This question has been asked many times but nobody seems to want to answer it
I assume therefore that what you get back once it's repaired is no better than the original.
Unless someone wants to correct me?
Been researching this box for a while now as mine is quite notchy.
It is a German gearbox from a company called Getrag.
It is very compact and tends to wear its bearings mainly on its 6th gear shaft due to excess heat, mainly a diesel car problem due to low down torque.
An uprated bearing is available and can be fitted without removing the box.
Adding extra oil ie 3ltrs in total can help and not using 6th gear for too long on the motorway also helps prolong the bearings life.
Some M32 boxes are used in motor racing and to prevent failure they have added an oil cooler.
I put 3ltr MT90 in mine and the change is improved especially in 3rd but still not perfect.
I am booked in to have the bearings inspected as a preventative maintenance measure as I have read the bearing cage can break and spew metal parts into gears costing anywhere from £700 upwards to repair.
I was quoted £300 to replace 3 main bearings by my local mechanic/ friend, if it is required.
Update: Had full rebuild by auto transmission specialists due to shims being incorrect from new.
all bearings replaced and new correct shimming to prevent the bearing spinning in its casing.
Cost £1160 but car was a bargain so still very happy.