gearbox noisy

[Andy41]

Hi all,  driving on the M1 yesterday we suddenly had a load noise coming from the transmission then a 'pinging' sound. I pulled over and could smell gearbox oil!! Only a small amount had driped from the transmission brake?? Anyway got recovered by RAC now need to find out problem anyone with any ideas please??

[Range Rover Blues]

If it's coming out of the brake then perhaps the back end/output from the gearbox has failed.  Pinging noise I don't know but something could have started to catch as it was spinning.

Start by taing the rear prop and drum brake off to have a look inside for signs of damage (remember the handbrake won't work when you do this).