NISMO 370Z Differential Failing

smartbomb · 07-02-2009, 11:50 AM

Quote:

Originally Posted by FricFrac

Is the R200 refering to the ring gear or is this the same diff from the 280Z, etc?

It is almost the same R200 as in the 280, the nose of the 240SX, 300ZX, 350Z and 370Z is referred to as the short nose R200 as in the pinion area is shorter. The older R200's are called the long nose version. The 300ZXTT and Q45 use the oddball R230 diff.

NIZMOZ · 07-03-2009, 07:16 AM

Quote:

Originally Posted by smartbomb

If you read my posts in this thread and places like my350Z you would know that the 350Z and 370Z have identical problems with heat build up.

350Z's in real racing conditions will start to fail their diffs at around the 30 minute mark. SCCA T2 Z's have to install dif coolers or the diffs will fail by locking up. A T2 car is like a street car full modded with bolt ons.

I have a bunch of experience with racing and tracking the 350 and carefully monitoring diff temp. If you are on the track for more than 30 minutes at a time, something will eventually happen in a 350 or 370. With a cooler you will be fine, even with a mechanical LSD, sticky tires and turbos.

I have been part of the other 350z site since early 2004 and no one had these problems with heat build up or diffs failing. I race my car in 100+ degree heat here and it doesn't have a issue period.

smartbomb · 07-03-2009, 12:08 PM

Quote:

Originally Posted by NIZMOZ

I have been part of the other 350z site since early 2004 and no one had these problems with heat build up or diffs failing. I race my car in 100+ degree heat here and it doesn't have a issue period.

If no one in the 350Z world really experiences diff failure then either, their hot lap sessions are shorter than 30 minutes and/or they are slow or running an open diff or they are street racing.

All SCCA T2 350Z's have to run diff coolers and they are about the equivalent of a bolt on modded street car power wise with well developed suspension. Same thing with Grand Am Cup 350's which are lightly modded and run on DOT tires as well.

Many street 350Z's driven by good drivers have had their diff's fail when the session was longer than 30 minutes, usually by bearing failure and the diff locking up. In the 350Z racing community, it is common knowledge that you have to run a diff cooler.

In testing I have cataloged diff temps and we usually have to stop right past 30 minutes of track time as the diff temp is starting to go above 300 degrees. The M-Workz 350Z didn't have a diff cooler but we had to run partial sessions in it until we installed one.

There is plenty of empirical evidence proving the 350Z diff fails due to overheating. The thing about forms is the signal to noise ratios are really poor unless some of the smarter guys are active. In most mature forums, they tend not to be.

Getting into arguments like this one discourages people who really know what they are talking about from contributing.

need4speed · 07-03-2009, 10:43 PM

Ginga bread man has a point. But I still think the oil temp issue is nissans responsibility.
But on the diff. It fuctions well on the street in sporty driving styles.
If u gonna track it? Get the quaife lsd. true track guys void the warranty in the 1st week. Lol

L33T Z34 · 07-12-2011, 06:52 PM

Do the '11 Zs have a finned bottom R200V? If not, maybe the 2012s will. I know my '09 had a flat bottom R200V (38301-EH53D), but when I ordered a new diff I got 38301-EH52D which has the finned bottom and jack peg.
I'm just curious when Nissan started to install this from the factory...

fuct · 07-18-2011, 02:17 PM

non of the nismo's year wise have a finned bottom diff cover. but you can order one online and install it yourself. what i will do when i change out my dif fluids.

L33T Z34 · 03-19-2012, 11:53 PM

My coworker went to the Chicago autoshow this past FEB. He took pictures of the rear diff in the 2013 model. The '13s apparently still get the old flat bottom R200.

DEpointfive0 · 03-03-2013, 05:07 PM

Quote:

Originally Posted by L33T Z34

Do the '11 Zs have a finned bottom R200V? If not, maybe the 2012s will. I know my '09 had a flat bottom R200V (38301-EH53D), but when I ordered a new diff I got 38301-EH52D which has the finned bottom and jack peg.
I'm just curious when Nissan started to install this from the factory...

Quote:

Originally Posted by fuct

non of the nismo's year wise have a finned bottom diff cover. but you can order one online and install it yourself. what i will do when i change out my dif fluids.

None of them had/have it, but this one is especially sexxxy because it has fins ON the diff itself, AND a jack point too!!!

Btw, fuct... I was going to put a finned cover on, but you have to drop the diff... That killed it for me... If I'm going through that... I'd rather install a custom cooler from the bottom drain valve to the top filling port

TerribleONE · 03-03-2013, 05:17 PM

holy dead thread batman

DEpointfive0 · 03-03-2013, 05:22 PM

Quote:

Originally Posted by TerribleONE

holy dead thread batman

Wow... I didn't even notice the dates... I don't search for threads usually... I click "New Posts", and that's what came up... LOL

03-19-2012, 11:53 PM	#37 (permalink)
L33T Z34 Banned Join Date: Jun 2010 Location: Ahnald, MO Age: 46 Posts: 387 Drives: 09 K51 G C Bw/S 6MT Rep Power: 0	My coworker went to the Chicago autoshow this past FEB. He took pictures of the rear diff in the 2013 model. The '13s apparently still get the old flat bottom R200. DEpointfive0 likes this.

03-03-2013, 05:17 PM	#39 (permalink)
TerribleONE A True Z Fanatic Join Date: Jan 2009 Location: Socal Posts: 10,203 Drives: WOT Rep Power: 5850	holy dead thread batman __________________ 638WHP 541WTQ @ 13.5PSI Build thread

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07-03-2009, 10:43 PM	#34 (permalink)
need4speed Base Member Join Date: Jun 2009 Location: tx Posts: 199 Drives: 08 altima 3.5se Rep Power: 15	Ginga bread man has a point. But I still think the oil temp issue is nissans responsibility. But on the diff. It fuctions well on the street in sporty driving styles. If u gonna track it? Get the quaife lsd. true track guys void the warranty in the 1st week. Lol

07-18-2011, 02:17 PM	#36 (permalink)
fuct A True Z Fanatic Join Date: May 2009 Location: Sugar Land Posts: 3,692 Drives: 97' Ranger :) Rep Power: 23	non of the nismo's year wise have a finned bottom diff cover. but you can order one online and install it yourself. what i will do when i change out my dif fluids.