147 keeps losing 4th gear
I keep losing 4th gear! Stick won't go into 4th but all other gears are fine!
It did it a few weeks ago for about half an hour, but it's been fine since, but this afternoon it suddenly did it again. Extremely annoying driving it without 4th...
I'm told that it's swarf that gets stuck in the selector fork for 4th, I've looked on the forum and found a fix, but the link I keep finding is quite vague. It doesn't mention how the bits of swarf drop out of the selector linkage, do I expect to just see the bits of metal in the bottom of the gearbox casing or do I have to poke around to dislodge it from the selector?
I'll be doing this on my drive with axle stands, so how much time should I allow to do it?
Also is there an actual gasket required for the end cover or is instant gasket enough? How much gearbox oil would I expect to lose and what type of oil should I top up with? Also where's the gearbox oil filler?