The Ford Barn

Antique_iron · 01-25-2023, 10:09 AM

My original and unrestored 28 Tudor hammers and shudders when engaging the clutch at a standstill in 1st or reverse. I suspected an oil soaked clutch disc (not a muliti disc) due to a rear main leak but after pulling the engine and transmission that is not the case.

What should I be looking for? A bad input shaft bearing perhaps? Thank you in advance...

Bob Bidonde · 01-25-2023, 10:25 AM

It may be clutch chatter caused by misalignment, oil/grease contamination, a warped flywheel, damaged clutch disk or a warped / damaged pressure plate.
It has been my experience that clutch chatter causes transmission oil to splatter into the bell housing and contaminate the clutch. Over-filling the transmission can cause this.

Patrick L. · 01-25-2023, 11:06 AM

Sure sounds like clutch chatter. It's usually a warped/heat checked flywheel or mis adjusted pressure plate fingers. A bad disk or unsprung disk can contribute to it.

Oil contamination will cause it, but, I've not found that to happen.

I find this stuff easier to remove the transmission rather than the engine. Plus I can lay under there and take a nap.

Antique_iron · 01-25-2023, 01:27 PM

Does the surface on the flywheel where the pressure plate mounts get machined as well?

Kurt in NJ · 01-25-2023, 03:22 PM

is it a multi disc clutch or was it updated to single disc

Antique_iron · 01-25-2023, 06:55 PM

Sponsored Links (Register now to hide all advertisements)

It's a single disc set up.

1crosscut · 01-25-2023, 07:28 PM

Had a friend have the same symptoms a few years ago with a newly rebuilt clutch. Finally found that the new clutch disk had a slightly raised area on one face about the diameter of a nickel. Had to look hard to find it. Changed out the disk and all was well.

Joe K · 01-26-2023, 02:32 PM

It is commonly done to "surface" the flywheel/clutch surface, but not always necessary. Even "cracks" are tolerable provided the surface is not "scored" more than perhaps 0.005.

I would say wobble less than 0.002 you can ignore.

I've now been through this three times - I have never had to address the friction surface. But I have been required to address a crankshaft flange issue.

Joe K

Kurt in NJ · 01-26-2023, 05:50 PM

does it only happen when you are using the clutch— moving the pedal?
or does it happen after the foot is off the clutch and car is moving?

01-25-2023, 10:09 AM	#1
Antique_iron Junior Member Join Date: Apr 2022 Location: Upstate NY Posts: 8	Shuddering And Hammering When Using 1st And Reverse My original and unrestored 28 Tudor hammers and shudders when engaging the clutch at a standstill in 1st or reverse. I suspected an oil soaked clutch disc (not a muliti disc) due to a rear main leak but after pulling the engine and transmission that is not the case. What should I be looking for? A bad input shaft bearing perhaps? Thank you in advance...

01-25-2023, 10:25 AM	#2
Bob Bidonde Senior Member Join Date: May 2010 Location: Long Island, NY Posts: 3,466	Re: Shuddering And Hammering When Using 1st And Reverse It may be clutch chatter caused by misalignment, oil/grease contamination, a warped flywheel, damaged clutch disk or a warped / damaged pressure plate. It has been my experience that clutch chatter causes transmission oil to splatter into the bell housing and contaminate the clutch. Over-filling the transmission can cause this. __________________ Bob Bidonde Last edited by Bob Bidonde; 01-25-2023 at 10:35 AM.

01-25-2023, 11:06 AM	#3
Patrick L. Senior Member Join Date: May 2010 Location: Largo Florida Posts: 7,225	Re: Shuddering And Hammering When Using 1st And Reverse Sure sounds like clutch chatter. It's usually a warped/heat checked flywheel or mis adjusted pressure plate fingers. A bad disk or unsprung disk can contribute to it. Oil contamination will cause it, but, I've not found that to happen. I find this stuff easier to remove the transmission rather than the engine. Plus I can lay under there and take a nap.

01-25-2023, 01:27 PM	#4
Antique_iron Junior Member Join Date: Apr 2022 Location: Upstate NY Posts: 8	Re: Shuddering And Hammering When Using 1st And Reverse Does the surface on the flywheel where the pressure plate mounts get machined as well?

01-25-2023, 03:22 PM	#5
Kurt in NJ Senior Member Join Date: May 2010 Location: on the Littlefield Posts: 6,159	Re: Shuddering And Hammering When Using 1st And Reverse is it a multi disc clutch or was it updated to single disc

01-25-2023, 06:55 PM	#6
Antique_iron Junior Member Join Date: Apr 2022 Location: Upstate NY Posts: 8	Re: Shuddering And Hammering When Using 1st And Reverse Sponsored Links (Register now to hide all advertisements) It's a single disc set up.

01-25-2023, 07:28 PM	#7
1crosscut Senior Member Join Date: Feb 2011 Location: Lincoln, Nebraska Posts: 1,909	Re: Shuddering And Hammering When Using 1st And Reverse Had a friend have the same symptoms a few years ago with a newly rebuilt clutch. Finally found that the new clutch disk had a slightly raised area on one face about the diameter of a nickel. Had to look hard to find it. Changed out the disk and all was well. __________________ Dave / Lincoln Nebraska

01-26-2023, 02:32 PM	#8
Joe K Senior Member Join Date: Jul 2010 Location: Cow Hampshire Posts: 4,188	Re: Shuddering And Hammering When Using 1st And Reverse It is commonly done to "surface" the flywheel/clutch surface, but not always necessary. Even "cracks" are tolerable provided the surface is not "scored" more than perhaps 0.005. I would say wobble less than 0.002 you can ignore. I've now been through this three times - I have never had to address the friction surface. But I have been required to address a crankshaft flange issue. Joe K __________________ Shudda kept the horse.

01-26-2023, 05:50 PM	#9
Kurt in NJ Senior Member Join Date: May 2010 Location: on the Littlefield Posts: 6,159	Re: Shuddering And Hammering When Using 1st And Reverse does it only happen when you are using the clutch— moving the pedal? or does it happen after the foot is off the clutch and car is moving?