I'm giving my 210mm LSD a tidy up (removing 30 years of gunk off the outside) before installing it into my e28. In doing so I'm replacing the seals. What're people's thoughts on genuine BMW vs, OEM, name brand (e.g. Victor Reinz) or popping down to my local bearing/seal shop?
My understanding is, is that they're just a relatively normal seal and I just need to match the ID and OD and mostly match the thickness (currently running a 10mm instead of 9mm input seal).
Output shaft, 76X50X10, 33107510289
Input shaft, 50x80x9, 33121213949
And of course a new locking ring 33121205138. Anything else I'm missing?