Nissan 370Z Forum - Transmission Issue After Track Day

Nissan 370Z Forum (http://www.the370z.com/)

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- - Transmission Issue After Track Day (http://www.the370z.com/engine-drivetrain/45979-transmission-issue-after-track-day.html)

Quote:

Originally Posted by VQStryker (Post 1436963)

:tup: great news! bet that was a relief

:iagree:

Quote:

Originally Posted by SPOHN (Post 1436635)

Finally after a long stressful week I've got around to going over my car. First thing my dad and I did today was bleed my clutch. Soon as we started there was a good bit of air in there. Pretty shocked actually. I've bleed this several times before with no issues like this. Must have to be from the track day beating with a combination of moisture in the fluid.

Also I thought I had great pedal feel and I did but not like it was after bleeding the system. But all and all everything seems back to the norm. Shifting perfect and the notchness is gone. Maybe this will save me some dough for a little bit longer. I'd still like to hear some more input if you guys have any.

Also after looking at my brake pads I wore them babies half way out. Woot. Better get some more. I should get another good day out of them. Course there's not another track event till spring and I drive on the XP 8's. But not DD.

A lot of 'vette owners have this issue. It's caused by clutch-dust getting into the fluid. If the 370Z has a dedicated clutch-fluid resivoir/system, then I bet this could be a lot of issue people have with synchro's going out. It's not necessarily the synchro's, but rather the fluid getting very dirty and eating the seals in the hydraulics up and causing issues shifting that would feel like synchro's going out.

My solution is to suck the fluid out of the resivoir with a 60cc syringe and replace it every time I get gas. Fluid stays clean, hydraulics fresh, shifting smooth.

So many people spending a LOT of money they don't have to on new hydraulics, etc. because they don't do this in the GM world. I am thinking maybe the 370Z is similar, as the mechanics of a hydraulic clutch are somewhat universal. Could be wrong, but it's something to look into. IT got so bad that one guy sent of his clutch-fluid to be analyzed, and yes,there was a lot of clutch dust in it.

Just a thought.

Yea I forgot to mention. There was dirt and small particules in there.

Got my car checked out by another place couple days ago and tho i had more difficulty demonstrating the diff(?) issue -the tech said "well, im not sure if were getting much done here but I'm sure enjoying the **** outa this"- lol, with some very spirited corners I did get it to happen (doesnt happen as much after you drive the car for a while -shrug-).. anyway all we could figure is its "in some way" the diff. Its not a constant whine/screech like a bearing... perhaps i warped one of the plates in the sealed inner chamber of the diff and when it slips due to wear i get vibration... I dont know. For now not too worried about it, when viscous diffs fail they just become open diffs, not a huge deal till I'm back at the track next season.

Glad to hear you think you got your issue solved Spohn, if there were noticeable particles in there I would vote that that was your issue, every time ive heard of people changing their tranny fluid they were always really suprised how clean it was.

Yea I glad it was that easy for me. My luck usely doesn't work that way. Now I need to change my diff fluid.