GonZ

While I was under the car tearing things apart, I can't help but to think how ridiculous it was having to do all that work just to change out a $5.98 dollar part. My slave cylinder gave out two weeks ago from today, I replaced it and it happened again the day after. So I suspected the withdrawal lever pivot pin, a $5.98 part, was broken. Sure enough, after dropping the tranny, the first thing that rolled out was the broken pin. I had to drill and used a retractor to take out the threaded part. On a brighter note, I find out the rear tranny mount was totally twisted and eff'ed, I had no idea how it could have gotten that way. So now the tranny and the Z is just sitting there waiting for a new mount, a $75 part, to come. This should really help the sloppiness that the tranny has lately. Some pic taken with the phone:

RN7676

What year is your car? I thought 03 - 06 had a traditionally designed slave cylinder on the outside of the bellhousing with a clutch fork / lever that went through the bellhousing to operate the throwout bearing. Then 07 had a redesign that eliminated the clutch fork and moved the slave cylinder to the inside of the clutch bellhousing.

Meaning 03 - 06 had a clunky, leverage robbing, 50+ year old design that was reliable and easy to work on. Then 07 had a smoother, 'better', faster, more accurately operable design that was harder to work on.

Am I right or wrong? Based on your teardown, I figure you'd know!

RN7676

ok wait, I think I get it now. Your slave cylinder is on the outside, but you have a problem with the ball pin that the clutch fork pivots on (which is inside the bell housing). How in the world did that break? Do you have a high force pressure plate or something? A part like that should be hardened, polished, and should last virtually forever. .... Then again, I guess anything mass produced could likely have some units with un-noticed metallurgy problems that cause them to crack, break, or somehow fail prematurely.

Anyways, I'm trying to learn from all your bolt turning in case I have to do it to my car or somebody elses someday. .. So let me know!

GonZ

you're correct! My slave cylinder is outside but it is the pivot pin inside the tranny that broke! Apparently i'm not the only victim, if you do a search it had happened before. If you can grab the fork and move it in and out, the pin is broken. For future reference the part number is 30537-40P01

Sam@GTM

iTrader: (7)

We have seen this problem before, Here what we came up with .

GT Motorsports Upgraded "4140 " pivot Replaces The weak part of the clutch release system ..


http://gtmotorsports.com/product.php...cat=263&page=1

Sam

GonZ

yeah for those who are doing clutch/ plate upgrade you better upgrade this as well since you already have the tranny out.

terrasmak

iTrader: (8)

Hey Sam , how does this effect the clutch? Mine over the past 2 years has been getting harder and harder to push. Could this be the problem, i've heard rumor of it, just want a definate answer before i order and drop my tranny.

Evilmexicaninus

iTrader: (21)

Hey Sam.I will be ordering and installing the GTM CLUTCH PIVOT REPLACEMENT with my Nismo SuperCopper Mix Twin Disc Clutch and would like to replace the clutch line.Any difference between the GTM and Nismo Clutch Line besides price?My tranny mount is efff'd up too any aftermarket solutions for that?

bbs350z

iTrader: (85)

ordering this asap lol

Sam@GTM

iTrader: (7)

This part does not have any effect on clutch feel, it could effect the engagements if worn out and it will completely kill the clutch operation if it's brakes .

Sam

Sam@GTM

iTrader: (7)

No difference, just the price .

Sam

BriGuyMax

iTrader: (4)

I know this thread is from last month but I'm having a issue with the pivot ball in thebackup trans I just picked up for my car.

I have a carbonetic twin disc clutch and my original trans (008) is in Michigan at my buddies shop awaiting a custom third gear, so we can't reference the pivot ball in that trans. Went to install the clutch fork and TOB from my original trans in the backup trans (003) and noticed that the pivot ball in the backup trans is much longer than the one in my other trans.

I can't remember if my carbonetic clutch came with a new shorter pivot ball and fork along with the TOB, so I guess my question is are there different length pivot ***** for different revisions of our trans??

EDIT:

Alright, I figured out that a different (longer) pivot ball and stamped steel clutch fork was part of the 03 and early 04 transmissions. Since my original trans is an 008 is has the shorter pivot ball and a much beefier cast clutch fork. So I now either have to use the old setup with the longer ball or the new setup and pick up a short pivot ball (since my other one is in michigan.

bbs350z

iTrader: (85)

so this works for th 008 and 009?

BriGuyMax

iTrader: (4)

Not GTM's pivot ball by the looks of it. You need the shorter one if you want to "upgrade". Concept Z offers both the shorter and longer one.