Which bearing is making noise from my transmission?

You would definitely have to take the transmission out again to have the bearings checked, replaced.

This should be from the internal and most likely the input shaft bearing is bad. The transmision has to be stripped to do it and while you are there, have other bearings checked as well, if they are not bad, they might be failing as well.

I just did that the other day Khlow same symptom and its the front drive main gear bearing on a Nissan P/U 5speedo

Nissan P/U are well known for this. Done plenty of them and the going price for owners are rather costly.

This is the problem I keep getting. Everyone keeps telling me something different. I dont have the money to replace every single bearing that i think it is. The Release bearing was already replaced but that doesnt always mean its good just because its new.

We have given our opinion based on information you have provided. to believe or not is your choice.

You yourself understand how the clutch release bearing works and described in detail why it is not the problem, why are you contradicting yourself now?

Its costly allright-make money though, didn't lift a finger being the brainman-lol all I did is say drop it check the clutch assy-okay open the front cover bearing cage was almost gone-end of troubleshoot-1995 Nissan P/U Bye you take care Malay

Same to you Jess, my work is done here as well.

If members don't know hot to do something, we can help, if they don't have money, too bad it is beyond our capabilities.

Well in your opinion what should I do then? Replace the Input Shaft Bearing. I'm not excatly sure what the front drive main bearing is. Sorry if that came out the wrong way. I didn't mean to offend you guys. I just keep hearing replace the pilot bearing and replace the release bearing and replace this and that and no one is ever sure.

And when you said check other bearings, which bearings exactly?

Honda does not use any pilot bearings.

The mainshaft and countershaft has bearings supporting them and they turn when the clutch is not depressed. Those are the bearings you need to look at.

So the Mainshaft is actually where the Input Shaft Bearing sits correct? I Have a bearing inside my flywheel. I bought the clutch kit that came with a clutch disc pressure plate release bearing and pilot bearing. If Honda doesnt have pilot bearings then what bearing is that?

Sorry, my bad. For this model a pilot bearing is used but it definitely is not the cause of your problem. If the clutch is not depressed, the pilot bearing is locked to the flywheeland does not turn on its axis. It is only when clutch is depressed and mainshaft is not turning when the pilot bearing is used.

The input shaft is the mainshaft. Item #22 would be the one most likely to be bad. Item # 25 is the end bearing and that should be checked as well.

Yea when you said they didn't use pilot bearings I kind of scratched my head thinking what the heck is that then lol. Is there any kind of special tool I need to take off the input shaft bearing? I really liked how you explained how the pilot bearing works. Can you also explain how the release bearing works because its not a type of release bearing I'm used to seeing. This one is clipped on to the edge of the fork and the inside race of the release bearing actually rides on the mainshaft.

When clutch pedal is released, the release bearing is backed away from the clutch pressure plate and is not turning. When clutch pedal is depressed, the clutch bearing moves forward to press against the clutch pressure plate. When the diaphgram springs are depressed by the release bearing, the disc becomes free. That wouls stop the mainshaft from turning and whatever noises coming from the mainshaft onwards would stop.

The release bering is not riding on the mainshaft, it is on the housing od the mainshaft.

To replace the internal bearings, you would need to strip the transmission completely.

Ok I kinda have a better understanding of how it works. Thanks. Once I replace the mainshaft bearing and possibly the end bearing I will keep you updated whether or not the noise went away. Thanks for your help.

When the transmission is disassembled, you need to test the bearing. If you turn the bearing on their axis when attached to the mainshaft, you should be able to feel coarseness indicating wear. For needle bearings, visual inspection is required. Any that does not have a shiny surface on the cones needs attention.

Ok thanks for the tips.

i'm 100% this is the input shaft bearing of the transmission
my solution is just go get a transmission in used car scrap yard for 150$ and install it.
i just did it on my protegé 1999 all by hand alone with the jack that come with the car and i still have a certain vibration cause by the clutch I asume it cause the damage to the previous transmission.
so i need to do the work again to change the clutch before it breaks the transmission bearing again.
Vibrations are the worst for any mechanical device.
thats the cheapest way to do it and you might have a low millage transmission for less than 300$

Great addition to this thread! Please feel free to help out on the site whenever it can add information that will help.

Cheers, Ken

i have a 2001 honda civic 5 speed lx and its making a weird noise from transmission i guess and when i push the clutch in the noise goes away i need to know if this is a input shaft bearring or throwout bearring. i took it to several mechanics and they said it could be either one which is no help at all. please let me know a solid answer thanks

With the mileage on your car it could be an input shaft bearing. However, if it shifts good and seems to behave otherwise, Hondas are prety tough and the bearings last for a long time.

The throwout bearing is definately bda as when you put pressure on it, the moise goes away. If it were the input shaft, the noise might even get louder as doing this allows the input shaft more freedom to move around becasue the clutch plate is free to move and it is attached to the end of the input shaft.Also, your pilot bearing is in need of replacement as well.
Depending on what you plan to do with the car, you can fix this in 2 ways. You can get a kit with a friction plate, pressure plate, thrwout bearing and pilot bearing. The other option is to just get a friction plate and you usually have to get the pilot and throwout seperately in that case. Some companies will include them but not many. The problem with the friction plate only is that the pressure plate cannot be re-surfaced and the friction plate might not engage smoothly after break in.
You will also have to re-surface the flywheel if you want to do it the right way with the full clutch kit.
Getting just the friction plate and bearings is just a patch and can cause vibration and other issues, but it will work for a while. If you plan to drive it till it dies and not keeping it for long, jsut patch it.

Transmission problem
1997 Honda Civic 4 cyl Front Wheel Drive Manual 119Km miles

There is an intermittent noise coming from the transmission. The noise is a clunka .. clunka .. clunka type which is in synchronism with the engine RPM ONLY WHEN the clutch is out. The noise occurs in neutral, 1, 2, 3, 4, 5 and reverse. It seems to get quieter in the higher gears. The interesting part is that the noise can stop altogether - and transmission noises sound normal - until the engine RPM reaches about 3000, then the noise restarts.
I have checked the transmission oil level - OK.
Looking into the the bell housing where the release fork is I've noticed what looks like a scoring mark on the pressure plate. With the clutch engaged (pedal pushed in) the noise stops. The pressure plate is still rotating of course but I'm wondering if the plate is loose somehow and pressure on it from the release bearing is pushing it up against the flywheel moving it away from whatever is touching and scoring it.
I hope it is a loose pressure plate and not something internal in the gearbox.
Any ideas?
Jeff.

Hi Jeff,

Seems smething is loose or has dropped into the bell housing and might require the trans to be removed to verify.

Remove the splash shield under trans and engine to check if you can see anything.

I took the splash shield off. It only revealed the flywheel. However nothing fell out. There is a bit of oil in this area. Looks like its coming from the main bearing seal. The engine oil level has never been a problem though. See pic. I had another look at the pressure plate. The marks on the plate I mentioned before look more like tool marks not scoring marks. The only thing I can think of that may have damaged the trans. is driving though flood water. What usually happens is after a few hours is the clutch plate and flywheel become stuck together. After the car is started it sometimes won't go into gear. So I turn the engine off, put it in first, push the clutch in and then start it. The car of course lurches forward until the clutch is unstuck. I cant see the starter generating enough torque to brake trans. parts. I don't remember any trans. noise straight away though.

Intermittent noise is not likely to be due to trans internal components failing.

From the symptom description, it should be external. Does depressing the clutch slightly cause the noise pevel or pitch to change?

No. Only beyond the clutch take up position does the noise stop. You can hear the noise decrease in pitch to nothing as the momentum of the clutch plate and main shaft spin down. Takes about 1 second. I could make a recording of it and send it to you if you like.

Jeff.

So we can conclude that the noise is present when the main shaft is turning.

Worn trans internal bearings would produce whining noises instead of what you have described. The only possibllity of the described noise is a bad bearing, one of the balls is cracked or rough thus causing the noise.

Looks like you would have to at least drop the trans to check out.

The problem of the clutch sticking after going through floods should not be the cause of the problem. However water getting into the trans or any external bearings would.

Yes, I guess one of the main shaft bearings is the problem. However if I push the clutch in while the car is moving the noise diminishes. Only under load does the noise increase in volume. Looks like I'm in for an expensive repair anyway.
Thank you very much for your time and expertise.

Jeff.

You are welcomed and too bad this is something that cannot be avoided.

Thank you for using 2carpros.

Transmission problem
1997 Honda Civic 4 cyl Front Wheel Drive Manual 135000 miles

When my car is running idle in neutral the transmission makes a grinding type of noise. When I step on the clutch the noise goes away. Is this a clutch issue or bearing inside the transmission?

I've seen this noise be both the transmission input shaft bearing (inside the transmission) as well as the clutch release bearing (a clutch bearing).

My recommendation: Pull the transmission and check the release bearing first, if it is not the culprit, it's the input shaft bearing located inside the transmission.

Transmission problem
1998 Honda Civic 4 cyl Front Wheel Drive Automatic 150000 miles

while driving thecar acts like its been dropped into neutral turn the car off right back on it goes drive awhile then its like you dropped it into neutral turn off right back on it goes i hear no noise at all

Hi nick1980,

Did you check the trans fluid level and condition?