| Author |
Message |
Eric Hawley (Eric)
New member
Username: Eric
Post Number: 39
Registered: 8-2001
| | Posted on Sunday, January 12, 2003 - 11:44 am: | |
Hi Ming,
I'll post my reply to your question about the differences between the '95 and '01 in an email, since it's a bit long winded, and really off topic for this thread.
eric |
Ming Cheng (Onlinesys)
Junior Member
Username: Onlinesys
Post Number: 129
Registered: 5-2002
| | Posted on Saturday, January 11, 2003 - 9:19 pm: | |
Hi Eric,
Your explanation/suggestion seems to be the most informative to me. I try to drive the car at least twice a week and I reckon driving it more is better to all F-cars. What did you find the main difference between the M456 and the old 95' 456?
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Eric Hawley (Eric)
New member
Username: Eric
Post Number: 38
Registered: 8-2001
| | Posted on Saturday, January 11, 2003 - 11:20 am: | |
Hi Ming,
I�ve been following your recent acquisition quietly for a few months now. Congrats on buying a great car. I traded my �95 456GT for the �01 456MGT last April, and just love the car. I know you'll get a ton of fun out of it.
The clutch and t/o bearing are mounted to the engine in this car. A torque tube encases the driveshaft from the bellhousing mounted to the back of the engine, back to the gearbox/transaxle. There are three bearings inside that torque tube to support the driveshaft, and it's possible one of those has gone bad, or is on its way out. This could be particularly true of a car that hadn't seen frequent miles prior to you purchasing it. The grease on the bearings might have hardened up, or the bearings have started to rust, or???
I can imagine the pressure of the clutch being depressed putting some different loads on the shaft and causing some noise here. I'm no mechanic, just a shade tree hack, so take this as just more conjecture and speculation based on a similar experience. When my �95 started making noises like this, it was a bad thing. It turned out to be a failed input shaft bearing on the transmission. Not an inexpensive problem, as this led to inappropriate wear throughout the transmission, and necessitated a complete overhaul of the transmission. Fortunately, the car had been traded in already, and it wasn't my headache to deal with.
Enjoy the car, and drive it as much as possible! I�ve enjoyed my 456s so much I can hardly keep out of the car.
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Ming Cheng (Onlinesys)
Junior Member
Username: Onlinesys
Post Number: 128
Registered: 5-2002
| | Posted on Friday, January 10, 2003 - 9:02 pm: | |
Hi Eric,
I am driving a 456GT with front engine and the gearbox and transmission should be at the back.
I drove the car this morning but can't hear the sound any more!
Could it be a bearing problem if it is an intermittent noise?
Thank you |
Eric Hawley (Eric)
New member
Username: Eric
Post Number: 37
Registered: 8-2001
| | Posted on Friday, January 10, 2003 - 12:11 pm: | |
If the noise is not coming from the clutch area (mid-car, at the rear of the engine) then maybe this is a bearing in the torque tube that supports the drive shaft, or even more ominous, a bearing at the input of the transmission.
I'd get the car into the shop soon. And say thanks to the diety of your choice that you paid for the warranty. |
Ming Cheng (Onlinesys)
Junior Member
Username: Onlinesys
Post Number: 127
Registered: 5-2002
| | Posted on Friday, January 10, 2003 - 9:42 am: | |
Hi Peter,
There is nothing wrong with the car in driving so I will see you guys on this Sunday. I called the agent and told them the sympton but he reckoned it might not be the O/T bearing as the sound was from the rear end of the car rather than from the clutch in front of me?!
I still heard the noise when I depressed the clutch after switching on the car for warming up before driving back home this evening. However, the noise was gone after I arrived home and I tried depressing the clutch (floor it or touch it) or even holding it but no more noise?!!
Strange!
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Peter (Bubba)
Junior Member
Username: Bubba
Post Number: 243
Registered: 5-2002
| | Posted on Friday, January 10, 2003 - 7:24 am: | |
Ming, sorry to hear that the clutch on your 456 is creating funny noises. Guess you won't be coming out this Sunday? I suppose it's covered under warranty, so let the dealer take care of it.
BTW, I took my Mondial down to Sai Kit today to check out a non-working speedometer. Looks like I need to change the speed sensor. Got the engine bay cleaned and sprayed. Looks fresh in the engine compartment now! |
Ming Cheng (Onlinesys)
Junior Member
Username: Onlinesys
Post Number: 125
Registered: 5-2002
| | Posted on Thursday, January 09, 2003 - 8:24 pm: | |
Tx. Henry,
I will have the agent to check it out tomorrow. I still heard the noise this morning but after about 15 minutes drive the noise was gone.
I will check again when I drive the car back home from the office tonight.
Will let you know the answer after the inspection(you might have given me the right one already!)
Cheers |
Henryk (Henryk)
Member
Username: Henryk
Post Number: 391
Registered: 8-2001
| | Posted on Thursday, January 09, 2003 - 7:56 pm: | |
If it is the throw-out bearing, and you do not replace it, then other parts will be damaged as you wait for the "...next clutch replacement".
Have someone look at the car soon.
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Henryk (Henryk)
Member
Username: Henryk
Post Number: 390
Registered: 8-2001
| | Posted on Thursday, January 09, 2003 - 7:53 pm: | |
If the clutch is bad, then replace it, otherwise replace only the throw-out bearing. I have done this before. Why spend more money than you have to? Have someone knowledgeable look and evaluate the clutch.
Who saids that the clutch and throw-out bearing always goes out in pairs?....these are two SEPARATE parts, that just happen to work in the same system. |
Ming Cheng (Onlinesys)
Junior Member
Username: Onlinesys
Post Number: 124
Registered: 5-2002
| | Posted on Thursday, January 09, 2003 - 3:29 am: | |
Kurt --- Do you mean I have to get a new clutch now or replace the throw out bearing on the next clutch replacement?
Tx. |
Kurt Kjelgaard (Kurtk328)
Junior Member
Username: Kurtk328
Post Number: 167
Registered: 3-2001
| | Posted on Thursday, January 09, 2003 - 3:20 am: | |
I consider the throw out bearing as a wear item.
Renew with new clutch regardless of apparent condition. |
Ming Cheng (Onlinesys)
Junior Member
Username: Onlinesys
Post Number: 123
Registered: 5-2002
| | Posted on Wednesday, January 08, 2003 - 11:13 pm: | |
What sort of damage(cost) if it is really the problem of the throw-out bearing? Is it part of the wear and tear of the Clutch?
I reckoned the noise is from the rear end of the car as the gear box should be located at the back. |
Henryk (Henryk)
Member
Username: Henryk
Post Number: 389
Registered: 8-2001
| | Posted on Wednesday, January 08, 2003 - 10:50 pm: | |
Seems like the throw-out bearing. It may be starting to go. When you depress it, the extra turning time and pressure, may make the noise go away.
Keep in mind that the cluth pedal end touches and pushes only on the throw-out bearing. What else could it be?
If so, then the problem will eventually get worse.
I hope I'm wrong, but.........!!!!!!
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Ming Cheng (Onlinesys)
Junior Member
Username: Onlinesys
Post Number: 122
Registered: 5-2002
| | Posted on Wednesday, January 08, 2003 - 10:46 pm: | |
Tx. Henry. It's just the same noise no matter I floor it or just depress Lightly (sort of just touching the clutch).
However, the noise seems go away when I hold the clutch.
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Ming Cheng (Onlinesys)
Junior Member
Username: Onlinesys
Post Number: 121
Registered: 5-2002
| | Posted on Wednesday, January 08, 2003 - 10:44 pm: | |
Tx. Henry. It's just the same noise no matter I floor it or just depress Lightly (sort of just touching the clutch).
However, the noise seems go away when I hold the clutch.
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Henryk (Henryk)
Member
Username: Henryk
Post Number: 386
Registered: 8-2001
| | Posted on Wednesday, January 08, 2003 - 10:07 pm: | |
If the noise stays the same (with clutch depressed), whether you floor it, or just idle it, it would suggest a problem with the throw-out bearing......possible replacement.
If the noise, or it's frequency changes, with the above, then it would suggest rubbing of the clutch on the flywheel........possible adjustment.
My 2 cents worth!!!! |
Ming Cheng (Onlinesys)
Junior Member
Username: Onlinesys
Post Number: 120
Registered: 5-2002
| | Posted on Wednesday, January 08, 2003 - 9:08 pm: | |
Hi John,
No the noise is not subtle. You can hear it with the Windows opened. Once I depress the clutch, it comes again! I don't think it is normal as I've never encountered in the last four weeks.
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John Li (Pchop)
New member
Username: Pchop
Post Number: 43
Registered: 6-2002
| | Posted on Wednesday, January 08, 2003 - 9:00 pm: | |
Ming, is the noise subtle? i.e. you need to pay close attention in order to hear it?
I had similar noise on mine, but the dealer told me the noise is normal due to the fact that the clutch uses hydralic mechanisms.
Keep me posted...I'm interested in what you find out. |
Ming Cheng (Onlinesys)
Junior Member
Username: Onlinesys
Post Number: 119
Registered: 5-2002
| | Posted on Wednesday, January 08, 2003 - 8:55 pm: | |
Hi Everyone,
Got my 94' 456GT for a month and I enjoyed every moment. A "uh,uh,uh" noise could be heard when I depressed the clutch no matter if I floor it, press a little bit or change gear. The clutch works fine in different gear.
I suspect the gear box should be identical with the 355 series. Any one encountered before?
Tx. guys!
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