Quaife LSD question

conmam

I would like to clarify this Quaife LSD confusion for everyone because I do have a situation to share. First, there are 3 Quaife models as everyone already knew ( 350Z and 370Z the same ):

1) QDF10L : For model with automatic transmission
2) QDF11L : Manual transmission with factory open diff.
3) QDF13L : For model with factory OEM VLSD

Well , I have 6 speed MT with VLSD so I had to choose QDF13L. Someone has indicated that it is a direct drop in with no need for modified stub shaft. That is not entirely true.

My QDF13L arrived yesterday and I have it sitting in front of me now. I personally called Quaife USA and Quaife UK last night and they both indicated that the Right hand side stub shaft must be professionally cut off exactly 1.700 inches. Without cutting this RHS shaft as specified, there is NO WAY to fit it in the Quaife. The left hand side shaft is perfectly fine.

So I really don't understand how Z1 motorsports classified the way they sell their Quaife diffs. It is rather confusing. When I called them and refer to the Quaife part number, they don't even know.....

One thing I can guarantee : On the OEM VLSD, the right shaft must be longer than the left one for a simple reason : The viscous clutch unit is installed more toward the left so the right shaft has a longer way to reach the its splines. It makes no sense for Quaife to spend big bucks in order to redesign and manufacture the internal chamber just to accommodate for the extra length. So, they'd rather have us installers to cut off this extra length ourselves. Makes sense to me from a business point of view.....

The other option, which costs more, is to buy a RHS short stub shaft from an OEM open diff , which is about $160.00 shipped.

So I am here to assure all of you that the QDF13L is the correct part for the factory OEM VLSD. Everything should fit properly with factory Nissan specs. The only thing you must do is to shorten the right shaft length as described above.