Hi all, I have a C15 Li cordless drill that I purchased in 2012, its well used but never abused. its developed a fault with what seems to be the clutch kicking in every time its on the low speed setting and either drill or screw setting, what I cannot understand is that it has an electronic clutch, but the motor's going and the gearbox is ratcheting, previously if it could not cope with a load it stops and beeps, I've had the gearbox completely to bits and cannot see any worn or broken teeth or any signs of a problem. I've searched the internet and cannot find any info at all on this fault...has anyone had the same problem?