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1987 Ford f150 slave clutch problem
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Loren Champlain Sr
Veteran
/ Moderator
Nov 21, 2008, 3:57 PM
Post #26 of 33
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Re: 1987 Ford f150 slave clutch problem
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I guess I'm not clear on what the problem was, originally. If I understand correctly; If you start the engine, push in the clutch, you can get it into gear, but the truck won't move unless you rev the engine? Is this correct? If so, the problem is in the clutch, itself. Could be a disc or pressure plate problem.
On the other hand, with the engine running, push in the clutch, and can't get it into gear without grinding, then it is a clutch release problem. If this is correct, have someone push in the clutch pedal while you are watching the slave cylinder. You should be able to watch the piston push out against the throw-out fork. If this is happening, then you still may have a disc problem. Could be that one of the springs in the disc have fallen out and wedged between the pressure plate and the disc, disallowing enough throw. Try and be as specific as you can when answering. Thanks.
Loren
SW Washington
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Nov 21, 2008, 4:33 PM
Post #27 of 33
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Re: 1987 Ford f150 slave clutch problem
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Just like a brake the air must be known bled out or just full at master cylinder means little. There could be other issues that disable it from disengaging clutch to shift and drive as normal. There's whatever the slave mounts to, a pushrod there to a fork that pushes on the throwout bearing that releases the pre-tensioned pressure plate which is doing the real grabbing force if and only if clutch is good enough to have any friction.
You should be able to see something move down at slave cylinder with a helper pushing on clutch pedal. Some are out of sight and I can't recall this one in particular,
T
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gdtractor
User
Nov 21, 2008, 6:54 PM
Post #28 of 33
(2295 views)
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Re: 1987 Ford f150 slave clutch problem
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Tom and Loren ..
again .. I hate to "carry on" about this .. but as you mentioned I need a "helper" to push the clutch and me to watch ..
and YES the other day when I pushed in the clutch -- the truck would move when I reved the engine ..
now -- when I push the clutch -- it goes in all the gears easily -- but it doesn't seem like anything is happening at all .... goes into gear but no rubbing sound - NODA !! that is what has got me wondering ..
I will -- before I write again .. get someone to help me and watch the bottom to see what is going on with the lever .. etc ..
Thanks again ..
Gary
(This post was edited by gdtractor on Nov 21, 2008, 7:03 PM)
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Loren Champlain Sr
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/ Moderator
Nov 22, 2008, 11:40 AM
Post #29 of 33
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Re: 1987 Ford f150 slave clutch problem
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Gary; Just went back are re-read the posts; Like Tom said, sounds like a lack of clutch engagement. If you can let out the clutch pedal, with the engine running, and the transmission in gear, and the truck wants to move but won't....(If this is not the scenario, let me know):
I'm going to try and cover the bases, here, so bare with me.
1) The hydraulic system (master cyl. and slave cyl) operate the throw-out fork which, in turn, presses on the throw-out bearing to release the clutch. No real difference than the old type that used linkage. The reason for the hydraulics is that it requires less foot/leg pressure to operate the clutch. Sooooooo, if this is what is happening, I would have to say that it is a mechanical problem in the clutch, itself. Not a hydraulic issue.
2) When the throw-out fork pushes the throw-out bearing, the bearing then presses against the 'fingers' on the pressure plate, disengaging it from the clutch disc. There are only a couple of scenarios that I can bring to mind. First, being the clutch disc is just plain worn out; Or, something like a piece of 'something' has fallen into the area behind the 'fingers' of the pressure plate keeping it from locking up with the disc. Either way, trans removal will be required.
With that said; If you start the engine, push in the clutch pedal, and can't get it into first or reverse without grinding...Still could be a hydraulic or debris problem assuming that you welded the pedal assembly in the correct position.
Loren
SW Washington
(This post was edited by landdchamploren on Nov 22, 2008, 12:10 PM)
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gdtractor
User
Nov 22, 2008, 3:45 PM
Post #30 of 33
(2271 views)
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Re: 1987 Ford f150 slave clutch problem
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.. that's pretty much the scenario -- only thing is now I can put it in gear ... and with the engine running without my foot on the clutch .. I can easily shift to any gear including reverse .. NOTHING .... no grinding -- no movement .. nothing ..
Gary
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Loren Champlain Sr
Veteran
/ Moderator
Nov 22, 2008, 5:40 PM
Post #31 of 33
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Re: 1987 Ford f150 slave clutch problem
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Well, Gary, it's time to drop the trans. Sorry. It's a little more work, but makes the job much easier if you drop the transfer case seperately. Both the transfer case and the transmission are quite heavy. If you have a floor jack, you can use it to lower each piece, the use it to raise the pieces during reinstallation. I think you'll find the clutch disc grenaded. Be sure to have the flywheel resurfaced and replace the slave while you've got it torn down. Pretty easy one day job in your driveway. If you need any instructions during the process, feel free to ask.
Loren
SW Washington
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gdtractor
User
Nov 22, 2008, 8:32 PM
Post #32 of 33
(2261 views)
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Re: 1987 Ford f150 slave clutch problem
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thanks Loren .. !!
going to have to "getter done" ....
thanks again you guys -- for your help ..
GED
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txcwright
New User
Nov 29, 2008, 5:38 PM
Post #33 of 33
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Re: 1987 Ford f150 slave clutch problem
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I have the exact same problem with my '88. I have the clutch kit (clutch, pressure plate, throwout bearing, pilot bearing and pilot tool). I started removing the transmission today, but I can't figure out how to disconnect the hydraulic line that connects to the slave cylinder from the side of the transmission. Anyone know how to do this? Or, is there a way to remove the transmission without disconnecting the hydraulic line? I have changed F100/F150 clutches in the past, but all had mechanical linkages. Any help with this would be appreciated.
(This post was edited by txcwright on Nov 29, 2008, 5:40 PM)
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