I have a brand-new, unused Quaife QDF13L that I bought by mistake. The QDF13L is intended for a manual transmission Z with a factory viscous LSD. (If you have a base manual Z, you will have to buy a right hand stub axle from a viscous diff to use this part.) My car is an automatic. I was confused by the three part numbers, one being described only as "viscous". See my post here explaining what I later learned about the part numbers. Anyway, I had bearings pressed onto it and had installed the ring gear before I discovered it would not fit with the automatic's pinion gear. I have since removed the bearings and ring gear, so it's like new. The only other parts you will need to do a basic swap, is two side bearings and ten new ring gear bolts, the bolts are not supposed to be re-used. You could re-use the bearings off your old diff if you can remove them, and you don't have too many miles on them.

I need to buy a QDF10L, so this one needs to go. TH Motorsports will not let me return it because I no longer have the original box, and I attempted to install it, which is against their return policy. I'm asking $800 or best offer, or a trade for a new QDF10L. It cost me $1,155 from TH Motorsports, when I bought it about two weeks ago. PM or email me if you are interested. It is also http://www.ebay.com/itm/201535248875?item=201535248875.

 

Pmd

 

Sold to eBay buyer.