Posting this here since it's mostly us FI guys that would be doing this

I have had a 3.3 FD ring and pinion for a few years waiting to drop it in.
I have someone interested in buying my pumpkin with the Cusco RS LSD
so I can finally get a LSD that will support the 3.3 ring and pinion.

I been trying to do my research and found a few threads from back in 2007
saying the only available LSD's for the 3.3 FD were Quaife with modifications/Carbonetics and Cusco RS. I also read that the diff housing for the 3.3 auto was much smaller than the 6MT diff housing. I was looking at the OS Giken LSD on the Injected website and found this "Notes: MT only, non-LSD housing. Contact us for information on installation in factory-LSD equipped housings" and I'm also finding this https://my350z.com/forum/370z-engine...giken-lsd.html.

Can anyone add anything to the notation that is posted on the Injected site?

http://www.osgiken.net/products/sideFlangeAdpList.pdf

Is there truly a OS Giken LSD for 3.3FD or am I still limited to the 3 selections I keep finding on this site?

 

if OS has a lsd for automatic cars, then thats the one that works with the 3.3, i think....

Pretty sure thats how you have to order the Quaife, for an automatic

 

The Auto Os LSD I linked to in this forum I didn't notice it was posted under the 370Z forum until after i posted it so I don't know if it would work for us.

I also found a few threads about axle modification for the C Clips when using the Giken

https://my350z.com/forum/engine-and-...ull-out-2.html

I'm still confused about the housing issues that Injected noted since I see no mention of that on the Os Giken site

Another question if my only option are the 3 then I will probably go with the RS again but will the 3.3 FD have a problem in a VLSD 3.5 diff housing?

 

a little of topic, but does the 3.3 directly fit into the oem 3.5 vlsd? if I was going to just swap the 3.3 gear into my 3.5 vlsd

 

Nope the 3.3 FD ring is much thicker than the 3.5 ring

That's why there are different LSD for 3.3 and 3.5 FD

 

so how does one go by getting a 3.3 gear to work? get a full auto pumpkin with vlsd ???

 

Yes, trade an auto guy with bolt ons it will be a nice upgrade for him as well.

I have the Quaife 3.3 it is a great LSD for street driving.

 

i would gladly trade my 3.3 for a 3.5 lol

 

Same here and I agree

 

You're making it way harder than it needs to be

The Automatic cars use their own differential, there is no such thing as a differential that fits both auto and manual cars.

the 3 aftermarket LSD choices for an automatic are:

OS Giken
Cusco
Quaife

The pumpkin housings are the same, the internals (diffs/ring gear/pinion gear) and possibly output shafts (depending on original spec of vehicle) are what are different

 

Hey Adam you should know since I sold you the Diff housing that I got the parts from and I always tend to over analyze a situation just to make sure I dot all the I's and cross my T's.

So what is the proper OS Giken part number for the 3.3 FD?
I'm not seeing it on their site or anyone else's for that part

 

I have an auto 3.3 with LSD if anyone with 3.5 LSD wanna do the full pumkin swap