LSD.

[deltamal]

No not recreational! my Capri slipper diff was getting noisey and clunked when changing from overun to power, the same one that was used for a few years at the Pod - not done too badly, so Iv'e replaced it with a Blackline helical gear lsd, direct replacement and no problems changing it, seem's to be good so far but I need to do some long runs to bed it in, makes an easy fix for not too much money....🙂

[Johnny Boy]

I'm using a Blackline helical in my Cortina, it works great, no noises, you would not know it was in there.

I ran 500 miles, and changed the oil, as a running in precaution. 

[Gareth_C_79]

Im also using a blackline helical geared diff. I changed the oil after about 1000 miles. Had no problems with it at all. I find it fairly quiet and it does exactly what I wanted it to 😉