My panda is of the road my inner cv joint (tripod) failed and has deposited lots of metal shrapnel in to my diff and gearbox. The gear box was a bit clunky before this happened. I might drive the car and see what happens. Or try to Flush the gear box out with kerosene. I suspect that there is a magnet in there to collect metallic debris. If i were to take the gear box apart to clean it out i may as well replace any worn parts, dose any one have any experience of this? Where would i look for replacement parts? I have a 2wd box some parts might be interchangeable but not sure which. I think the ratios are different but maybe thats just in the diff. I know profesional gearbox rebuilds are discussed in another thread. but i am thinking of doing this myself.