I think I found the problem but….

T

Tech_machine

Junior Member
I think I found the problem but….

Started the thread about the 1947mercury not moving.

I believe I have located the problem, I ordered the wrong clutch and it got installed 11” vs 10”. I need to remove the clutch, can the oil pan be dropped 1 1/2 or 2 inches so I can get at the bolts to remove the clutch. Prefer not to pull engine, but whatever will be will be. Transmission is out. Anyone ever done this? Thanks.
 
Re: I think I found the problem but….

The 10" pressure plate might not be a bolt up to your flywheel .If that is the case you need to remove the flywheel and have it redrilled for the 10" pressure plate.
 
Re: I think I found the problem but….

deuce lover said:
The 10" pressure plate might not be a bolt up to your flywheel .If that is the case you need to remove the flywheel and have it redrilled for the 10" pressure plate.
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So the flywheel would have been acquired to match the clutch in the engine rebuild? Correct? So the engine must come out then, probably.
 
Re: I think I found the problem but….

deuce lover said:
The 10" pressure plate might not be a bolt up to your flywheel .If that is the case you need to remove the flywheel and have it redrilled for the 10" pressure plate.
Click to expand...

You were correct, no holes for a 10” clutch. I just have to decide whether to have it drilled or buy another.

I was able to remove the clutch by loosening all pan bolts, removing starter, and loosening exhaust crossover pipe.
 
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Re: I think I found the problem but….

Why would an 11 inch clutch keep the vehicle from moving?
 
Re: I think I found the problem but….

Don't understand your problem a 10" or 11" to me should work, is your throw out bearing in the fork correctly and is the pin sheared. Can you shift the trans when car is running ?
 
Re: I think I found the problem but….

kurt v said:
Don't understand your problem a 10" or 11" to me should work, is your throw out bearing in the fork correctly and is the pin sheared. Can you shift the trans when car is running ?
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Well the difference in the thicknesses of the disc and plate, I am hoping is the problem. But I do have my fingers crossed.
 
Re: I think I found the problem but….

It is starting to sound like someone installed a real "hodge-podge" of parts in your vehicle. I would determine exactly what you have and exactly what you need before spending another dollar or turning another wrench.
 
Re: I think I found the problem but….

tubman said:
It is starting to sound like someone installed a real "hodge-podge" of parts in your vehicle. I would determine exactly what you have and exactly what you need before spending another dollar or turning another wrench.
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Well, I ordered the wrong clutch for the engine rebuilders. In my weak defense it was the correct year but for trucks. I just messed up, so it’s been mostly self inflicted errors and me being a uTube mechanic……my impatience in this project doesn’t serve me well. I appreciate your counsel though.
 
Re: I think I found the problem but….

In your other post, you said locked up driveshaft, one wheel does not turn the other. So you have multiple problems to work out? Can you update us on the differential problem? Broken axle or an unlikely stripped coupler?
 
Re: I think I found the problem but….

I maybe misstated but the driveshaft and rear axles seem to be working as they should. I have a 10” clutch coming Tuesday, pretty sure I will have to get new mounting holes machined, but I just want to be sure.
Working on this car is above my knowledge level, but ya do what ya gotta do. I am hoping the 3/4” difference in clutch thickness is the problem, we shall see.
 
Re: I think I found the problem but….

I doubt it is the difference in the thickness between the 10" and 11" clutch plates. It's a lot easier to remove the pressure plate and get a clutch plate to match it, than it is to remove the flywheel. I agree with the previous poster! We are not even sure you have isolated the problem?
Did you check the rear end before you removed the transmission again?
Car on the ground engine running, in 2nd or 3rd gear, clutch pedal out. Is the speedometer working or not?
 
Re: I think I found the problem but….

3/4" difference in thickness between a 10 and 11 inch clutch plate???
 
Re: I think I found the problem but….

69a said:
3/4" difference in thickness between a 10 and 11 inch clutch plate???
Click to expand...

If the specs I saw were correct, the disc for the 10” was 1/2” thinner than the 11” and the pressure plate is 1/4” thicker. I will know for sure Tuesday.
 
Re: I think I found the problem but….

Tech_machine said:
If the specs I saw were correct, the disc for the 10” was 1/2” thinner than the 11” and the pressure plate is 1/4” thicker. I will know for sure Tuesday.
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Stop buying parts right now, Wherever you saw those specs is suspect. There is no way a clutch disc for the same car can vary in thickness by 1/2". I think you may have read it wrong; an 11" disc is 1/2" larger (in diameter) than a 10". You really need to start over from scratch.
 
Re: I think I found the problem but….

Much of my Ford knowledge has been gained right here on the Barn, one gem of wisdom being that a pressure plate does not magically balance with a flywheel. The assembled combo must be balanced as a unit before installing on the engine. If I have my recollections mixed up, I'm confident that someone with the actual experience will call the error.
 
Re: I think I found the problem but….

tubman said:
Stop buying parts right now, Wherever you saw those specs is suspect. There is no way a clutch disc for the same car can vary in thickness by 1/2". I think you may have read it wrong; an 11" disc is 1/2" larger (in diameter) than a 10". You really need to start over from scratch.
Click to expand...

I get where you are coming from but until I have the correct clutch assembly, it is difficult to move on to figure out what is going on. I should never have ordered the clutch in the first place, did it as a favor to my rebuilders, now I get to fix it.

Before posting on this site, I read many threads trying to figure stuff out. You are one of the good guys on here whose posts I don’t ignore, much respect sir.
I appreciate all the feedback, and am here because I am not a wrench and need advice at times. Thanks for the help.
 
Re: I think I found the problem but….

First of all, do you have the correct flywheel? I have reviewed this thread, and have come to the conclusion that the flywheel you have was drilled only for an 11" clutch. I am an "8BA guy", and will admit that my knowledge of the earlier cars is not what it should be, but I don't think a '47 Mercury ever came with an 11" clutch. If I'm right about this, you have the wrong flywheel and should start there. Re-drilling it to accept a 10" pressure plate is probably not a solution.
 
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Re: I think I found the problem but….

I've been following this post from the start and I still haven't heard a thing that sounds like it is or was the cause. From the start , the wheels turn when off the ground ,engine running in gear. But the car wont move when its on the ground. We have not heard of any bad noises coming from the drivetrain. broken driveshats, rear ends or axles tend to make at least some bad noise. If the OP had an 11"clutch that cleared the bellhousing you would think it would be fine. My first thought given the symtomsand lack of noise woud be a clutch that was not fully ingaging . Reasons for that could be , not adjusted right, wrong throwout bearing, the adjustng bolts on the clutch fingers are out too far (if it has them,some dont), or the bearing is not sliding smoothly or far enough on the nose cone. I agree that not a dime should be spent until we have an AH HA moment. Tim
 
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