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Old 02-08-2016, 10:06 PM   #1
fftoddster
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Default clutch not disengaging

37 21 stud eng. t5 trans with cornhusker kit with ford type cross shaft. Drake 39 pedal assy.

Clutch does not appear do be disengaging.
Things feel correct... small amount of free play and then feel the pressure when pushing down on pedal. When pedal is released can feel the clutch plate push the pedal back up. Measured the travel on the external cross shaft lever and it is 1" then pedal arm travel bottoms out in the little notch in the frame.

What is weird is before driveline was put in I had the yoke in trans and started eng and was able to shift through all the gears. Now when I try I cant shift because the gears are spinning.

Any ideas?
I'm really not looking forward to pulling it apart again.
Unfortunately there is no inspection access with this set up.
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Old 02-08-2016, 10:26 PM   #2
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Default Re: clutch not disengaging

Clutch disc stuck to flywheel and pressure plate?. Was it sitting idle for an extended period of time?....
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Old 02-08-2016, 10:36 PM   #3
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Default Re: clutch not disengaging

No. It was just recently put together. New clutch disc, throwout bearings... from cornhusker. Reused stock pressure plate and flywheel per cornhusker advice.
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Old 02-08-2016, 10:39 PM   #4
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Default Re: clutch not disengaging

Have you called Cornhuskers about this? I have found them very helpful in the past. Have you tried starting the engine with the transmission in gear and the clutch pedal push down? If it is just mildly hung-up That should free it up (be sure to securely block the wheels!). Could also try pushing the car back and forth with the transmission in gear (and clutch pedal pushed down).

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Old 02-08-2016, 10:51 PM   #5
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Default Re: clutch not disengaging

Planning on calling them tomorrow. Just getting it all together today. I put rear end up in air, jackstands under axle and started it in gear with clutch pushed in. Wheels turned. Eng died when applied brakes.
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Old 02-08-2016, 11:06 PM   #6
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Default Re: clutch not disengaging

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Could it be that the disk material is way to thick to be
compatible with your pressure plate









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Old 02-08-2016, 11:22 PM   #7
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Default Re: clutch not disengaging

Quote:
Originally Posted by fftoddster View Post
Planning on calling them tomorrow. Just getting it all together today. I put rear end up in air, jackstands under axle and started it in gear with clutch pushed in. Wheels turned. Eng died when applied brakes.
Sure sounds like something is hung up!
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Old 02-09-2016, 06:50 AM   #8
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Default Re: clutch not disengaging

Sounds like the clutch disc is hanging up to me. Wonder if it is hanging up on the flywheel bolts - potentially in backwards, too thick, ???
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Old 02-09-2016, 08:05 AM   #9
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Default Re: clutch not disengaging

What pressure plate are you using. Is it a Long style?
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Old 02-09-2016, 08:21 AM   #10
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Default Re: clutch not disengaging

Quote:
Originally Posted by Lanny View Post
Could it be that the disk material is way to thick to be
compatible with your pressure plate
.
That would do it. I was there once with an old Studebaker. But, it worked without the drive shaft.

I under stand not wanting to take it apart. Double check pedal linkage slop.

Maybe with car off the ground start to loosen up the anchor points of the drive line.

Cornhusker probably will have input.
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Old 02-09-2016, 01:02 PM   #11
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Default Re: clutch not disengaging

Have not gotten thru with Gary at Cornhusker yet but I have a sinking feeling it may be the clutch disc hub up against the pilot bearing.

I will wait to hear from Gary but my guess is, I will end up pulling eng since it has a rear main leak, welch plug leak, and water pumps need rebuilding. What sheet metal needs to be removed to pull eng out of a sedan?
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Old 02-09-2016, 08:05 PM   #12
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Default Re: clutch not disengaging

Well just talked to Cornhuskers... he is suggesting to try the original ford arm on the cross shaft linkage.
He said that it should not be a disc issue using the one I got from him, he has had no issues with those.
So I guess I will try that arm first when I get a chance to work on it again.

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Old 02-09-2016, 09:21 PM   #13
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Default Re: clutch not disengaging

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Originally Posted by fftoddster View Post
Well just talked to Cornhuskers... he is suggesting to try the original ford arm on the cross shaft linkage.
He said that it should not be a disc issue using the one I got from him, he has had no issues with those.
So I guess I will try that arm first when I get a chance to work on it again.
Lots of choices available. It's easy to see that if you used one that is too LONG, it may not afford enough rotation at the shaft to disengage the clutch. DD

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Old 02-09-2016, 09:31 PM   #14
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Default Re: clutch not disengaging

Well the original arm and aftermarket are both the same length center to center.

I put a length of pipe on the arm and rotated the it as far as it would go (as if applying the clutch) and had my son try to turn the driveshaft (rear wheels in air brakes off) it would not turn.

So I am pretty much ruling out external problems such as arm and linkage.
It has to be something inside.
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Old 02-09-2016, 09:56 PM   #15
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Default Re: clutch not disengaging

What is the free play measurement?
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Old 02-09-2016, 10:13 PM   #16
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Default Re: clutch not disengaging

tried free play from 1" pedal movement down to practically nothing= no change.

Disconnected linkage all together and manually rotated linkage arm (attached to throw out fork ) as far as it would go clutch still did not disengage.
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Old 02-09-2016, 10:16 PM   #17
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Default Re: clutch not disengaging

Quote:
Originally Posted by fftoddster View Post
Well the original arm and aftermarket are both the same length center to center.

I put a length of pipe on the arm and rotated the it as far as it would go (as if applying the clutch) and had my son try to turn the driveshaft (rear wheels in air brakes off) it would not turn.

So I am pretty much ruling out external problems such as arm and linkage.
It has to be something inside.
I would first put in neutral and see if drive shaft will turn then try the pipe again and see if it turns now. You may be turning the spiders gears.
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Old 02-09-2016, 11:47 PM   #18
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Default Re: clutch not disengaging

The drive shaft does turn in neutral, but will not in gear with clutch fully depressed
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Old 02-09-2016, 11:53 PM   #19
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Default Re: clutch not disengaging

Pilot bearing stub on input shaft bottoming on crankshaft...OR did you install wrong diameter clutch disk?
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Old 02-10-2016, 12:50 AM   #20
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Default Re: clutch not disengaging

Quote:
Originally Posted by jetmek View Post
Pilot bearing stub on input shaft bottoming on crankshaft...OR did you install wrong diameter clutch disk?
Clutch disc supplied by cornhusker... so doubt its wrong

Input shaft bottoming out? maybe if I loosen trans bolts to bell housing and slightly move trans backward? Maybe I will try that this weekend.
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