Rattling under gear braking - any ideas?!!?

[wacattack]

I have recently noticed a rattling when braking using the gears. It occurs above about 2500 revs and is most obvious in 5th and 3rd gear.

Any ideas?

[jasandjules]

Without meaning to be offensive, my first idea is brake using the brake pedal not the gears (the first thing a racing driver taught me on a racing driver day thing...)... Using the gears can knacker them....

[wacattack]

Im not actually engine braking but said that to describe when it occurs. What I mean is when im drving and lift the throttle off, the noise occurs then, when the car is driving without any pressure on the accelerator

[jasandjules]

Ah.

Does it do this when idling? Could be the gearbox is on the way out, or needs oiling.. Does it have problems finding reverse?

[wacattack]

There are no problems finding gear, its just when resting on the gear. When it gets to below approximately 2500 revs the noise stops. I hope the gearbox is not on its way out as the car has only done 28k miles!!

[rjben]

The K series box is notoriously noisy. Mine wines and thrashes like hell on throttle lift off - especially in 4th and 5th. I was concerned at first but have been told that TADTS. Consider the fact that there is very little noise insulation between you and the box as well.

<touch wood> Also, I rag the hell out of mine on track and it's not broke yet </touch wood>