Funny noise in 996TT

[oar911]

Hi all, Just wondering if anyone could shed light on this for me. The last couple of times I've left my car standing for a few days and then moved off I hear what can only described as a thud coming from the rear of the car - possibly wheels. Could this be something to do with the brakes by any chance? only a complete guess as its got me baffled?!?

[Silver993tt]

it might be your rear brake shoes binding after a period of standing still.

[Vesuvius 996]

Check the wheelnuts.

[etlprws]

Sounds like your rear brake pads are binding to the disks as they are applied by the handbrake. Usually happens if the disks are damp when you park up.

When I leave my car for more than a couple of days I leave the handbrake off and put it in gear.

[Crimp a Length]

brakes.

[Silver993tt]

etlprws said:

Sounds like your rear brake pads are binding to the disks as they are applied by the handbrake. Usually happens if the disks are damp when you park up.

When I leave my car for more than a couple of days I leave the handbrake off and put it in gear.

I thought the 996 (as in the 993 & Boxster) used dedicated brake shoes for the handbrake? I remember my Boxster S doing this and it was the handbrake shoes binding, the pads aren't operated by the handbrake at all.

[etlprws]

Silver993tt - I bow to your superior knowledge of the TT brakes! :-)

Is it like the handbrake on a Land Rover, i.e. works on the prop shaft?

I shall go and have a crawl around under my car in a minute to have a look.

So...correction....sounds like the brake 'shoes' binding! Still recommend leaving the handbrake off when leaving the car for more than a couple of days.

[Silver993tt]

etlprws said:

Silver993tt - I bow to your superior knowledge of the TT brakes! :-)

Is it like the handbrake on a Land Rover, i.e. works on the prop shaft?

I shall go and have a crawl around under my car in a minute to have a look.

So...correction....sounds like the brake 'shoes' binding! Still recommend leaving the handbrake off when leaving the car for more than a couple of days.

My Boxster S had small drums as part of the hub if I remember correctly and the shoes were in these hubs. I think it's quite a common problem if the car has been standing and there is some moisture around because the moisture gets into the drum. I used to drive the car to about 20mph and gently apply the handbrake for about 5 secs to 'clean' the shoes in the drum. Seemed to improve the situation for me.

[Porsche Tech]

All models with rear disc brakes and the hand brake with in the disc, the bell of the disc acts as a drum, god only knows where the idea of a Land Rover transmission brake came from.

The problem is probably just the disc pads sticking to the discs.