Forums/Z31P/z31-performance-upgrade-forums driveline-aa/Bad clutch or 30a tranny?
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amreboot: (2012-04-26 04:26:06)
So I am working on my Shiro.
The car has 95k miles.
The problem is it grinds while shifting every gear.
What I have done so far....
Bypassed clutch damper with 280zx hose.
Bled entire clutch system with new fluid.
Adjust clutch pedal rod.
The master and slave have no sign of leakage. Both parts seem to be new have the Nissan logo stamp, OEM.
Drained and refilled the tranny with new fluid.
Replaced shifter bushing with new OEM.
The reason why I am asking this question is that I am not 100% sure its the tranny's syncros.
Generally when a tranny starts to grind, its 1 or maybe 2 gears (depending on syncro) that grinds.
This is EVERY gear.
Which makes me think that the clutch is old, worn, and not properly disengaging.
I did a little googling and found that it IS possible for a bad clutch to do this.
What are your thoughts or suggestions?
I also want to add that the tranny is making a whine that relates to the RPMs. This would tell me worn gearing or something…
edicer2: (2012-04-26 04:41:52)
could it be a bent fork or something?
Careless: (2012-04-26 04:43:26)
pressure plate.
amreboot: (2012-04-26 04:52:44)
I also want to add that the tranny is making a whine that relates to the RPMs. This would tell me worn gearing or something…
Careless: (2012-04-26 04:54:16)
one of my 30A's makes a whine noise (it's cool :lol: )
but if it wasn't making that sound before… time to pull'er oooooot [archived image: frown.png]
amreboot: (2012-04-26 04:55:16)
Well, I don't know the history of the car. I have only had the Shiro for 3 weeks.
So all this is new to me.
My friend's 87 turbo with the 30a makes the same whine noise. While its making the noise, he has no problems shifting, and he shifts like a mad man.
G-E: (2012-04-26 04:56:31)
wrong throw-out bearing?
amreboot: (2012-04-26 04:58:15)
Doubt it. This car screams out all original. I honestly think it has the original clutch from 88.
There are no signs of any work other than the NISSAN timing belt replacement sticker.
NissanEgg: (2012-04-26 04:59:22)
Possible input shaft bearing whine. My
G-E: (2012-04-26 05:00:06)
drop the tranny and take a looksee.. seeing makes things clearer
amreboot: (2012-04-26 05:05:40)
The 30a in this Shiro feels notchy and weird as well compared to the 30a in my 89.
I am not sure what to think. Maybe its time to look for the 2wd 30a from a pathy or hardbody.
NissanEgg: (2012-04-26 05:09:24)
My
amreboot: (2012-04-26 05:15:48)
Alright, so I am not too much in the dumps here.
From what everyone is telling me, it sounds like a clutch issue. Which is awesome.
As far as the whine, its not too loud. You can only hear it if going through an under-pass or something.
I am still going to hit the junk yard this weekend and look for a 2wd 30a.
I see them all the time.
Dr. Pepper PhD.: (2012-04-26 21:48:33)
Sounds a lot like an input shaft bearing to me. Cheap part, but you might as well do the clutch while the tranny is out.
G-E: (2012-04-26 22:35:55)
yea the constant whining and extra noise when there's pressure means it's one of the bearings related to the shaft, I figured it might be the throw out because I've seen shops install the wrong one
Guest: (2012-04-27 00:59:27)
Mine grinds going into third every 10th time or so. No noise at all, shifts smoother than any other transmission I've ever had.
-Strike-: (2012-04-27 01:53:17)
Mine likes to grind going from 2nd to third during more spirited driving some times, and first to second during slow speed engagement. I do also have the input shaft bearing whine aswell. It's almost time for a rebuild if it gets any worse, at around 172,000 miles on it, but it's doing it's job for now, just depends on how I drive it. ;d For the most part it's pretty solid, and no other noticable noises or anything. New Amsoil fluid in it now.
amreboot: (2012-04-27 17:51:13)
Dropped it off at AAMCO at lunch for them to look at it. Free of charge.
Will update later.
amreboot: (2012-04-27 21:53:02)
They called and said its an internal problem. I had to be brief with them on the phone so I will know more about it here after work.
Careless: (2012-04-27 22:12:57)
lulz.
aamco soft seal rebuild is 500 bucks.
aamco full rebuild is 4500 bucks.
they apparently do not have access to parts for these cars, or so they say.
maybe they think people with older cars are stupid and will pay anything to have them run.
new trans from dealer is like 3250
-Strike-: (2012-04-28 01:52:46)
I got quoted 1095 to have mine rebuilt from one shop, including all new bearings, syncros and seals. Thought that was a pretty decent deal.
MADMIKE: (2012-09-22 02:06:05)
Ha my 90a developed a similar issue a week or two ago. Though she is leaking too.