GTR Gearbox Poll - Page 4 - GT-R Register - Official Nissan Skyline and GTR Owners Club forum

MrRoboto · 16th July 2005, 09:58 PM

The Getrag 6 is definitely not more reliable than the 5 in the 33. I was going to do the conversion myself (which includes a change of three propshafts, two going aft and one forward), until another 33 which did the same conversion had a problem with his gearbox. Turns out the box synchros had an early retirement, apparently...

GT-R Glenn · 10th September 2005, 11:40 PM

When I biult my new engine I fitted a low k gtr box at the same time , filled it with redline lightweight gear oil ....after a season of drag racing it now is impossible to put into 4th without crunching it....

radicalradam · 16th September 2005, 05:12 PM

Mine, GTR32, crunches both ways, 4th to 5th and also 5th to 4th, unless you're super gentle and let the box slowdown between changes.........sometimes that means a second!!!........no probs from 3rd to 4th like a few are experiencing. After reading here I'm gonna go for the heavy shockproof gearoil and see if it makes any difference..........worth a try before considering a rebuild I guess.

Here goes nothing!!!

RR

Bubble · 17th September 2005, 07:24 AM

Quote:

Originally Posted by radicalradam

Mine, GTR32, crunches both ways, 4th to 5th and also 5th to 4th, unless you're super gentle and let the box slowdown between changes.........sometimes that means a second!!!........no probs from 3rd to 4th like a few are experiencing. After reading here I'm gonna go for the heavy shockproof gearoil and see if it makes any difference..........worth a try before considering a rebuild I guess.

Here goes nothing!!!

RR

Well the Heavy Shockproof worked for mine and 4,000 miles later on it is still perfect

Little Dragon · 17th September 2005, 09:32 AM

2 words
Double Declutch!!!

kingsley · 20th September 2005, 07:39 PM

3rd to 4th crunches if and only if I've come from 8000rpm in 3rd and do a quickish change. Otherwise all is fine. I voted for "Stock box was fine but now causing some concern whilst changing..".

GTR-Zilla · 20th September 2005, 08:45 PM

no one double de clutches these days.. you mean heel and toe?

Little Dragon · 20th September 2005, 11:07 PM

Heel and toeing is something completely different!!!
I still use double declutching every day, admittedly it is a technique from the days of crash gearboxes, still useful though!!!
I'm changing my gearbox oil tomorrow, see if it smoothes it out a bit, used to be ok till I fitted a twin plate clutch!!!

radicalradam · 21st September 2005, 04:28 PM

Quote:

Originally Posted by Little Dragon

2 words
Double Declutch!!!

================================================== ========
Another two words

I do!!!

And some more...............

after you've driven a 560bhp cobra with an antique muncie box with no synchro you kinda get into that habit of always double declutch-ing......so the GTR box seems sweet compared to that monster.

Anyways, I did the Redline Heavyshock proof thing and hey presto!!.........sweet as!!!

Hopefully it'll last for a while so I can learn to DOUBLE DECLUTCH!!!!!! before I rebuild it.

Thanks for the advice guys (that's about the oil not the driving!)

RR

rockabilly · 6th November 2005, 09:49 PM

[little dragon], mans got a point, 53k 406bhp lots of track days , quarter mile sprints, 33gtr and double de-clutch up and down the box, a little rev when gearing down, no probs with my box at all.

Moff · 27th February 2006, 09:40 AM

into 3rd and into 4th Crunch. I put some Heavy shockproof in which hasn't solved the problem....

hmmmm

Moff

gtr mart · 27th February 2006, 12:12 PM

has it made it any better? Before, if you were gentle and at lower revs - would it always crunch?

Moff · 27th February 2006, 07:24 PM

it takes a few mins to warm up, once it is, the gears are a lot smoother if gentle, just not when givin' it large...

Moff

kenan · 27th February 2006, 07:27 PM

When my box is cold she don't like first, so I dont use it

Moff · 27th February 2006, 07:36 PM

How do you get off your drive

Moff

View Poll Results: GTR Gearboxes....
Stock box fine and serves its purpose well, no problems yet thanks..	149	43.19%
Stock box was fine but now causing some concern whilst changing..	80	23.19%
Stock box doing my head in now and needs changed asap!	10	2.90%
Stock box let me down and now on 2nd.. 3rd... 4th...replacement..	21	6.09%
Rebuilt stock box and very happy now thanks!	18	5.22%
Killed rebuilt box and need a really expensive one.. HKS..O/S..	9	2.61%
I have a really expensive box.. and am a smug b**tard thanks ;-))	37	10.72%
None of the above	25	7.25%
Multiple Choice Poll. Voters: 345. You may not vote on this poll

16th September 2005, 05:12 PM	#48 (permalink)
radicalradam GTR Register Member Join Date: Jul 2005 Location: West London Posts: 71	4th to 5th and back to 4th Mine, GTR32, crunches both ways, 4th to 5th and also 5th to 4th, unless you're super gentle and let the box slowdown between changes.........sometimes that means a second!!!........no probs from 3rd to 4th like a few are experiencing. After reading here I'm gonna go for the heavy shockproof gearoil and see if it makes any difference..........worth a try before considering a rebuild I guess. Here goes nothing!!! RR

6th November 2005, 09:49 PM	#55 (permalink)
rockabilly rb30 710bhp Join Date: Oct 2003 Location: lancashire Posts: 1,049	[little dragon], mans got a point, 53k 406bhp lots of track days , quarter mile sprints, 33gtr and double de-clutch up and down the box, a little rev when gearing down, no probs with my box at all. __________________ fancy the south of france. http://st-tropez.mysite.orange.co.uk/

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16th July 2005, 09:58 PM	#46 (permalink)
MrRoboto GTR Register Member Join Date: Oct 2003 Location: Honkers Posts: 25	The Getrag 6 is definitely not more reliable than the 5 in the 33. I was going to do the conversion myself (which includes a change of three propshafts, two going aft and one forward), until another 33 which did the same conversion had a problem with his gearbox. Turns out the box synchros had an early retirement, apparently...

10th September 2005, 11:40 PM	#47 (permalink)
GT-R Glenn GTR Register Member Join Date: Nov 2002 Location: Waiuku NZ Posts: 1,227	When I biult my new engine I fitted a low k gtr box at the same time , filled it with redline lightweight gear oil ....after a season of drag racing it now is impossible to put into 4th without crunching it....

17th September 2005, 09:32 AM	#50 (permalink)
Little Dragon GTR Register Member Join Date: Apr 2004 Location: East Yorks Posts: 228	2 words Double Declutch!!!

20th September 2005, 07:39 PM	#51 (permalink)
kingsley GTR Register Member Join Date: Aug 2002 Location: West Surrey Posts: 1,800	3rd to 4th crunches if and only if I've come from 8000rpm in 3rd and do a quickish change. Otherwise all is fine. I voted for "Stock box was fine but now causing some concern whilst changing..".

20th September 2005, 08:45 PM	#52 (permalink)
GTR-Zilla Banned Join Date: May 2005 Location: London Posts: 2,099	no one double de clutches these days.. you mean heel and toe?

20th September 2005, 11:07 PM	#53 (permalink)
Little Dragon GTR Register Member Join Date: Apr 2004 Location: East Yorks Posts: 228	Heel and toeing is something completely different!!! I still use double declutching every day, admittedly it is a technique from the days of crash gearboxes, still useful though!!! I'm changing my gearbox oil tomorrow, see if it smoothes it out a bit, used to be ok till I fitted a twin plate clutch!!!

27th February 2006, 09:40 AM	#56 (permalink)
Moff GTR Register Member Join Date: Sep 2004 Location: Reading Posts: 348	into 3rd and into 4th Crunch. I put some Heavy shockproof in which hasn't solved the problem.... hmmmm Moff

27th February 2006, 12:12 PM	#57 (permalink)
gtr mart GTR Register Member Join Date: Mar 2004 Posts: 1,637	has it made it any better? Before, if you were gentle and at lower revs - would it always crunch?

27th February 2006, 07:24 PM	#58 (permalink)
Moff GTR Register Member Join Date: Sep 2004 Location: Reading Posts: 348	it takes a few mins to warm up, once it is, the gears are a lot smoother if gentle, just not when givin' it large... Moff

27th February 2006, 07:27 PM	#59 (permalink)
kenan GTROC Member Join Date: Apr 2003 Location: Exeter, Devon Posts: 1,900	When my box is cold she don't like first, so I dont use it

27th February 2006, 07:36 PM	#60 (permalink)
Moff GTR Register Member Join Date: Sep 2004 Location: Reading Posts: 348	How do you get off your drive Moff