Strength Of V35 6 Speed Manual Gearbox

[R33_Dude]

I must firstly confess I have little knowlege of the V series of skylines - so I come in search of advice.

A friend of mine has just picked up his 2004 V35 350GT coupe with the six speed manual and is looking at the twin turbo and supercharger kits that are available.

One of the big questions though is how strong the stock gearbox is, I have searched for information and found vague torque limits. Does anyone know exactly how strong the gearboxes are - reports tend to vary wildly. 

Any info or links would be appreciated.

[rs73]

If you can't find anything on V35 skyline manual gearbox, do a search on 350Z manual 6-speed gearbox.

they are the same thing.

[ogz007]

+1 ^

[superspit]

Having busted one (6M) within weeks of purchase....and now having a new one...I know this....they are heavy bloody things, even when on a trolley! lol!

They are noisy/rattly bloody things too!...but they're strong, and should handle nominal power upgrades.....my mechanic agrees.

As for that diff?.....pffffft...who knows?

Hardly 'tech' words,..but hey, who gives a faaark!

[Stephen Thorpe]

  superspit said:

Having busted one (6M) within weeks of purchase....and now having a new one...I know this....they are heavy bloody things, even when on a trolley! lol!

They are noisy/rattly bloody things too!...but they're strong, and should handle nominal power upgrades.....my mechanic agrees.

As for that diff?.....pffffft...who knows?

Hardly 'tech' words,..but hey, who gives a faaark!

Strong... but you busted it... can you please explain a bit further?

What went wrong and how do you imagine that happened?

Was a new one costly?

[180 wanabe]

  Stephen Thorpe said:

Strong... but you busted it... can you please explain a bit further?

What went wrong and how do you imagine that happened?

Was a new one costly?

7000rpm launches with slicks on, flat changes etc

[superspit]

  180 wanabe said:

7000rpm launches with slicks on, flat changes etc

yes.....a little something like that...

and (incorrectly) attempting to engage reverse (by accident) at freeway speeds...(successfully).

[prdreilly]

  superspit said:

yes.....a little something like that...

and (incorrectly) attempting to engage reverse (by accident) at freeway speeds...(successfully).

My 04 model has a feature to prevent engaging reverse. You have to push the gearknob down to allow reverse to be engaged, doesn't yours have that?

[Stephen Thorpe]

not anymore!!!

[superspit]

  Stephen Thorpe said:

not anymore!!!

hehehehe....cheeky bugger!...lol!

It now has the 'notched' safety on reverse.

New box, flywheel and clutch (and mother) are doing well.

[BLISTC]

yeh mine also u have to push down to engage reverse

[superspit]

  BLISTC said:

yeh mine also u have to push down to engage reverse

yes, me too, nowadays.

[worldwalker]

I just cringed reading that. OUCH! Reading something like that to me was like imagining getting kicked in the crotch.

I heard a similar story from an indo driving a DC5R downshifting from 6th to 4th but was a bit too excited and hit 2nd... rev, bang.

On another note a bit of chattering is normal from these boxes? And a slight chatter when turning the ignition off? Its def the box because there is nothing with the clutch in.

[scathing]

  R33_Dude said:

One of the big questions though is how strong the stock gearbox is, I have searched for information and found vague torque limits.

There's a dude trying to sell a 535rwkW V35 on Carsales (Carl). See what he's done to his box, because he's had that setup for a while and he hasn't grenaded the gearbox yet.

The 03 boxes have a reputation for breaking (but that's even with NA bolt-on specs) but there are guys who've gone FI and tracked their cars (250-320rwkW) for a few years without breaking them. It sounds more like dodgy QC rather than an inherent design fault.

[worldwalker]

  worldwalker said:

I just cringed reading that. OUCH! Reading something like that to me was like imagining getting kicked in the crotch.

I heard a similar story from an indo driving a DC5R downshifting from 6th to 4th but was a bit too excited and hit 2nd... rev, bang.

On another note a bit of chattering is normal from these boxes? And a slight chatter when turning the ignition off? Its def the box because there is nothing with the clutch in.

anyone?

[scathing]

  worldwalker said:

I heard a similar story from an indo driving a DC5R downshifting from 6th to 4th but was a bit too excited and hit 2nd... rev, bang.

A mate of mine was telling me about a BMW track day his boss went to. Flying down the main straight of EC in an M3, tried to go from 4th to 3rd to prepare for Turn 1, hit the gate and pushed harder, and found 1st.

  worldwalker said:

On another note a bit of chattering is normal from these boxes? And a slight chatter when turning the ignition off? Its def the box because there is nothing with the clutch in

I only got symptoms similar to what you're describing when I fitted a JUN flywheel in my first box. Stock flywheel/clutch it didn't do it.

I did a Nismo clutch/flywheel when I fitted a second 'box, and it's the same now. A little rattle on idle with the clutch out, which stops when I clutch in. It only happens when the driveline is warm though.

I'm not sure if the Nismo flywheel is dual mass or not, but I heard it was. That might be the flywheel for a single plate clutch instead though.