The Definitive Differential Thread

[DEpointfive0]

Originally Posted by octet

Hi guys, nice informative thread!

I recently built my 7AT gearbox at Level 10 rated up to 1000bhp and the engine is on the way to Kyle @ IPP for a stage 2 build rated up to 850rwhp. I will also transplant the GReddy TT kit and supporting mods (injectors, fuel rails, fuel pump, oil coolers, oil pan etc) form current engine to the built one.

Now to be able to put all that power done nicely, perhaps I should do something about the diff, shouldn't I?

What do you guys recommend changing?

Thanks a lot!

You definitely want a diff, if you drive a lot, get a quaiffe. If you don't mind race car, get another diff. You MIGHT want to hear down your car too so that it'll be easier to actually USE the power you're making...

[14BlackCherry]

So just to verify this kit will work for upgrading rear lsd. I know I'll need a stub axle:
https://www.z1motorsports.com/rear-d...it-p-7528.html

Also there's a post talking about ring gear bolts are those necessary?

Thank you

[V1H]

Does anybody have some insight?

I've been reading much about getting a finned NISMO diff cover for my TT conversion. So I had a look under my UKDM 370Z GT Edition M/T.
It was built April 2013, hence MY12.

As you can see, mine has a finned stock diff housing.. How come? When was this introduced by Nissan.. and does it mean I can skip the Nismo diff cover mod? On google I cannot find any 370Z resembling my underside

[Presto]

Originally Posted by V1H

Does anybody have some insight?

I've been reading much about getting a finned NISMO diff cover for my TT conversion. So I had a look under my UKDM 370Z GT Edition M/T.
It was built April 2013, hence MY12.

As you can see, mine has a finned stock diff housing.. How come? When was this introduced by Nissan.. and does it mean I can skip the Nismo diff cover mod? On google I cannot find any 370Z resembling my underside

Different specs for different markets. The GCC (gulf cooperation council) spec cars also come with the he finned differential cover.

[octet]

Thanks!

Forgot to mention I'm on the 7AT sport model, so I my oem diff is the VLSD, isn't it?

What other bits do I need with the Quaiffe LSD?

I was looking on the Z1 page here:

http://www.z1motorsports.com/g37_370...oducts_id=2397

[DEpointfive0]

Originally Posted by octet

Thanks!

Forgot to mention I'm on the 7AT sport model, so I my oem diff is the VLSD, isn't it?

What other bits do I need with the Quaiffe LSD?

I was looking on the Z1 page here:

Quaife Differential

Yes it is. You need other crap I think... I don't know... I always thought Quaiffe made a separate model for the 7AT so you wouldn't need to buy new stub axles... But I'm not sure. The experts have gotta fill you in

[octet]

Must be this one then:

https://conceptzperformance.com/Cart...on.php?II=7066

[djmac]

http://www.trak-life.com/basic-intro...erentials-lsd/

Found this helpful as I didn't really know what the difference means..

[ConeKilla]

You should add WaveTrac as a diff option to this thread. $1295

[Taylortoons]

Looking to do this mod in January. I have a base AT with an open diff. When I contacted Z1, they mentioned that I have to switch the pumpkin to a manual to get the Quaife to work with 4.08 gears. What have other folks done with their 7ATs to go from base open to Quaife plus gears?

[Taylortoons]

OK. Update. I just bought a VLSD pumpkin from an 09 manual on Ebay. Fortunately, the parts company is here in Dallas. They didn't have the shafts available. Will have to get them separately. May have it rebuilt with 4.08s or just go with the factory 3.69.

[Felix 808]

Originally Posted by Taylortoons

OK. Update. I just bought a VLSD pumpkin from an 09 manual on Ebay. Fortunately, the parts company is here in Dallas. They didn't have the shafts available. Will have to get them separately. May have it rebuilt with 4.08s or just go with the factory 3.69.

I think I know the one you got, boy pricey , but it is a mod that is worth it. Enjoy

If you need a little help deciding on what gears would better suit you, send me a pm, I have something that might help

[Taylortoons]

I will pick up the diff this afternoon. The online pics of the car look like a manual base. If so, it may be an open diff. I noted the part numbers on another thread regarding the open and VLSD. I believe the open is 38301-EG53D and the VLSD is 38301-EH52D.

Will send a pm for parts. Will probably go ahead and rebuild it before install. I could also put it on a pallet and ship it freight to someone who can rebuild it for me.

[Felix 808]

Originally Posted by Taylortoons

Will probably go ahead and rebuild it before install.

That's the only way it should be done. Spend the money & set it up will everything you want in it & install it once. do it right, not again. It also gives you time to budget out your build as well as you can take your time getting it right then install it when it's complete.

[nissanNOOB]

Is this something that is mostly recommended for people with the stock open diff? Is it worth upgrading from the stock vlsd if you don't track your car?