1985 Ford F-150 clutch wont disengage

Tiny
AJTHUNDER21
  • MEMBER
  • 1985 FORD F-150
  • 6 CYL
  • 2WD
  • MANUAL
  • 300,000 MILES
Ok the clutch plate wore out so I decided to replace the clutch plate and pressue plate plus the two bearings when I droped the tranny I saw that there was only 3 scews holdind the pressure plate on the rest looked like they were over tightend and shered off with in impact so I removed the whole assembly then put in some new screws(now the old ones threaded 3/4 the way up the screw the new ones are treaded the whole way this is all that is differant)when I put the whole thing back together I canot get the cluch to disengage I then blead the line (didnt work)replaced the slave cylender (didnt work)and finally the master cylenderand it still wont work. So far I have droped and reinstalled this tranny 6 times. Any ideas?
Monday, August 30th, 2010 AT 2:26 AM

9 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
What screws don't go the entire way in? Are they the ones holding the flywheel in place? They should all be flush with the plate it that is the case.

Let me know.
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Monday, August 30th, 2010 AT 8:02 PM
Tiny
AJTHUNDER21
  • MEMBER
  • 4 POSTS
Its the scews for the pressure plate there 1 inch in length but they are only threaded 5/8 up the screw leaving a 5/16 smooth surface before the hex head the new ones I have are the same length but they are threaded to the head of the bolt and when I scewed in the new ones all the way in the the clutch didnt not disengage
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Tuesday, August 31st, 2010 AT 9:13 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
Honestly, they all should be tight against the pressure plate. However, if they are loose, I would think they would cause the clutch to not engauge not the opposite.

Have you tried replacing all of them?
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Wednesday, September 1st, 2010 AT 10:39 AM
Tiny
AJTHUNDER21
  • MEMBER
  • 4 POSTS
Yes I have and I agree
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Wednesday, September 1st, 2010 AT 12:39 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
I looked things up and everything shows them tight.
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Wednesday, September 1st, 2010 AT 1:18 PM
Tiny
AJTHUNDER21
  • MEMBER
  • 4 POSTS
Is there any thing else that would cause the clutch to not disengage
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Thursday, September 2nd, 2010 AT 2:14 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
The only thing I can think of is if the clutch was put together incorrectly. The pressure plate would have to have pressure on it at all times.
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Thursday, September 2nd, 2010 AT 7:20 AM
Tiny
AJTHUNDER21
  • MEMBER
  • 4 POSTS
Ok the isse was that the tranny was off of a 89 f250 so the pressure plate s springs did not stick out far enough
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Saturday, September 4th, 2010 AT 10:08 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
That will do it.
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Monday, September 6th, 2010 AT 12:11 AM

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