Gears Hard To Get In..

[cobrAA]

Hello!

I went from a OS Giken TS2B to a TS3B. I also installed the Nismo slave cylinder with SS clutch lines so it got new fluid too.

I also changed the fluid of the transmission ( I don't know what is was before) to 2 liters of MT90 and 2 liter of Lightweight shockproof.

The clutch engagement ( clutch pedal) feel, IMO, smoother than it was before with the oem slave ( some says it doesnt do anything but I really feel it).

However, my major problem is the shifter! I have the impression I'm breaking the gears/shifter every time I try to go in 1st. IT'S REALLY HARD! getting in 2nd is a little easier and 3-4-5 is slightly ''stiffer'' but I don't mind it. Dowshifting is not really a problem ( i.e: 5 to 3)

It's really my 1st and 2nd that make the car less fun to drive than before. What could it be? not enought fluid? time for a nismo solid shifter?

thanks for the input!

[GTSBoy]

2 possible causes there.

1. Not enough disengagement of the clutch.

2. Horrible mixture of transmission lubes leading to synchro wierdness. Why did you mix shockproof with MT90?

[Moodles2]

Do you have both Nismo clutch cylinders or just the Nismo slave + Nissan master?

Also did you know Nismo/Nissan only recommend the Nismo clutch cylinders for single plate clutches? (they go to the effort on a Nismo coppermix to say to not use Nismo cylinders)

[cobrAA]

2 possible causes there.

1. Not enough disengagement of the clutch.

2. Horrible mixture of transmission lubes leading to synchro wierdness. Why did you mix shockproof with MT90?

Heres my thinking; shockproof protect synchro, so I will add some LIGHT shockproof to the mix in order to protect our fragile synchro. I heard other people doing it. Maybe I was wrong.

Suck to waste 50$ of fluid but i've made bigger mistake in the past so I wont be mad about it.

Redline told me to try the car in reverse, if it feel correct, it means the clutch is disengaging correctly. does that make sens?

Edited October 20, 2012 by cobrAA

[cobrAA]

Do you have both Nismo clutch cylinders or just the Nismo slave + Nissan master?

Also did you know Nismo/Nissan only recommend the Nismo clutch cylinders for single plate clutches? (they go to the effort on a Nismo coppermix to say to not use Nismo cylinders)

I have nismo slave and oem nissan master. dont think nismo make a nismo master anyways?

This stand correct for the COPPERMIX and nismo twins. but it doesnt stand for any other twin and or triple plate clutch on the market. Nismo use a different types of material for their clutch.

[89CAL]

Heres my thinking; shockproof protect synchro, so I will add some LIGHT shockproof to the mix in order to protect our fragile synchro. I heard other people doing it. Maybe I was wrong.

Suck to waste 50$ of fluid but i've made bigger mistake in the past so I wont be mad about it.

Redline told me to try the car in reverse, if it feel correct, it means the clutch is disengaging correctly. does that make sens?

There is no synchro in reverse so this is why they will be telling you to try this

Regardless of what the problem is, drop the oil and put redline lightweight ONLY in the box. I don't like the idea of mixing oils

[Moodles2]

I have nismo slave and oem nissan master. dont think nismo make a nismo master anyways?

Probably right there, I could have sworn there was a nismo master.

This stand correct for the COPPERMIX and nismo twins. but it doesnt stand for any other twin and or triple plate clutch on the market. Nismo use a different types of material for their clutch.

Quoting from: http://www.nismo.co.jp/en/products/competition/clutch/pdf/clutch09.pdf

"Coppermix and non-asbestos clutch discs are equipped with cushion plates and should not be used with the big operating cylinder."

I don't know if the OS Giken falls into the above, but I have read other people use non-Nismo twins/triples and have issues with stroke (clutch engagement being too short) with the Nismo slave.

I'm not a fan of mixing gear oils either, I've never once read anyone on here mixing shockproof with another gear oil. It's always straight shockproof.

[cobrAA]

I'm not a fan of mixing gear oils either, I've never once read anyone on here mixing shockproof with another gear oil. It's always straight shockproof.

I asked Osgiken tech support about the nismo slave and they said it was perfectly fine. I can also admit it really make the pedal a lot softer which I appreciate. (or maybe my oem was giving up). But I know my mecanic told me he had a problem with the slave, the rod was too short I think, so he had to take the rod on my OEM and swap it with the one on the nismo slave. maybe the problem is here ?

I guess I will start by putting only MT90. ( this is what tech support at redline told me to do).

BTW, when I took the car to the gym I tried to play with the clutch and noticed that I could make the gears grind in second while downshifting from 3 to 2. It felt like when you accelerate too quickly and you didn't release completely the clutch pedal but I'm sure my clutch pedal was fully on the floor meaning I clearly have a disengaging issues.

Edited October 20, 2012 by cobrAA

[GTSBoy]

Do you know how to rev match a down shift? After a certain point (in terms of gearbox loading and/or age) it becomes pretty much a necessity.

[cobrAA]

Do you know how to rev match a down shift? After a certain point (in terms of gearbox loading and/or age) it becomes pretty much a necessity.

box and synchro have been rebuilt in a shop 2 years ago. never rev-matched my car.

Osgiken recommend to cut 4 mm off the center plate or the shaft .. my mechanic didn't do it. This might be the cause. However he can't see how this could change anything so before that I'm thinking about having him installed my old oem slave . if this ever resolve the problem, I'm worried about how the pedal will feel.

[cobrAA]

I realised in os giken manual they ask to cut the shaft of the center plate by 4mm. the mechanic didnt do it. You think this could be the cause of everything?

Or else, I can only think of the slave.