Spruce has pretty much said it in a nutshell , years ago i worked in an engine recon centre , they hit the wall as it was no longer viable to repair properly with new parts .
Then i was a fitter for a transmission company , still keep in touch with them now , they are facing the same end due to todays throw away society , when i worked there it got boring at times , we only saw the same jobs day after day manual boxes were renault clio , 19 , megane, all same boxes .
Ford tranny smiley face MT75 box , also bad diffs !
Autos was BMW , Vauxhall , Renault , same boxes , same fault , £9 part came out as a £1600 bill ,
They dont even get work from the main dealers anymore , if warranty its new box and fitted in house ,if non warranty then it ends up as a huge bill for the owner , or in the back street garage willing to give it a go for half the money .
Rich