Gtr34 Getrag Boxes Shd Use Atf? Extremely Noisy

[streamer]

Hey guys,

Pardon me if i ask some really silly questions as im still quite new to my GTR and hoping to learn as much as i can.

Anyhow, my car was recently tuned by Eiichiro of Autoselect japan and then the clutch started slipping.

So i got it changed to the HKS GDMAX twin plate if im not mistaken and now the pedal is really light although the bite point is really small and the clutch is really catchy although im coming around to getting used to it.

The thing is, my mech told me that for the BNR34 GTR gearboxes that is made by Getrag, Getrag reccomends using ATF.

So he used Motul ATF for my tranny and according to him, its normal to be quite noisy. In fact, its noisy under low revs when accelerating around 1000 - 2500rpms.

And sometimes at idle, i can hear a rattling noise from the gearbox which was previously not there.

All the while, my car when it is shut off, there is a slight rattle from the gearbox when i kill the engine and it shudders before it goes off and i came to understand that it is prob from the gearbox mounts being worn off.

The rattle now at idle sounds like this particular sound but continous but goes away if you blip the throttle and keep the revs up.

Only abck at idle does the rattle come.

Does anyone have a similar experience or any feedback to share?

Is there any truth behind using ATF in the Getrag boxes cause its much noisier now and sounds rough so its making me worried..

Thanks a bunch for all the responses in advance!

Appreciate it.

Regards,

Kenny

[Faid]

dude i dont know who told you that you need to fill your gearbox up with ATF. and this sounds like a synchronizer prob, if im not mistaking. get your transmission fludhed, and put in redline lightweight shockproof. Since i put in my OS cross mission gearset i have been using it, i find it the best oil for the manual transmission, i even use the stuff in my toyota lancruiser. dude get another mechanic, why would someone put ATF into a manual gearbox, cant understand why

[Snowman]

Don't listen to the reply above as he doesn't know what he is talking about.

The Getrag does need to use an ATF. The Nissan Getrag Gearbox Fluid - which is the same as the Toyota Supra Gearbox fluid (as the gearboxes are the same) - is made by Castrol and can also be purchased under the name of Castrol Transmax Z from your local oil store. I'd highly recommend you use it. Also - there are some internal parts of the getrag that will be slowly destroyed if you use the Redline Shockproof (I can't exactly what they are) but that is the reason why you have to used ATF in the getrag gearboxes.

Before you upgraded your clutch to the twin plate the getrag was equipped with a dual mass flywheel. Once you upgrade the R34's to a twin plate and get rid of that flywheel they become noisey as fark. To prove my point - get in the car running at idle - listen to all the noise - the depress the clutch pedal. The noise will go away. So there is nothing basically wrong - it's just one of those things with an R34 GTR and a twin plate clutch.

[Snowman]

This was a letter reply to a supra guy that busted a gearbox using Redline by the people at Getrag. It's hard to understand - but the basic's is to use the recommended ATF fluid.

http://mkiv.com/techarticles/getrag/no_redline/getrag.html

[Faid]

dude im having a super hard time to belive it. Well since there is only one 34 in my country which is currently sitting at a car dealer. i have absolutly no experience with getrags. I just assume that for a manual tranny use MTF and for a auto ATF. i have a 33 so i use the redline.

[Snowman]

Yep wittout question use the Redline stuff on the 5 speed boxes in the R32 and R33's as it is tops. But I busted 2 sets of gears in the R34 before I learnt this lesson with the getrags.

Use the Castrol Transmax Z (ATF) - stay away from Redline in the getrags.

[R31Nismoid]

dude im having a super hard time to belive it. Well since there is only one 34 in my country which is currently sitting at a car dealer. i have absolutly no experience with getrags. I just assume that for a manual tranny use MTF and for a auto ATF. i have a 33 so i use the redline.

well if you have no expirience... it would stand to reason you shouldnt be giving information out it eh?

[streamer]

Snowman: Thanks alot bro for the help..

Its somewhat noisy but i dont think its the Castrol ATF you mentioned. If im not mistaken, its Motul ATF. Hows that on the 34 boxes?

Thanks again for the help..

[andylaurel]

yeah i was gonna say...

twin plate clutch brother...

interesting about the ATF though...

we use a splash of ATF in our MF5's to get the syncros spinning

[R31Nismoid]

The box makers specifically state that oil if i remember correctly.

[Abo Bob]

There are a number of manual gear boxes out there that use ATF in them. My dad's 4wd uses engine oil!!

[Snowman]

Snowman: Thanks alot bro for the help..

Its somewhat noisy but i dont think its the Castrol ATF you mentioned. If im not mistaken, its Motul ATF. Hows that on the 34 boxes?

Thanks again for the help..

the noise is from the clutch - not the gearbox (I'm guessing). As far as how good the Motul ATF is - I honestly don't know. All I do know is that the recommended oil from Nissan is just Castrol re-badged. So thats why I use the Castrol and I've never had an issue since using it.

[snake]

Hey guys,

Pardon me if i ask some really silly questions as im still quite new to my GTR and hoping to learn as much as i can.

Anyhow, my car was recently tuned by Eiichiro of Autoselect japan and then the clutch started slipping.

So i got it changed to the HKS GDMAX twin plate if im not mistaken and now the pedal is really light although the bite point is really small and the clutch is really catchy although im coming around to getting used to it.

The thing is, my mech told me that for the BNR34 GTR gearboxes that is made by Getrag, Getrag reccomends using ATF.

So he used Motul ATF for my tranny and according to him, its normal to be quite noisy. In fact, its noisy under low revs when accelerating around 1000 - 2500rpms.

And sometimes at idle, i can hear a rattling noise from the gearbox which was previously not there.

All the while, my car when it is shut off, there is a slight rattle from the gearbox when i kill the engine and it shudders before it goes off and i came to understand that it is prob from the gearbox mounts being worn off.

The rattle now at idle sounds like this particular sound but continous but goes away if you blip the throttle and keep the revs up.

Only abck at idle does the rattle come.

Does anyone have a similar experience or any feedback to share?

Is there any truth behind using ATF in the Getrag boxes cause its much noisier now and sounds rough so its making me worried..

Thanks a bunch for all the responses in advance!

Appreciate it.

Regards,

Kenny

I have a 34 GTR as well mate, although mine is completely stock, i also get a rattle when switching the car off. I also get a rattle at idle as well although in my case it seems to be the thrust bearing as it goes away when you depress the clutch pedal.

Good info about the ATF. Will keep that in mind.

[streamer]

Thanks for all the responses guys! Appreciate it..

I know the car is running Motul ATF.

When i depress the clutch, i hear the metallic ringing sound from the clutch that i really dont hear the gearbox.

But about that rattle sound that comes when i kill the car and at idle..

When i blip the throttle abit, initially, meaning the first second or so, the rattle increases intensity with the engine speed as im blipping the throttle on the car.

Could this mean a thrust bearing problem as well?

Thanks again for the responses guys!

[Angus Smart]

the rattle comes from using an aftermarket flywheel.

i use a getrag in my car.

and i was paranoid about thinking i bought a crap gearbox

only to find out that the standard flywheel has some kind of damper in the build?? someone might be able to explain that better

which kills the rattle

but when you go to an aftermarket clutch and flywheel (which is solid) you will get a rattle. it sounds scary but i got used to it

hope that can help

[Angus Smart]

Also reading what is said above about oils to use.

i beleive i have used redline gear oil. i forget the actual one tho it might have been light weight or super light weight.

what is ment to be used in the 34 gearbox?

[wrxhoon]

R34 GTRs use a dual mass flywheel ( some subarus use it as well). It can get noisy( slightly rattly) even in stock form . Twin plate clutches are rattly, some more than others.

The getrag box used in the R34 GTR uses a thinner oil than the 5 speeder of earlier models. If you are going to use redline in it you should use the extra lightweight shockproof as recomended by redline .

[Angus Smart]

cheers! i shall find out what they put in it tommorrow!

[R31Nismoid]

I would only be using the stuff Snowy mentioned.

Its what the actual MAKERS of the gearbox state...

Not what some oil company does to get sales of thier own product.

Remember, if you break it, its gonna hurt

[Angus Smart]

i wouldnt mind showing someone in sydney the noises i hear, who actually know what they are looking for..

it might just be the flywheel making the vibrations and knocking noises. as stated above when aftermarket clutch/flywheel is involved.

but i wouldnt mind just bieng sure.