Very scary knocking sound from back of the car

[tobiasr]

Originally Posted by tonycarreon

is it anything like what i experienced?

slow cruising:
constant noise 2 - YouTube

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

Sounds like the first video, any idéa what that was?

[jb92563]

Start checking the cheapest stuff first like the transmission mounts, rotors and CV/axle joints, or tire damage on the inside walls while your under there.

Once those are eliminated it will be much cleared whether its the transmission or not.

Transmission is not that likely unless somesone have been abusing it, but CV joints could be especially if the rubber boots have holes and letting abrasive material into that area.
Wheel bearings are another more common possibility.


Bar10dah: Love that Trunk Monkey, laughed for a good 5 minutes.

[stateofidleness]

I've got a bill staring at me on my desk for $7,600 to replace my Tip transmission ('00 base w/ Tip. 74k miles). Hope this isn't the situation you're in.

If you put it in gear up on jack stands (not that safe I know, but if done with car, can be done), have some put it into gear and check out the offending wheel more closely. Maybe take the wheel off and see if it still does it (again, on jack stands).

[black_box]

Originally Posted by stateofidleness

I've got a bill staring at me on my desk for $7,600 to replace my Tip transmission ('00 base w/ Tip. 74k miles). Hope this isn't the situation you're in.

If you put it in gear up on jack stands (not that safe I know, but if done with car, can be done), have some put it into gear and check out the offending wheel more closely. Maybe take the wheel off and see if it still does it (again, on jack stands).

sounds like a lot for a trans... $2700 was my cost to rebuild on a 6 speed, are tips that much more?