Tranny Issues HELP. - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

whomiked · 08-26-2011, 08:00 PM

Well first of all the car grinds from 1st to 2nd gear when I shift normal. If I wait for the rpms to drop some between shifts I can get it not to grind. Lets say I floor the car in 1st then quick shift to 2nd it will just grind and will not go into 2nd until i let the rpms drop down.

Sometimes i'll put the car in neutral and it'll just start grinding and grinding until I put the clutch in...

Car shifts decent when car is cold and off.

Any ideas? Should I just pick up a new Tranny?

Any help would be appreciated.

*EDIT*
Forgot to mention it has a lightweight flywheel.

Biggamehit · 08-26-2011, 08:04 PM

have you ever changed the fluid.. also if you have changed it... did you put in gl4, gl5 or some other synthetic?

whomiked · 08-26-2011, 08:19 PM

Quote:

Originally Posted by Biggamehit

have you ever changed the fluid.. also if you have changed it... did you put in gl4, gl5 or some other synthetic?

No I haven't I was thinking about picking up some gl4 Ams oil, but If it's a bigger problem I don't want to waste $50 on oil...

whomiked · 08-27-2011, 11:38 AM

Bump anyone else want to chime in? I want to go Auto X but need this fixed!

Koukisr20 · 08-28-2011, 11:30 PM

Changing the gear oil may help but probably won't cure the problem completely. These gear boxes are plauged with problems like this. Weak syncros, shift forks and gears in general. Sounds like the solution is either a rebuild or replace. I have gone through 2 s15 six speeds with similar grinding problems as well as stripped gears and bent shift forks. The s15 six speed is much weaker than the five speed but they are both relatively weak in the grand scheme of transmissions. I'll be the first to admit I'm extra hard on transmissions however these gear boxes are extra sensative! They must be shifted slowly to keep from damaging them! These are all the reasons I'm going to be adapting a totally different trans into my car. Leaning towards a T56 so far. Just gotta work out all the details. Oh yea redline shock proof oil or ams oil helps too. Good luck to you!

whomiked · 09-15-2011, 05:51 AM

Bump anyone?

filipino4life92 · 09-15-2011, 01:14 PM

this is probably due to bad synchros. yeah everyone else said to change the fluid. if you haven't replaced the fluid over the past year or so then that MIGHT be the problem.

my opinion on it being bad synchros (the gold ringed) looking gears.

08-26-2011, 08:00 PM	#1
whomiked Zilvia Member Join Date: Sep 2004 Location: San Antonio Age: 33 Posts: 280 Trader Rating: (1) Feedback Score: 1 reviews	Tranny Issues HELP. Well first of all the car grinds from 1st to 2nd gear when I shift normal. If I wait for the rpms to drop some between shifts I can get it not to grind. Lets say I floor the car in 1st then quick shift to 2nd it will just grind and will not go into 2nd until i let the rpms drop down. Sometimes i'll put the car in neutral and it'll just start grinding and grinding until I put the clutch in... Car shifts decent when car is cold and off. Any ideas? Should I just pick up a new Tranny? Any help would be appreciated. EDIT Forgot to mention it has a lightweight flywheel.

08-26-2011, 08:04 PM	#2
Biggamehit Zilvia Addict Join Date: Jan 2005 Location: Misawa Japan Age: 38 Posts: 713 Trader Rating: (11) Feedback Score: 11 reviews	have you ever changed the fluid.. also if you have changed it... did you put in gl4, gl5 or some other synthetic? __________________ Facebook: Pink Ranger Drift

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08-27-2011, 11:38 AM	#4
whomiked Zilvia Member Join Date: Sep 2004 Location: San Antonio Age: 33 Posts: 280 Trader Rating: (1) Feedback Score: 1 reviews	Bump anyone else want to chime in? I want to go Auto X but need this fixed!

08-28-2011, 11:30 PM	#5
Koukisr20 Join Date: Aug 2011 Location: Colorado Age: 36 Posts: 18 Trader Rating: (1) Feedback Score: 1 reviews	Changing the gear oil may help but probably won't cure the problem completely. These gear boxes are plauged with problems like this. Weak syncros, shift forks and gears in general. Sounds like the solution is either a rebuild or replace. I have gone through 2 s15 six speeds with similar grinding problems as well as stripped gears and bent shift forks. The s15 six speed is much weaker than the five speed but they are both relatively weak in the grand scheme of transmissions. I'll be the first to admit I'm extra hard on transmissions however these gear boxes are extra sensative! They must be shifted slowly to keep from damaging them! These are all the reasons I'm going to be adapting a totally different trans into my car. Leaning towards a T56 so far. Just gotta work out all the details. Oh yea redline shock proof oil or ams oil helps too. Good luck to you!

09-15-2011, 05:51 AM	#6
whomiked Zilvia Member Join Date: Sep 2004 Location: San Antonio Age: 33 Posts: 280 Trader Rating: (1) Feedback Score: 1 reviews	Bump anyone?

09-15-2011, 01:14 PM	#7
filipino4life92 Leaky Injector Join Date: Mar 2010 Location: Virginia Age: 29 Posts: 59 Trader Rating: (1) Feedback Score: 1 reviews	this is probably due to bad synchros. yeah everyone else said to change the fluid. if you haven't replaced the fluid over the past year or so then that MIGHT be the problem. my opinion on it being bad synchros (the gold ringed) looking gears.