Heres what happens when you lose 3rd gear - Page 6 - GT-R Register - Official Nissan Skyline and GTR Owners Club forum

moleman · 5th August 2008, 11:06 AM

Quote:

Originally Posted by Madden

They do sound good but what it the conversion price? £4000 +?

Soz mate, only just seen that if it was directed at me.

I bought used but freshly rebuilt Getrag and transfer box for £1800. Exeddy clutch/flywheel is around £1200 and bespoke lightweight single piece prop was £n/k. lol

I had it done when the car was built, so was part of a much bigger bill, so honestly can't tell you how much it was.

Abbey did it mate, so speaking to Tony is your best bet.

Madden · 5th August 2008, 11:11 AM

You got that gearbox well cheap. Where did you get that from?

tyndago · 27th August 2008, 03:37 AM

The problem is the clutch. You need a sprung hub clutch,and shift easier into 3rd.

If not, then the OS gearset will last longer, but you can still break it. It still has the same problem of gear mismatch in 3rd.

I ran an OS gearset in a 600whp R32 for a while, and it was fine. Another guy with a 700 hp car broke 2 in succession. Both were during freeway races.

The Getrags break other parts. Shifting sprags and the like. For the R34 race car the would last about 2 track days before we would break one. Probably more driver than car though. We also went though a few parts in the Holinger.

I have seen one broken shift fork on a PPG box. That was more driver error than gearbox or gear related. And with that its something to think about too.

kismetcapitan · 27th August 2008, 08:09 AM

are Nismo Coppermix clutches sprung hub?

Piggaz · 27th August 2008, 08:41 AM

Toby. Yes they are.

Piggaz · 27th August 2008, 08:44 AM

Quote:

Originally Posted by Smokey 1

an OS Giken 1234 we had managed plenty of action in the Lemon and Micks Gold R32, then into the whistely job and finally the Taisan it must have done 30,000 miles and bloody hundreds of drag launches.

The Taisan now has a OS Giken 12345 kit in there and it is spot on. I can deffo recommend the OS Giken kit mate and if you are Drag racing a lot with around 600 bhp it will out last a standard box for sure.

Smokey

Did those boxes with have the Billet Centre plate in it?

Smokey 1 · 27th August 2008, 09:18 AM

Quote:

Originally Posted by Piggaz

Did those boxes with have the Billet Centre plate in it?

Yes mate, the center plate was fitted to that box

Smokey

NITO · 27th August 2008, 09:19 AM

I agree with Sean,

I had an RC3 OS Giken clutch and knackered a 3rd gear syncro on the upchange on my Getrag. I had no problems with the box previously ever. I put it down to the shock loading of the clutch also (although I was told I was talking bollox so I'm glad someone else experienced is in agreement). There is a previous thread on this somewhere.

I went back to the Nismo twin plate with the larger spline conversion while the box was apart and didn't knacker the syncro again despite a lot more power and the twin is so much better to use anyway. I wouldn't go with an OS triple plate clutch again, I don't see the point when there are twins that can handle pretty much enough power for most applications, I think the ATS carbon twin was 900bhp from memory with the 1350 clutch cover, also sprung. I bought an ATS twin carbon to go with Tim's old OS88 but sold them both before ever using them unfortunately.

Live and learn!

Nito

kismetcapitan · 27th August 2008, 11:13 AM

Quote:

Originally Posted by Piggaz

Toby. Yes they are.

God bless Nismo!!

Madden · 27th August 2008, 11:27 AM

Yea i know it's the clutch. If they only done a sprung center hub then all would be sweet. The clutch isnt to bad to drive with around town but I can't afford to lose the money i have spent on this clutch to get another one.

Car is all up and running again with another set of stock gears so let's see how long it last's this time. Going to take it easy into 3rd and see what happens.

tyndago · 27th August 2008, 02:39 PM

I would replace the clutch. The sprung hub does make a difference. It softens that shockload when you let the clutch out hard. Enough, that combined with the Shockproof Heavy gearoil that the transmission lasts longer.

I know this feeling of ripping teeth off gears. I have done it a few times.

stagea-RS4-96 · 27th August 2008, 04:05 PM

Get an auto box!! lol.

tyndago · 27th August 2008, 04:10 PM

Quote:

Originally Posted by stagea-RS4-96

Get an auto box!! lol.

Quickest way A to B. ATI has the adaptor.... put a turbo 400 in it. Knock a second off your 1/4 mile time.

Ian C · 8th September 2008, 09:24 PM

Just quick one madden:
Are you running billet selectors and who makes them?

if i'm going to rebuild my OSG box i might go for this....(that or get the original parts shot peened)

Thanks, Ian

Madden · 9th September 2008, 01:39 PM

No mate they are all stock selectors. Just clean

How much did you get that box for?

27th August 2008, 09:19 AM	#83 (permalink)
NITO GTR Register Member Join Date: Nov 2003 Location: Kent Posts: 1,368	I agree with Sean, I had an RC3 OS Giken clutch and knackered a 3rd gear syncro on the upchange on my Getrag. I had no problems with the box previously ever. I put it down to the shock loading of the clutch also (although I was told I was talking bollox so I'm glad someone else experienced is in agreement). There is a previous thread on this somewhere. I went back to the Nismo twin plate with the larger spline conversion while the box was apart and didn't knacker the syncro again despite a lot more power and the twin is so much better to use anyway. I wouldn't go with an OS triple plate clutch again, I don't see the point when there are twins that can handle pretty much enough power for most applications, I think the ATS carbon twin was 900bhp from memory with the 1350 clutch cover, also sprung. I bought an ATS twin carbon to go with Tim's old OS88 but sold them both before ever using them unfortunately. Live and learn! Nito __________________ "She'll make .5 past lightspeed"

8th September 2008, 09:24 PM	#89 (permalink)
Ian C GTROC Member Join Date: Jun 2003 Location: Buckingham Posts: 1,261	Just quick one madden: Are you running billet selectors and who makes them? if i'm going to rebuild my OSG box i might go for this....(that or get the original parts shot peened) Thanks, Ian __________________ +10 extra bhp for £55.... Get your baffled TWIN TURBO pipe now from GTR.co.uk Shop

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5th August 2008, 11:11 AM	#77 (permalink)
Madden New Users Join Date: Nov 2004 Location: Berkshire Posts: 2,078	You got that gearbox well cheap. Where did you get that from?

27th August 2008, 03:37 AM	#78 (permalink)
tyndago GTR Register Member Join Date: Oct 2002 Location: LBC , CA Posts: 2,267	The problem is the clutch. You need a sprung hub clutch,and shift easier into 3rd. If not, then the OS gearset will last longer, but you can still break it. It still has the same problem of gear mismatch in 3rd. I ran an OS gearset in a 600whp R32 for a while, and it was fine. Another guy with a 700 hp car broke 2 in succession. Both were during freeway races. The Getrags break other parts. Shifting sprags and the like. For the R34 race car the would last about 2 track days before we would break one. Probably more driver than car though. We also went though a few parts in the Holinger. I have seen one broken shift fork on a PPG box. That was more driver error than gearbox or gear related. And with that its something to think about too.

27th August 2008, 08:09 AM	#79 (permalink)
kismetcapitan GTR Register Member Join Date: Nov 2005 Location: Seoul Korea Posts: 6,401	are Nismo Coppermix clutches sprung hub?

27th August 2008, 08:41 AM	#80 (permalink)
Piggaz GTR Register Member Join Date: Sep 2002 Location: Sydney, Australia Posts: 758	Toby. Yes they are.

27th August 2008, 11:27 AM	#85 (permalink)
Madden New Users Join Date: Nov 2004 Location: Berkshire Posts: 2,078	Yea i know it's the clutch. If they only done a sprung center hub then all would be sweet. The clutch isnt to bad to drive with around town but I can't afford to lose the money i have spent on this clutch to get another one. Car is all up and running again with another set of stock gears so let's see how long it last's this time. Going to take it easy into 3rd and see what happens.

27th August 2008, 02:39 PM	#86 (permalink)
tyndago GTR Register Member Join Date: Oct 2002 Location: LBC , CA Posts: 2,267	I would replace the clutch. The sprung hub does make a difference. It softens that shockload when you let the clutch out hard. Enough, that combined with the Shockproof Heavy gearoil that the transmission lasts longer. I know this feeling of ripping teeth off gears. I have done it a few times.

27th August 2008, 04:05 PM	#87 (permalink)
stagea-RS4-96 GTR Register Member Join Date: Feb 2008 Posts: 386	Get an auto box!! lol.

9th September 2008, 01:39 PM	#90 (permalink)
Madden New Users Join Date: Nov 2004 Location: Berkshire Posts: 2,078	No mate they are all stock selectors. Just clean How much did you get that box for?