replied to your pm there man!!
What's so special about a s15 helical diff??
shim up a vlsd? cheap and improves lock up. iv a VLSD and it locks up everytime,
have one here lad in galway and all, has output shafts not cased. perfect condition when removed. pm me an offer shur ?! cheers
also have 1 in a case im in wicklow give me a txt 0872572673