I have a 2013 G37S sedan with about 33,000 miles. To give you an idea of current grip- I run the Z1 400hp pckg, Tein basis coilovers, Hotchkis sways and 245/275 19" RE-71R tires in the summer.

I have not noticed any real issues with grip with the factory viscous LSD, but definitely with heat. About a year and a half ago at Road America (4 mile track with long straights and high speeds) the rear diff got so hot that it melted the rear abs sensors and I lost my abs brakes. I have since upgraded to a Z1 rear diff cover with cooling fins and more capacity, Redline diff oil and I also plan to wrap the exhaust going around the rear diff in heat wrap for track days.

I am going to be upgrading to 4.083 gears in the rear diff soon and I was thinking of maybe upgrading the LSD as well while I have the diff open. This car is mainly a street car, but it will see a handful of track days. I am just trying to figure out if it is worth it since it more than doubles the cost of an already expensive upgrade.

I talked to Jon and Joel at Z1 and Jon and Spencer recommend the OS Giken and Joel recommended the Quaife.

Let me know if you have an aftermarket LSD, what you think, if you have driven a car with one, install, maintenance, recommendations, thoughts, etc.

Thanks!

 

To quote Tom Petty, "oh, hell yes".

 

Could you be a bit more specific...

 

I talked to Spencer at Z1 for quite a while about a new LSD. He recommended OS Giken or Wavetrac. He thought the Quaife would not be too good in the snow.

I am probably leaning toward Wavetrac if I do it because there is less maintenance, oil is cheaper, it comes with a lifetime warranty, and it is not adjustable so I don't have to worry about my installer putting it on the wrong setting. I am still trying to talk myself into it as I don't really recall any issues with the stock LSD.

Has anyone tried OS Giken or Wavetrac?

 

I haven't tried either, but have you considered Z1 to build it for you if you're concerned about your installer making a mistake?

https://www.z1motorsports.com/transm...l-p-11644.html

Their price does seem a bit high but maybe not

 

Check on my370z for info on limited slips. The guys who track their cars regularly tend to replace stock stuff and they've most likely already thried the diffs of which you ask.

 

I'll check that out. Do you have any experience with LSD's? You sounded like you were pretty convinced of their viability in your 1st post.

I was hoping someone with a G would have a bit of experience with this. I feel like I am already the guinea pig for my Sparco seat and trying to get rid of this airbag light is maddening.

 

Heard lots of great things about OS Giken lsd in the diffs from 370 guys with normal drivability and track use. I will be going that route soon when my cars back up