North American Turbocoupe Organization



Don't think it is the quadrant after all
Burt Offline
Junior Member
#1
Hi All,

I just spent a bit of time with the 'Bird. I don't think it is the quadrant. The clutch disengages about 1 1/2 to two inches from the floor. It is fully disengaged at that point. As things heat up, the drag on the transmission increases until it will not shift into gear from neutral, even though i can feel the disengagement point.

Seems like either the throwout bearing or pilot bearing is bad/going bad, and putting a drag on the input shaft of the tranny. Guess I get to drop the trans and replace one or both of those. Might just replace a clutch since it will be out.

Sheesh, with Christmas here, the timing could have been better.
Burt
1986 TC, 202K, stock
5th Turbo owned
Others were an 85 TC, and three XR4Ti's (glutton for whining)
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Pete D Offline
Administrator
#2
TC repair timing is never good. Took one to get Echecked yesterday and left it running with the cooling fan running also (manual switch option)
It passed but when I climbed in to leave, the temp gauge read 230* and rising as I drove. Duh. Checked coolant level - OK Checked fan operation - what fan operation???? OOPpps. Turn heater on full bore and get it home. More fun and games

Have you checked the lube level in the trans? Long shot, I know but............??
Pete Dunham


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Burt Offline
Junior Member
#3
Have not checked the fluid level. Didn't think that would cause this issue, but will go jack it up and check. Also talked to a mechanic friend who does not think it is either the throwout bearing or pilot bushing. He says I would hear lots of noise if it were either of those. He suggested taking the cable loose at both ends and checking it for binding/breakage.

Also got to wondering if maybe the left-over adjustment in the adjuster is unable to adjust/hold? Looking under the dash, there is a white plastic rod with a rectangular piece on it. There is about half an inch of rod exposed. If I can't get the replacement, I am faced with the mustang cable option.

You use the manual switch also? LOL, about 4 years ago, I got the dual fans from an 88 and retrofitted them to the 86. Lower fan goes to the AC clutch, upper is on a switched relay. What a difference.
Burt
1986 TC, 202K, stock
5th Turbo owned
Others were an 85 TC, and three XR4Ti's (glutton for whining)
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Pete D Offline
Administrator
#4
I got mine set up for manual as well as EEC control but something died Big Grin It's a single fan aftermarket set up.
Pete Dunham


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83zombi Offline
Senior Member
#5
If you are guessing throw out bearing or pilot bearing you should also guess bearing retainer. A common problem is the steel throw out bearing wears a groove in the alum bearing retainer causing a chain reaction of problems. A bearing retainer with a steel tube, instead of OEM alum, can be had from several sources as a 5.0 V8 retainer. It's a 'must do' if you tear into the clutch assembly.
83 dead bird, in pieces however I'm reading from the book of the dead, should be running soon.
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Burt Offline
Junior Member
#6
Thank for the info. I will have it in the garage Saturday, and try to get it apart and checked out. Will report back what I find.
Burt
1986 TC, 202K, stock
5th Turbo owned
Others were an 85 TC, and three XR4Ti's (glutton for whining)
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Burt Offline
Junior Member
#7
Well, I was right, it wasn't the quadrant. Dropped the trans Saturday, pulled everything out and lo and behold, found small steel pieces in the pilot bearing place, where there should have been a pilot bearing. The race was ground to nothing, most of the needles were in the recess in the back of the crank, and a lot of ground up dusty stuff. Cleaned it all out, checked everything over and pulled the pilot bearing case.

The flywheel still has marks from when it was previously ground, with no ridge or other grooves. You can see where the friction plate was running, but nothing worn down at all. Clutch was marked "Ford" so the PO had to have taken it to a dealer for clutch work. Either that of the clutch has 190K on it, so figure the odds. It has almost as much material as the new replacement, so the clutch was still useable. Throwout bearing was a little loose, easy to spin and sounded dry, so apparently the clutch was replaced in the past without the two bearings. T/O fork is worn, but not excessively, nor was the pivot ball worn badly.

Clutch installed said Valeo and was slightly smaller than the pressure plate, but the same size as the previous friction plate. Looks like the kit I got from advance (Zoom, I remember them from my hot rod days in the 70's and 80's) could take a 9 1/4" disk. New pilot bearing, new throwout bearing. Had to swap the T/O bearing at Advance, since the one in the kit was smaller than the one that came out, and would not go over the front bearing retainer. Yes, mine seems to be aluminum, but was not gouged or otherwise damaged.

Peddle effort is about half what it was previously, and it was not hard before. I think I caught it early, or there could have been some pretty serious damage done.
Burt
1986 TC, 202K, stock
5th Turbo owned
Others were an 85 TC, and three XR4Ti's (glutton for whining)
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Pete D Offline
Administrator
#8
Glad to hear you found the problem.
Pete Dunham


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