Thread: Strange 'clicking' sound when in reverse

Hey all, as the title suggests, I have a clicking sound coming from the front left when in reverse. It sounds to be proportional to speed and isn't that loud- at this stage! The noise started instantly i.e. not gradual.

I have a LT85 gearbox fitted to 4bd1t. Gearbox was rebuilt around 9 years ago. Excluding some whine in 4th and 5th the box has been working fine.

Any ideas as to what it may be?

Thanks

Cheers for the responses guys!

EDIT*To be honest I can't remember the exact km's at the time of the rebuild but ~220K km's wouldn't be far off.

So I did a little test during my Sunday drive...

I parked up. Put both the transfer case and gearbox into neutral- The result was no noise.

I then put the gearbox into reverse and kept the TC in neutral - The result was clunking sound that is proportional (in frequency and audio) to engine rpm.

I hope this doesn't spell the start of the end of my gearbox!!