grinding in transmission PLEASE HELP!!! - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Nick 240 · 07-19-2008, 09:52 PM

ok i recently did a ka24e to a ka24de swap on my 90 240sx hatch and motor is fine but i hear a grinding of the throwout bearing in my tranny when i have my foot off of the clutch. When i push it in the grinding stops. I greased everything and made sure i put it together right. i even pushed the fork in where the slave cylinder goes to check for clearance and it had clearance. I have no idea what it could be. Please help!!

Pacman · 07-21-2008, 01:03 PM

Front inout shaft bearing. With the car in neutral, foot off the pedal the noise is there. When the clutch is depressed, the noise goes away. The input shaft is spinning when the clutch engaged. If it was your throw out bearing, it would happen when the clutch is engaged. Get a bearing kit or just the one and install new bearing in the tranny. I'm doing bearings and synchros in mine, I have what you're explaining and gear grinding. ><

aznpoopy · 07-21-2008, 02:01 PM

when your foot is off the clutch the throw out bearing is not engaged.

throw out bearing is used when the clutch pedal is depressed. that pushes the throw out bearing against the pressure plate teeth which lifts the clutch disk off the flywheel.

weird whirring noises heard at neutral with the your foot off the clutch / clutch engaged is probably the input shaft bearing, which is internal to the transmission.

Pacman · 07-22-2008, 02:53 PM

Quote:

Originally Posted by aznpoopy

weird whirring noises heard at neutral with the your foot off the clutch / clutch engaged is probably the input shaft bearing, which is internal to the transmission.

As I said. Its behind the front cover, you may be able to pull the bearing off without opening the tranny, just removing the cover.

shade · 07-23-2008, 03:06 PM

Adjust the clutch pedal before doing anything else. That might just be it.

Nick 240 · 07-25-2008, 05:08 PM

Pacman do you think you can give me a write up of how to take off the front input shaft bearing. also how hard is it? how much does it cost? and where can i get it? Thanks

lazysk8er2 · 07-26-2008, 09:02 PM

yea i recently bought an 88 300zx na it has 170k and it makes a whiny noise but when i put my foot on the clutch is also stops making the noise. gonna look at it next week let you know what i find

07-19-2008, 09:52 PM	#1
Nick 240 Leaky Injector Join Date: Jun 2008 Location: Moreno Valley Posts: 85 Trader Rating: (5) Feedback Score: 5 reviews	grinding in transmission PLEASE HELP!!! ok i recently did a ka24e to a ka24de swap on my 90 240sx hatch and motor is fine but i hear a grinding of the throwout bearing in my tranny when i have my foot off of the clutch. When i push it in the grinding stops. I greased everything and made sure i put it together right. i even pushed the fork in where the slave cylinder goes to check for clearance and it had clearance. I have no idea what it could be. Please help!!

07-21-2008, 01:03 PM	#2
Pacman Zilvia FREAK! Join Date: Sep 2003 Location: Ohio Age: 33 Posts: 1,147 Trader Rating: (1) Feedback Score: 1 reviews	Front inout shaft bearing. With the car in neutral, foot off the pedal the noise is there. When the clutch is depressed, the noise goes away. The input shaft is spinning when the clutch engaged. If it was your throw out bearing, it would happen when the clutch is engaged. Get a bearing kit or just the one and install new bearing in the tranny. I'm doing bearings and synchros in mine, I have what you're explaining and gear grinding. >< __________________ In search of a Zenki S14 right side (passenger) fender and straight hood that are rust free.

07-23-2008, 03:06 PM	#5
shade Zilvia Junkie Join Date: Mar 2008 Location: San Diego Age: 32 Posts: 509 Trader Rating: (0) Feedback Score: 0 reviews	Adjust the clutch pedal before doing anything else. That might just be it. __________________

07-25-2008, 05:08 PM	#6
Nick 240 Leaky Injector Join Date: Jun 2008 Location: Moreno Valley Posts: 85 Trader Rating: (5) Feedback Score: 5 reviews	Pacman do you think you can give me a write up of how to take off the front input shaft bearing. also how hard is it? how much does it cost? and where can i get it? Thanks Last edited by Nick 240; 07-25-2008 at 08:21 PM..

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07-21-2008, 02:01 PM	#3
aznpoopy Post Whore! Join Date: Mar 2003 Location: New Jersey Age: 40 Posts: 5,013 Trader Rating: (1) Feedback Score: 1 reviews	when your foot is off the clutch the throw out bearing is not engaged. throw out bearing is used when the clutch pedal is depressed. that pushes the throw out bearing against the pressure plate teeth which lifts the clutch disk off the flywheel. weird whirring noises heard at neutral with the your foot off the clutch / clutch engaged is probably the input shaft bearing, which is internal to the transmission.

07-26-2008, 09:02 PM	#7
lazysk8er2 Zilvia FREAK! Join Date: Jul 2008 Location: on an island, NY Age: 35 Posts: 1,375 Trader Rating: (11) Feedback Score: 11 reviews	yea i recently bought an 88 300zx na it has 170k and it makes a whiny noise but when i put my foot on the clutch is also stops making the noise. gonna look at it next week let you know what i find