Which Diff?

Timmer1978 · 10-02-2009, 12:19 AM

Z1, do you know if any of those diff's you mentioned do not require the side shaft set from Nissan to make it fit? I thought it was easier putting an aftermarket diff in with the non-sports package z's.

Quote:

Originally Posted by DDMotorsports

If you do not have the factory LSD then you will need the side shaft set from Nissan for the factory LSD to make it fit. ...."

travisjb · 10-02-2009, 12:46 AM

I'm selling my stock sport model LSD if you want to try that... $150 plus ship

TravisJB 370Z Race Car Part Out! Interior, Seats, Wheels and Tires, etc

Z1Performance · 10-02-2009, 09:37 AM

Quote:

Originally Posted by Timmer1978

Z1, do you know if any of those diff's you mentioned do not require the side shaft set from Nissan to make it fit? I thought it was easier putting an aftermarket diff in with the non-sports package z's.

I have not spent any time yet researching the varients of the 370z units - still learning

B1nks · 10-03-2009, 09:36 AM

So is it not safe to assume the 350 units are usable on the 370 ? I have been looking at OS Giken and Quaife but they don't have 370 options, only 350.

Z1Performance · 10-03-2009, 11:57 AM

the Cusco is the same, as for the others, I cannot say at this time

JoeD · 10-03-2009, 03:34 PM

Appreciate your input, Z1.

Any thoughts on the Kaaz unit?

import111 · 10-03-2009, 04:18 PM

Kaaz only makes 2 way diffs for the 350/370Z. If you are into drifting that would be good but not for road racing/HPDE type stuff.

travisjb · 10-03-2009, 04:30 PM

Quote:

Originally Posted by B1nks

So is it not safe to assume the 350 units are usable on the 370 ? I have been looking at OS Giken and Quaife but they don't have 370 options, only 350.

pretty sure my carbonetic is same model for 350/370... mike at ddm would know for certain

Valentino · 10-03-2009, 06:14 PM

OS Giken fits. just installed one. the shop test drove it and no issue. Need to change a shaft (370z SPK comes one long and the other short). Changed the long shaft with a short one, replace some bearing. Nismo diff cover also fits. I'll probably write something about what i installed in my car. After i get it, and test drive it.

Z1Performance · 10-03-2009, 07:05 PM

Quote:

Originally Posted by JoeD

Appreciate your input, Z1.

Any thoughts on the Kaaz unit?

they make nice stuff, but I'm not a drift guy, so it's not my choice. It's also quite loud/grabby.

Z1Performance · 10-03-2009, 07:22 PM

Quote:

Originally Posted by travisjb

pretty sure my carbonetic is same model for 350/370... mike at ddm would know for certain

yep carbonetics is too

I suspect the Quaife is as well, but I've learned not to take such things for granted....it will take someone willing to take a chance on it to verify

Valentino - good stuff, glad it worked out! I had spoken to OS the other day and they weren't 100%. Sounds like you had to do just what everyone else does when putting it into a stock VLSD equipped Z, so that makes it easy

For those interested, we have the OS's on the shelf

schrute · 10-05-2009, 09:57 PM

Good info - thanks for all the replies.

I'm leaning toward the Quaife but it would be nice to have confirmation that it will fit before ordering. Has anyone on the forum put this one in a Z34 yet?

Mergnthwirker · 10-07-2009, 06:41 PM

Quote:

Originally Posted by Z1Performance

to the OP

there is another thread that goes through the differences

The Carbonetics is a nice unit. Some (350Z's) have experienced issues with premature disk wearing, even using Carbonetics own fluid. I personally have never experienced it. The Carbon units they offer are not adjustable, so it does not allow for any customization now or down the road. That may or may not be an issue for you. They also require frequent fluid changes (every 3-5k miles) because the carbon dust from the disks contaminates the fluid. They are very smooth however and work well. You also are stuck using their fluid, so if you get it, stock up. We stock the diffs and the fluid BTW

Cusco - I've run one in my car since 2004 (I think...might be 2005!). It's a clutch type diff as well. It is adjustable from 1.5 to 2 way (2 way is for drift) and has 3 way adjustable lockup as well. With the right fluid, and the right setup (which IMHO is 60% lock, 1.5 way) it is nearly seemless. Mine makes zero noise. At a literal crawl at parking lot speeds you can slightly feel the inside wheel grabbing a touch...but you literally have to be crawling. At 5 mph, it's not present at all, for example. No special break in (no figure 8's needed!) and can use off the shelf fluid. Downside is there is a wait time for them (45-60 days at present). They are reasonably priced.

OS Giken - another clutch type diff, but has a bit of a different design. They are adjustable from OS Giken via diferent springs. Extremely careful tolerances means it is quiet and smooth. I've used them several times now on the 350Z's and they are unlike any clutch type LSD I've ever used. Higher cost vs the Cusco by a few bucks, but it's a drop in for base model cars on a 350Z (I'd have to check on the 370 base models).

Quiafe - top notch firm from the UK that has made diffs since forever. Theirs is a helical (gear) based unit. It is not adjustable at all, but it is literally so quiet and smooth, Nissan could have installed it from the factory and you would never thing it was aftermarket. A great street oriented unit. Works well for club type track days also, but not what I'd use on a full out race car.

Drexler - amazing unit but very spendy. Used by several high end OEM manufacturers, and many race teams worldwide

You can compare prices, specs, etc on our site if you like

Z-1 Performance Automotive Services Inc.

Given your conditions and needs/wants, I would select the OS Giken if this were my own car. My second choice would be Quaife.

This post is extremely helpful!! Plus +1 for you, sir!

travisjb · 10-07-2009, 06:56 PM

It is a great, informative post... but one thing i disagree with is that you have to run carbonetics gear oil on their diff. That is just a ploy to sell their overpriced gear oil. We're running motul of the same viscosity and works great. I've talked to a number of folks in the know that think this is fine.

Z1Performance · 10-08-2009, 05:17 PM

That may well be - but I know when we have asked them, as well as the former importer of them, both said that only a couple of fluids were deemed "ok" by the factory - one was their own, the other was by Neo and I don't think was even offered in the US. I even had asked about Motul, since we use it alot, and was told "we don't know". Doesn't mean other stuff can't be used, just what they told me. Their new fluid is reasonably priced ($50 for a gallon, I always have it on the shelf, as well as Motul and OS Giken's fluids) it's just the short change intervals with the carbon based diffs that stinks

10-02-2009, 12:46 AM	#17 (permalink)
travisjb A True Z Fanatic Join Date: Jan 2009 Location: GSO Posts: 2,803 Drives: VIR Rep Power: 188	I'm selling my stock sport model LSD if you want to try that... $150 plus ship TravisJB 370Z Race Car Part Out! Interior, Seats, Wheels and Tires, etc __________________ 2009 370Z #104 For Sale

10-05-2009, 09:57 PM	#27 (permalink)
schrute Track Member Join Date: Aug 2009 Location: utah Posts: 781 Drives: my z every day Rep Power: 17	Good info - thanks for all the replies. I'm leaning toward the Quaife but it would be nice to have confirmation that it will fit before ordering. Has anyone on the forum put this one in a Z34 yet? __________________ my journal \| 2009 370z touring \| 6mt \| platinum graphite \| my album second skin \| mr works \| fast intentions \| ssr \| eibach \| hotchkis \| spc \| toyo \| bluebatmobile \| v-led \| jwt \| ventureshield \| tinted tails

10-07-2009, 06:56 PM	#29 (permalink)
travisjb A True Z Fanatic Join Date: Jan 2009 Location: GSO Posts: 2,803 Drives: VIR Rep Power: 188	It is a great, informative post... but one thing i disagree with is that you have to run carbonetics gear oil on their diff. That is just a ploy to sell their overpriced gear oil. We're running motul of the same viscosity and works great. I've talked to a number of folks in the know that think this is fine. __________________ 2009 370Z #104 For Sale

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10-03-2009, 09:36 AM	#19 (permalink)
B1nks Track Member Join Date: Apr 2009 Location: Houston,Tx Posts: 721 Drives: 2009 370Z Base 6MT Rep Power: 507	So is it not safe to assume the 350 units are usable on the 370 ? I have been looking at OS Giken and Quaife but they don't have 370 options, only 350.

10-03-2009, 11:57 AM	#20 (permalink)
Z1Performance Base Member Join Date: Aug 2009 Location: St. James, NY Posts: 237 Drives: 350Z Rep Power: 16	the Cusco is the same, as for the others, I cannot say at this time

10-03-2009, 03:34 PM	#21 (permalink)
JoeD Banned Join Date: Aug 2009 Location: CA Posts: 495 Drives: Z Rep Power: 0	Appreciate your input, Z1. Any thoughts on the Kaaz unit?

10-03-2009, 04:18 PM	#22 (permalink)
import111 Track Member Join Date: Feb 2009 Location: Tucson, AZ. Posts: 622 Drives: 09 Nissan 370Z Rep Power: 191	Kaaz only makes 2 way diffs for the 350/370Z. If you are into drifting that would be good but not for road racing/HPDE type stuff.

10-03-2009, 06:14 PM	#24 (permalink)
Valentino Enthusiast Member Join Date: Jan 2009 Location: RaceTrack Posts: 349 Drives: SOLD 09,370z,M6 Rep Power: 305	OS Giken fits. just installed one. the shop test drove it and no issue. Need to change a shaft (370z SPK comes one long and the other short). Changed the long shaft with a short one, replace some bearing. Nismo diff cover also fits. I'll probably write something about what i installed in my car. After i get it, and test drive it.

10-08-2009, 05:17 PM	#30 (permalink)
Z1Performance Base Member Join Date: Aug 2009 Location: St. James, NY Posts: 237 Drives: 350Z Rep Power: 16	That may well be - but I know when we have asked them, as well as the former importer of them, both said that only a couple of fluids were deemed "ok" by the factory - one was their own, the other was by Neo and I don't think was even offered in the US. I even had asked about Motul, since we use it alot, and was told "we don't know". Doesn't mean other stuff can't be used, just what they told me. Their new fluid is reasonably priced ($50 for a gallon, I always have it on the shelf, as well as Motul and OS Giken's fluids) it's just the short change intervals with the carbon based diffs that stinks