So, i fancied an LSD this month, my gearbox is knackered in the fiesta apparently pulling your friend all the way from southend on sea to south wales using only A roads has a negative effect, finally busting out an end of all revs and 5th gead wheelspin in the ice will cook your bearings on the end of the main shaft and around the diff,
i bought a gearbox off "cookie" and i got a limited slip diff of my mate (from an s2 escort turbo),
so i figured great, open the gearbox pull it appart, out with the slipp diff in with the limited slip diff
oh boy was i wrong,
so firstly removing the oil from the box easy, just pop out the remainders of any cv joints / drive shafts, rest the box on its side over a wall and catch dripping oil in a biscuit tub
couple hours later i stopped dripping, time to dismantle,
whip off the very outer cover, just a few not so tight bolts,
here you will find mr 5th gear and syncro
undo a torx screw here take off a springy selector thing there, bash out a circlip there minding not to blind you self
voila your just left with one last cog which seems to be very stubborn,
so a quick little trip down to halfords to grab a gear puller,
back home to the gearbox assemble the gear puller it has 8 different combinations, none of them fit,
time to make my own combination, (just use 2 legs) the gear-puller drops off, back to 3 legs flip one upside down great it fits, get the blow tourche out heat the cog up and hopefully it will just slip off,
wrong! the gear puller snaps game over for tongiht the gearbox wins,
the next day back to halfords with the receit hello this tool broke id like another,
back to the gearbox, again this tool doesnt fit, out comes the angle grinder 5 minutes later the tool fits, out with the blow touch again, and pop off comes 5th gear,
finally i can serperate the middle case to reveal the gears, and the standard diff,
a close inspection of the magnet reveals that this gearbox has had a few crunches as theres a couple of teeth stuck to it haha, i hope there not important
so now im thinking great out with the old diff in with the lsd,
i lift up all the gears and selector and manage to wiggle the standard diff out without upsetting any of the gear selectors and squeeze the lsd in, but it just doesn't seem to fit right (its a series 2 escort turbo lsd it has 8 bolts its been in a fiesta box before it should fit), its grinding on the case as i turn all the gears around,
out with all the gears and selectors a couple of circlips here and a tug there, the lsd diff is out compare it to the original diff and bugger the bearings are smaller on the lsd,
a quick call to newoods
"Newood Transmissions - Essex Gearbox repairs specialists
Automatic & Manual Gearboxes Exchanged, Reconditioned Units, Axle / Overdrive Specialists, Clutches Fitted, Differentials, Prestige Car Specialists. gearbox ...
http://www.newoodtransmissions.co.uk/ -"
confirms that there are 2 types of bearings big ones and small ones,
now he has the gearbox its his problem to make the diff fit
apparently you cant just take the bearings from one diff and fit them to another diff, you have to cut the old ones off and press the new ones on,
also you cant just do that, you also have to re-shim the diff so that it sits snug in the box otherwise "it will wobble around in there"
damnit i was hoping the strip the box fit the diff put it back together jack the car up take the old box off and have lsd fitted by this evening argh
TBC..........
but at least its given you some experience in stripping a gearbox, i'm not so sure i'd be that brave and jump right in 
.