Clutch - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Farmstore34 · 03-14-2010, 10:25 PM

Well guess what,

I installed a brand new clutch in my 72 K20, did everything by the book, started it up and the dumb clutch is making a terrible rattling/scraping sound right from the pressure plate. It does it whether its engaged or disengaged, and gets worse as the RPMs go up. Now I get to pull it all back apart, and I really need my truck. Frustrating!!

**LockDoc** · 03-14-2010, 10:34 PM

-
It sounds like you might have the clutch plate in backwards... One side should be stamped "Flywheel" or "Flywheel Side".

LockDoc

Shyguy · 03-14-2010, 10:37 PM

Sorry to hear that you have problems with the clutch you installed. Hopefully it is not anything major.

We installed a clutch in my '71 this weekend and luckily everything went ok. It was a real pain getting the engine in and I sure was not looking forward to pulling it back out or dropping the heavy 4 speed.

Good luck.

Danny

Farmstore34 · 03-15-2010, 01:28 AM

I'm sure the clutch plate is on the right way, but I guess I will find out. And, of course I have to deal with the transfer case as well as the heavy SM465.

Jacfourteen · 03-15-2010, 02:06 AM

did you replace the throwout and pilot bearings? both of those would change sound when the clutch was engaged/disengaged though....not sure what it could be. Let us know when you find out.

hicktownhotrodder · 03-15-2010, 02:51 PM

did you put on a new flywheel, or get the old one ground? thats what it sounds like to me.

**DPowers** · 03-15-2010, 03:06 PM

I had a sound something like that on my automatic- it was the dust cover rubbing against the flywheel.

69 longhorn · 03-15-2010, 08:04 PM

Quote:

Originally Posted by DPowers

I had a sound something like that on my automatic- it was the dust cover rubbing against the flywheel.

i agree, ....pull the dust cover & see if the problem goes away. crazyAL

Farmstore34 · 03-16-2010, 01:20 AM

I installed all new parts- pilot bearing, T/O bearing, pressure plate etc. I did have my original flywheel resurfaced, but I'm not sure how that could cause the noise. I also thought of the dust cover rubbing, but I pulled it off and ran it- no change. The noise is definitely coming from the pressure plate. Hopefully I'll get up enough energy to take it all apart this week and find the problem.

Trip59 · 03-16-2010, 03:06 AM

I just swapped in a 4spd from a TH350, brand new flywheel, brand new clutch kit and bearing, aluminum housing from a 60's chevy in great shape, the 4 speed was professionally rebuilt. Started it up and heard a noise like beans in a coffee grinder (well, how they sound at first). Same symptoms, but then it would go away and come back occasionally.

Before panicking and yanking it back apart I thought about it...

I shimmed the starter and the noise went away.

Trip

GMC AMI · 03-16-2010, 06:04 AM

Quote:

Originally Posted by Farmstore34

I'm sure the clutch plate is on the right way, but I guess I will find out. And, of course I have to deal with the transfer case as well as the heavy SM465.

I found it easier to pull the motor on my 4x4s to do the new clutch. I also found the best place to buy new HD clutches In FT. Wayne. I have bought two of them brand new, not rebuilt ones, for around 100 bucks with everything included even the alignment tool. The local NAPA wanted close to 300. I have been real happy and if someone wants to know the place send me a PM and I would be glad to help.

Farmstore34 · 03-25-2010, 12:56 AM

Guess what! I DID NOT put the clutch disc in backwards! I am sorta relieved, but now I have to take it back to the parts store and see about a replacement.
Colby.

NORMSCOLORADO · 03-25-2010, 01:19 AM

what happened loose rivets?

Farmstore34 · 03-29-2010, 03:51 AM

Well, I finally got the clutch installed, and it works great. My parts guy exchanged the first one out, we still have not figured out what was wrong with it. This apparently was the first bad clutch he ever had come back. I am relieved to have this project done!

**DPowers** · 03-29-2010, 09:00 AM

Congrats- glad it worked out.

03-14-2010, 10:25 PM	#1
Farmstore34 Registered User Join Date: Mar 2007 Location: Oregon Posts: 109	Clutch Well guess what, I installed a brand new clutch in my 72 K20, did everything by the book, started it up and the dumb clutch is making a terrible rattling/scraping sound right from the pressure plate. It does it whether its engaged or disengaged, and gets worse as the RPMs go up. Now I get to pull it all back apart, and I really need my truck. Frustrating!!

03-14-2010, 10:34 PM	#2
LockDoc The Older Generation Join Date: Aug 2006 Location: Montezuma, Iowa Posts: 25,773	Re: Clutch - It sounds like you might have the clutch plate in backwards... One side should be stamped "Flywheel" or "Flywheel Side". LockDoc __________________ Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 -

03-14-2010, 10:37 PM	#3
Shyguy Junior Member Join Date: Dec 2006 Location: Southeast Missouri Posts: 2,436	Re: Clutch Sorry to hear that you have problems with the clutch you installed. Hopefully it is not anything major. We installed a clutch in my '71 this weekend and luckily everything went ok. It was a real pain getting the engine in and I sure was not looking forward to pulling it back out or dropping the heavy 4 speed. Good luck. Danny __________________ '67 Chevy C-20 short stepper - build complete, 454/SM-465. '75 C-30 Single Cab DRW-350 small block/NP-435. '77 GMC-6500 Dump Truck, 427 Tall Deck. '92 GMC K-3500 Duallie, 454/4L80E.

03-15-2010, 01:28 AM	#4
Farmstore34 Registered User Join Date: Mar 2007 Location: Oregon Posts: 109	Re: Clutch I'm sure the clutch plate is on the right way, but I guess I will find out. And, of course I have to deal with the transfer case as well as the heavy SM465.

03-15-2010, 02:06 AM	#5
Jacfourteen Big Red - Now its a SWB! Join Date: Jun 2009 Location: Oroville, Ca Posts: 1,624	Re: Clutch did you replace the throwout and pilot bearings? both of those would change sound when the clutch was engaged/disengaged though....not sure what it could be. Let us know when you find out. __________________ 68 3/4 ton (Project)-350 Small Block, .030 over, 10:1 comp, 3998993 heads, C3BX edelbrock intake, comp cams XE268, Holley 670 SA, long tube headers, dual flow 40's, E-fan, Alum rad, currently under the knife getting shortened and bagged build thread 41 3/4 ton (wife's)-flatbed, fully restored to original 01 Tahoe LT 4WD (my daily driver)-Magnaflow Muffler, Rollin on 22's 02 Ford Mustang Convertable (Wife's Car)-Flowmaster 50, Clear corners, Intake, sittin on 18's

03-15-2010, 02:51 PM	#6
hicktownhotrodder Rollin Coal Join Date: May 2009 Location: Winnebago Illinios Posts: 131	Re: Clutch did you put on a new flywheel, or get the old one ground? thats what it sounds like to me. __________________ I have three letters to all these import guys: God-Made-Chevy 04 GMC Sierra 2500HD Duramax 1972 Chevrolet C-30 Dually Pickup stock? 350 SM465 four speed 1977 GMC K-35, TH-400, 4X4 450 horse 454(dad's) 1993 Dodge cummins 5-speed DEAD!!

03-15-2010, 03:06 PM	#7
DPowers One foot in front of the other Join Date: Aug 2008 Location: Parrottsville, TN Posts: 5,442	Re: Clutch I had a sound something like that on my automatic- it was the dust cover rubbing against the flywheel. __________________ DP's 66 Build http://67-72chevytrucks.com/vboard/s...d.php?t=361556

03-16-2010, 01:20 AM	#9
Farmstore34 Registered User Join Date: Mar 2007 Location: Oregon Posts: 109	Re: Clutch I installed all new parts- pilot bearing, T/O bearing, pressure plate etc. I did have my original flywheel resurfaced, but I'm not sure how that could cause the noise. I also thought of the dust cover rubbing, but I pulled it off and ran it- no change. The noise is definitely coming from the pressure plate. Hopefully I'll get up enough energy to take it all apart this week and find the problem. Last edited by Farmstore34; 03-16-2010 at 01:21 AM.

03-16-2010, 03:06 AM	#10
Trip59 Who needs sleep... Join Date: Aug 2009 Location: Middleburg, Florida Posts: 260	Re: Clutch I just swapped in a 4spd from a TH350, brand new flywheel, brand new clutch kit and bearing, aluminum housing from a 60's chevy in great shape, the 4 speed was professionally rebuilt. Started it up and heard a noise like beans in a coffee grinder (well, how they sound at first). Same symptoms, but then it would go away and come back occasionally. Before panicking and yanking it back apart I thought about it... I shimmed the starter and the noise went away. Trip

03-25-2010, 12:56 AM	#12
Farmstore34 Registered User Join Date: Mar 2007 Location: Oregon Posts: 109	Re: Clutch Guess what! I DID NOT put the clutch disc in backwards! I am sorta relieved, but now I have to take it back to the parts store and see about a replacement. Colby.

03-25-2010, 01:19 AM	#13
NORMSCOLORADO Registered User Join Date: Oct 2008 Location: JAY, NY Posts: 176	Re: Clutch what happened loose rivets? __________________ 04 Chevy Colorado Z71 4X4 76 Chevy C-10 Custom Deluxe (sold) 67 Chevy C-30 1 Ton 9' stepper 6.5 Turbo Diesel

03-29-2010, 03:51 AM	#14
Farmstore34 Registered User Join Date: Mar 2007 Location: Oregon Posts: 109	Re: Clutch Well, I finally got the clutch installed, and it works great. My parts guy exchanged the first one out, we still have not figured out what was wrong with it. This apparently was the first bad clutch he ever had come back. I am relieved to have this project done!

03-29-2010, 09:00 AM	#15
DPowers One foot in front of the other Join Date: Aug 2008 Location: Parrottsville, TN Posts: 5,442	Re: Clutch Congrats- glad it worked out. __________________ DP's 66 Build http://67-72chevytrucks.com/vboard/s...d.php?t=361556

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