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NISMO 370Z Differential Failing
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Nissan really need to improve one or two things for the 2010, don't you think?
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I seriously don't see the logic on putting a VLSD on any sports car. Specifically one that is likely going to see track use. Time to shove in a nice clutch type.
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sounds like nissans dirty little sercets are finally seeing some light
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Idiots.
Such a big campaign to sell them Zs and then these BAD news.. I guess this will be the same for the european "Nurburgring edition". |
At least they are making it known about the oil temp issue and the diff issue.....maybe nissan will give us the oil cooler if more articles are wrote about it
DAN |
i think eventualy they will be forced to admit it.
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It's not just the NISMO it's the 370z period. A few here already had it happen.
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It's becoming a bit rediculous now, especially promoting a TRACK-ORIENTED car without adequate cooling and now rear diff. Looks like to keep the costs down they really skimped out on a few key areas, at least for a sports-car.
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it's coming back to bite them Nissan ppl in the bum now.
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God, I hope I don't get burned on this car like I did when I purchased a brand new Sentra SE-R Spec-V back in 2002. That car was the worst car ever made by Nissan and a huge disappointment. Everytime I see one on the road (which isn't often since few are still running) I vomit. |
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I agree that the LSD should have been built a little stronger, though. 135i owners are finding out that their Brembo brake calipers crack severely (requiring complete replacement) under hard braking at the track. |
U guys hafta understand u r getting a lot of car 4 the money. If u r a enthusiast u will upgrade ur vehicle as necessary. The 370z is amazing. I am very satisfied and I will tune it 2 make it even bedda.
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My thoughts:
1) If you "under-engineer" a car to save money, you end up replacing a lot of parts on warranty, thereby paying for 2 or 3 of the original parts + labor for exchange, rather than a 20% premiun for an upgraded part from the begining that can tolerate the abuse. This gives a rationale to make the car durable in the first place. 2) As the end user, if you modify an under-engineered car and it breaks repeatedly, they say you broke it from abusing it, denying warranty and you have to pay for replacement parts repeatedly. 3) If you under-engineer a track oriented car and it breaks repeadedly, it gets a bad reputation and people stop buying it even after you fix the defective parts in upcoming model years because there are other cars on the market that are cheaper to purchase and maintain under race conditions. |
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I for one, am really going to track it. First oil temp issues and now differential issues? I GOTTA think Nissan is gonna make good on it in the not so distant future. Coincidentally, the OTHER car I was interested in was the 135i, which also has cooling issues, and now brake issues? Perhaps I'll stick with my rock solid GTI for awhile longer... |
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no car is perfect i mean take my evo for example, its a track oriented car and it,....uh.. it... humm.. well maybe there is a perfect car..
ooo just remembered the temp. knob for the a/c / heat breaks in the 03-04 models..:tup: |
exact same reason y i'm waiting a year to have some bugs fixed. I know i want this car but just not now. I regularly track my s for the last 3 years and all i do is oil changes, replace brake pads, tires. Bulletproof. Too bad this car can't hang with the crowd anymore.
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This should come as no surprise. The differential would fail without a cooler. Its all about airflow and diff location. The 350Z has this same problem as well. Look at the pre-production test cars we photographed and wrote up, they all had diff coolers.
The Nismo car doesn't really have a Nismo performance LSD, that is a Salisbury mechanical LSD. The Nismo 370Z has a viscous LSD, the same as the stock sports model. Also note that the R200 diff in the 370Z is very strong and has a long history as being a durable piece that is exceedingly strong that can hold 1000 hp under racing conditions in the IMSA GTO Z and various racing GT-R's and Z's though history. The issue is that in both the 370 and 350, there is no air circulation around the diff and it heats up. Generaly about 30 minutes of track time is about what it takes for the temp to start getting critical. GTA makes a diff cooler kit and we have all sorts of info and tips on the other site for what to do if you have a track driven car |
Note that the reason the newer cars are having issues is that they are quite a bit faster. The horsepower wars have put cars into a category where a lot of other parts need to be upgraded. In addition to brakes and driveline parts, the high cornering speeds and sticky tires will also no doubt impact wheel bearings, bushings, etc.
Remember, these cars are seriously fast - as fast as the supercars of the early '80s - and they are darn sure more reliable than a Countach or a Testarossa. And race cars - designed from the ground up for use on the track - are not "reliable" in any sense. Colin Chapman, perhaps the best race car designer ever, pushed the idea that if things weren't breaking, they were over-engineered. I'm not saying I want a car that breaks, I'm just saying that we have to understand some of the difficulty involved. People rail on Toyota and Honda for building boring cars, but they are the ones that really drove home the idea that a car would "just work". Now we're all used to it, and we're starting to take offense at the idea that a car will have problems, even when it is being used at 10/10ths at the track. A track environment is, by definition, severe. We need to accept that driving hot sh!t cars there will be costly. The Miata is reknowned because it has been, and continues to be, the cheapest possible way to get track time. But when you double the horsepower and only add a few thousand dollars, and you can't expect the car to be bulletproof. My $0.02 anyway... |
The R200 is a very strong diff, there is no way the VQ37VHR is going to stress it out. This diff has been used on very high powered race cars under actual racing conditions with good reliabilty. It can withstand the stress of a turboed VQ motor no problem. The issue is purely temperature related and is solved with an oil cooler.
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^^ Maybe true, but how come the 350z never had issues with their Diffs?
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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. |
Is the R200 refering to the ring gear or is this the same diff from the 280Z, etc?
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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. |
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 |
A different differential
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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... |
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.
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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. :thumbsdown:
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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 |
holy dead thread batman
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