Jump to content
SAU Community

Recommended Posts

Link http://www.nagtroc.org/forums/index.php?sh...=25361&st=0

A couple of things. Is the transmission made by the crowd who made them for the Veyron? Disconnecting the traction control voids the transmission warranty? A bit rough and perhaps unsustainable if there is a manufacturing fault or the transmission is not fit for its intended purpose?

Link to comment
https://www.sau.com.au/forums/topic/239115-us-transmission-failures/
Share on other sites

  • Replies 88
  • Created
  • Last Reply

Top Posters In This Topic

Well, the box definately has some form of torque limiting feature built into it's smarts, because all the vehicles that have had Cobb tuners etc installed, show an extra 50 to 100kw on the dyno, but run 11.2's and 11.3's just like a stock one. The gearbox is both the best and worst feature of the vehicle imo.

Love the way it works, but I can't help thinking it may hamper really big hp applications. Of course, the shift protocols wouild also require remapping if and when they get around the torque limiting, and then there's the question whether those clutches and/or internals can handle more grunt?

Interesting times coming I reckon......

My impression is that there is some serious transmission abuse going on, which with any car will eventually lead to a failure. It seems that there are a number of other make owners in the US who are seriously pissed that the R35 has received so much attention and they are doing their best to discredit the car that is taking attention away from their cars.

The various targa R35's in AU must be giving the transmission a serious workout, no failures yet are there? Good test for a transmission I'd guess.

No, plenty of geartrain noise in first gear, but it's always been in the car. We decided against using LC during the event though, as we wanted stabilty control on and you cannot have both, and the car gets away very nicely anyway.

Over a 25 klm stage the transmission oil temp didn't creep over 115 degrees that I saw, and it was just awesome all the time. No failures as yet (hopefully never!) in the geartrain, even though the car left the ground at times without any throttle lift in 2nd, 3rd, 5th and 6th.....

I'd like to know what gear that is thats stripped in that link, I'm not familiar with the 'box to know just by looking. Any ideas?

Edited by Marlin

the thing is, doing these launch-controlled starts is so much harder on the transmission than any race track driving will expose it to (super high oil temps not withstanding).

just think about the physics here- it's a 1740kg car, with wiiiiide&grippy tyres (140 treadwear rating from the factory), a super-fast response AWD system that almost instantly goes to 50:50 torque split, and an engine that makes at least 580Nm of torque at launch revs. doesn't take a real braniac to see where this is heading...

i think the problem is thus: thinking back to high-school engineering science, metals have whats called 'plastic' and 'elastic' strain limits. the 'elastic' limit is how har it can deform and return to the original shape (think of flexing a metal ruler gently), whereas the 'plastic' limit is how far the object can be deformed before it fails catastrophically; though it won't return to the original shape after the 'elastic' limit threshold is exceeded (again, think bending a ruler until a permanent crease forms)

what i think is happening with these R35's that have had gearbox failures, is that the owners that spend all day smoking everyones arse off at the traffic-light GP are taking certain teeth on the 1st gear gogs up to and past the elastic limit with every launch. eventually most, if not all, the teeth on 1st become deformed past the elastic limit, and the next time the car is launched with the cogs in the fatally weakend spot, it just lets go.

that's my theory anyway- if it wasn't the case, it'd just die the very first time you tried it.

and looking at the shots of the busted box, they really aren't small gear faces, either...

from reading the guy lost 1-3-5, so you'd assume it's 1. But maybee even the R35 has a week 3rd.

1st

the tranny obviously has a built in function where it doesn't try and select certain clutch groups if there is a drive irregularity detected

Suddenly the claims of porsche having trouble getting out of third with the gtr has merit. If u paid this much money for a car then u should be able to drive it like u stole it when u want to.They obviously made it with the weak gearbox. Nissan need to Fix the problem and look after u r clientel b 4 they send the GTR name into the toilet.

Supercar my ass!!!!!!I have become a fan of skylines in the last year or so but reading this is garbage.

As a supercar it should be able to take a licking and keep on ticking. I would be loading up with ammo and going to my dealership if they gave me this answer.

Hopefully they have the problem fixed b 4 u aussies get a hold of one. They should have disabled the ability of the LC from factory if it would void the warranty. its like getting the atomic bomb but being told that u have voided the warranty after u pressed the redbutton. BS to the max.

there american fat C#*ts remeber, 1750km car + 200kg driver + 80kg fuel+ 20kg of Maccas in the passenger seat + launch control trying to race to the hospital after realising a stroke is comming on...... super car or not ALL cars have a fault somewhere.

mabey the tranny needs to be alitle stronger but we will see what happens....

also the quote above that says in a nut shell that supercars should take a hiding and keep on going is completely shit..... yes supercars are expensive but none of them are reliable. They produce that much power that many things can and do go wrong. How many supercars do you see driving around in a month???? almost none, how many people see late model ferraries and porsches on the side of the road or on the back of a towy???? allot more than you see them driving i can assure you that....

a super car is meant to be thrashed but abuse will kill it.... and yes the launch control is the most damaging feature on this car and i rememebr reading 10 launch controlls can f**k it up completely, no one in a conventional gearbox and clutch can launch like these things do time and time agian, hell normal gearboxes can snap in minutes of heavy driving and there is nowhere near asmuch force as there is in the gtr.... still at the gtr's price range nissan should take this very serious and rectify any faults there may be.....

i remebr watching a documentary on the guy that is ferrari's official car tester in italy...... he went through a rari gear box in less than 60 seconds before the car wouldnt move forward at all, he had to take it back to the pits in reverse, the only difference with the rari and a gtr is people who buy the italian red machine are buying it in general for show of status, not for thrashing......

people buy the gtr for thrashing and performance, not really for status and looks

found the link i was talking about http://www.youtube.com/watch?v=Ux1KLSo-Mcc...feature=related

that's nothing to do with the gearbox

i think you'll find one of the a/c lines or gas canister let go

That'd suck. All I know is that this seems like it may be a manufacturing fault. What's the point of building a car with L/C if the tranny can't cope with it? Either don't include the launch control or strengthen the tranny.

It could simply be that the first batch of cars have a problem that has yet to be rectified.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • So, I started this repair and got as far as "fixing" the holes with some fibreglass. God all those years working on boats came back quickly. I decided I'd reach out to some rust guys just to see what they would say about it. I came across a guy about 40 mins away and went to see him. He said the windscreen needs to come out, that there might be some more bits around the windscreen and he'd quote them at the time. But his quote was $300 to remove and replace windscreen and $3k for the damage he can see. He said he could respray the roof for $1200 and the bonnet for another $800 (somebody has previously rattle canned it, its horrendous). This is $5300 + any small additional bits. It's a lot, I get that and the name of one of my fave youtube channels 'Not Economically Viable' comes to mind.  I'm not being financially rational, but I've taken him up on the quote. He's opening a new shop in November with more room, so we're waiting for that. I'll leave the currently missing headliner out until then. I'm looking forward to it being fixed and having the paint looking nice again (lots of clear coat issues on the roof too). / flame suit on.
    • Oh and some up-and-comings; New rear drivers wheel bearing. I'll do that this weekend while the diff is out. The car is already up and the d/c axles and missing exhaust will help with space. This is the last bearing for me to do and I've been dragging my feet on it. I also have some new EBC blue stuff pads for the car and some new brake fluid. I haven't ever flushed the fluid in this car and looking forward to it. I have 600 degree fluid to put in. Not exactly "race fluid" but better than the typical stuff I have been using.
    • A proper clutch/plate type mechanical diff with quite a lot of pre-load and high locking % is better for drifting. Much more consistent in its behaviour. A helical can be annoyingly vague and inconsistent in how it responds under the sorts of abuse found in drifting.
    • Some updates here. I pulled the entire interior out, minus some trim to respray the seats with Colourlock dye. It turned out really nice though I accidentally let the dog in the car after and she scratched up the front seat.  This is what it looked like before, the colour was just washing out everywhere but thankfully the leather was in good nic. Then after the respray   And after the bloody dog jumped in The headliner is out waiting to be retrimmed, but it will stay out now until Nov - see why below. I replaced the stereo/headunit with a period-styled Android headunit. I have no after pics, but I'll get some. This is because of the missing pixels. I tried to fix this twice with replacement ribbon cables but couldn't. Also the bluetooth interface I'd bought for this was crap. Then there's the rusty roof. Pics and info in this other thread. I have decided to get this repaired professionally, but I'll update that thread. This is why the headliner will stay out for now. I'll be getting the roof and bonnet resprayed at the same time the rust is fixed. I also had an interesting issue with my drivers door lock.  For a small period I was having issues getting any 12v power to the car - I mean *any*. It would have no dash lights, nothing. It happened while I was at the shops and I couldn't get in the car. So, we had 2 problems. The most pressing here is that I was locked out. I have only a single physical key hole on the car, the drivers door and no amount of turning would unlock the car. Surely it doesn't need power for this? The second issue is why am I losing all power periodically, The battery isn't dead, its almost like the battery isn't even there. Two issues that were surprisingly easy to fix. You fellow BMW over-engineering lovers will appreciate this. The lock in the door has 5 states; mechanical lock, electric lock, neutral, electric unlock, mechanical unlock achieved at -90 degrees, -45 degrees, 0 degrees, 45 degrees and 90 degrees. Although, the unlock is towards the front of the car, so opposite for LHD countries. Sticking the key in and turning 45 left or right is what is used 99% of the time. It activates the central locking etc. 90 degrees is for dead battery access and, obvs, only un/locks the one door. But because the mechanical lock is never used and is 27 years old, it seizes up. I was totally unable to turn the key far enough to get to the mechanical unlock (At the time of locking myself out, I didn't even know this was a thing). I eventually did it with some vicegrips and teflon spray.  I made a quick vid for other E39 peeps.   The battery issue is totally new to me also - It wasn't making sufficient contact between the post and the terminal. The terminal was bolted on tight, but the car wouldn't have power. After checking the battery with my multimeter I accidentally contacted the terminal and the battery post and the car got power. The battery was only a few years old and in good condition. I cleaned the post and the terminal with a wire brush, bolted it back on tight and never had the issue again. I'm still surprised that despite having solid contact it didn't work. Also, the car was getting Warragamba sized pools of water in the back when it rained. My initial concern was another rust problem. But when I went out on Weds while it was raining and while I had no headliner in I could see a steady stream of water coming through the roof mounted aerial. As this aerial is for the (now removed) car phone I pulled it out and whacked a blanking grommet in the hole. It seems fine now. I'm thinking I might get the hole permanently filled when the rust is fixed. Moving forward and things in progress; The tailgate needs some attention. I have taken all the trim off to clean it all and address some small rust spots. I have partially done all of this but I'll finish it up hopefully this weekend. As all the trim are now entirely devoid of trim clips I have bought a heap of strong velcro and I'm hoping it does a good enough job as any of this trim in good condition is super expensive and usually in Europe as we dont have many of the wagons here. Suspension and brakes!!! This is exciting. In the front; New control arms New sway bar links New lower Eibach springs (the only modification I'm planning on this car) M Sport shocks (these came with the car and will replace the longer shocks in the car) New top mounts Used 540i calipers (stock brakes suck!) New 540i disks and pads (22x296 mm for 528 and 30x334 mm for 540i) New front wheel bearings (thank all that is holy for bolt on bearings!) Annnnd in the back; New control arms New sway bar links Adjustable air suspension arms (fool the car into what the current height is so the self levelling suspension can match the new front ride height) New ball joints I'll also be doing a brake fluid flush while I'm in there. I'm planning on switching the car over to the 16's that came with it so I can clean up and respray the M Sport 17's. They've lost a lot of colour over the years and have some gutter rash. None of this will start until the E90 is back.
    • You mean you will regret it for drifting duties? I don't quite follow.
×
×
  • Create New...