yeah, well...there is a cheap way to just "fix up" a gearbox so it works ok,,,& that is to just rip it apart, fit whatever it "NEEDS" & whack it all back together again, basically maybe a couple of syncro rings, a ley shaft & a couple of bearings & job`s done,,,but that is no way a recond box.
To fully reo a gearbox it takes a whole heap of parts & it`d be well more than $400 in parts
take (for example) a genuine leyshaft (not a cheapo non gen one) at about $100 , then 3 leyshaft bearings (approx $60) , then a double row & a single row mainshaft bearings, (chunks $$$ there like maybe $160),,, then 4 x syncro rings at over $50 each now, ($200),,,then maybe a 2nd gear (probly $100 ---2nd hand if you`re lucky) ,,,then a full gasket & seal kit ($40 ish) ,,,then the diff ($ ??? could take a few hubndred to fix up) ,,,then the outrigger bearing $50-ish & drop gears -idler bearings etc.
So there you have possibly well over $1000 just in bits & pieces,,,not counting labour charges.
some people just don`t realise that the gearbox is just that ,,,a gearbox,,,but we have a differential & a set of 3 drop gears too,,,then you have possible "CASE" problems,,,lets say you have a broken diff housing or a stuffed up primnary case???
Yeah???????
well,,, a $400 box rebuild is just not enough now is it?????????
prices above are just guestimates,,,as i know some people score cheap parts here & there, but you get the picture i hope,,,
now add into that the guy doing the labour,,,how many years has he been building "Mini" gearboxes???????? ask yourselves that now too then????????????
Yeah???????????
well there you go...who wants a cheapo gearbox build job now then????????
I`d rather have the job done right , fit it all in my mini & drive it for another 20 years before it needs another re-build, but that`s just me tho

,,,all that oil from the gearbox taking any ground up metal particles with it right into your oil pump, slicing through your oil filter & straight into your centre main bearing in the crank shaft in the engine,,,yeah!!! Yummy tell your mummy
sorry, but it really gets on my nerve as to how so many people say that it`s a quick easy cheap job , but are happy enough to leave out the important info about all that surrounds these wonderfull little gearboxes. There`s way more to it than just a gearbox.