Originally Posted by
Mike41288
You can get a helical from Quaife but you need shafts from an open S13 diff to fit it as they only offer it for 29 spline shafts. This is partly my fault as I gave them my early s14 diff to fit the helical for me, but I'm pretty sure the unit was designed for 30 spline shafts. Instead if telling me the shafts wouldn't work, they shortened the original shafts and made a new bit where the splines fit for 29 spline. The awkward thing was I had 30 spline s15 helical shafts to put in it. Think they only charged me £100+ vat too.
The actual diff is cracking though. With a nismo s tune alignment and ultra high performance tires, I've got all the dry grip I could ask for and a lovely helical whine due to it being solid mounted
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