurance covers transmission damage due to vandalism

With a bit of luck the vandal may have saved you the cost of repairing the transmission on your own dime since he broke in to your vehicle and did who knows what to damage the transmission.

Manual 986 from 1998, think it will be hard getting a stabbed plastic window to cover any engine reparis since he never was in the car.

[rene525d]

Are you sure its from the wheel? A failing serpentine belt can be intermittent and causes a knocking noise as it will be slipping on and off the pulleys. I suggest you have a look at the belt. Generally it fails around 60k miles.

[The Radium King]

i guess the hooker wasn't dead after all ...

[tobiasr]

Originally Posted by rene525d

Are you sure its from the wheel? A failing serpentine belt can be intermittent and causes a knocking noise as it will be slipping on and off the pulleys. I suggest you have a look at the belt. Generally it fails around 60k miles.

I dont think it was the wheel anymore since it only sounds when i have a gear engaged, changed serbetine belt a year ago and have gone 50k, will take a look on that! But does it make sense that is only sounds when hot and gear in?

Originally Posted by The Radium King

i guess the hooker wasn't dead after all ...

what? Oh now i get it

[Ghostrider 310]

Speed sensitive knock (one that increases frequency with vehicle velocity not a raise in engine revolutions) is likely rotational, in other words CV joint, wheel bearing, rotor pad, tire wheel.

[tonycarreon]

is it anything like what i experienced?

slow cruising:
constant noise 2 - YouTube

driving "at speed":
boxster constant noise from brakes - YouTube

[bar10dah]

Originally Posted by The Radium King

i guess the hooker wasn't dead after all ...

I doubt a hooker would fit, even in the front trunk. Well, maybe if it was a midget hooker. However, how about a trunk monkey?

Trunk Monkey Compilation - YouTube