Bosch cordless drill gearbox

 The drill was making horrible stripped gear sort of noises.

I took it apart, couldn't see any damage, put is back together and it's fine. I have a horrible feeling it may have just skipped out of hear and I hadn't noticed.

But, for the record, here's how it goes back together

Remove the chuck before starting to take it apart. Left hand thread for the locking screw, right hand thread for the chuck. Put it into lowest torque setting.

All the body screws are fairly obvious.

Resist the temptation to fiddle with the torque setting once it's apart, it can turn too far in either direction and cause trouble in reassembly. If you do turn it past hammer, push those two lugs down towards the motor end while turning it back:

And here's the order for reassembly

Make sure the ball bearings are correctly seated on the springs before fitting the clutch ring, and check the clutch ring can be pushed down evenly all round.

bly:

The housing does have an alignment lug but it is quite small, check carefully