Join Date: Nov 2009
Location: Whitehall MT
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new clutch, terrible squeal
A few weeks back when I had the engine out for a major overhaul I replaced the clutch with a southbend 1944-6O clutch, kevlar pilot bushing, and new throwout bearing. I already had a solid Valeo flywheel on the truck, it was in good condition and measured fine so I re-used it. When I got the engine running again I could not get the clutch to disengage and after the engine had idled for a couple minutes there was a terrible squealing sound from the bellhousing area. I immediately shut the truck off and commenced to changing back to the old valeo clutch to get me back on the road.
With the old clutch back in with the new kevlar pilot bushing and throwout bearing, everything worked just fine for a couple weeks. Then while driving down the interstate an o-ring blew in the high pressure oil system, there wasn't any indication that anything was wrong it just filled the engine valley with oil which ran down the back of the block and oiled the clutch up nicely. Then the clutch started slipping pretty bad and the truck ran low on oil and shut-off (this only took about 15 miles on the interstate).
So here I am with the new southbend clutch back in after calling them about not being able to get it to disengage, they suggested it was the clutch slave cylinder and that the clutch should work with the valeo flywheel. After some bleeding and a slight adjustment modification to the slave cylinder it now disengages just fine. However I still get a terrible squealing sound that sort-of comes and goes, it happens just idling in neutral and depressing the pedal or engaging the clutch does not always affect it. Sometimes it goes away in gear under load.
Things I am ruling out are the pilot bushing and throwout bearing because they both worked just fine with the old clutch re-installed. Also I have removed the slave cylinder and pulled the throwout arm back to make sure the throwout bearing was not in contact with the clutch fingers and the squeal continued.
Any ideas? I have heard the input bearing might make that sound but it is intermittent and didn't do it at all with the old clutch installed, just the two times I've had the southbend clutch in. Also I can kind of feel the squeal through the shifter when it is squealing and I start to put it in gear.
Sorry for the long post, just trying to get all the information out there.
'02 F350 Lariat, CC Long box, 4wd, 6spd
6637 intake, 4" exhaust
GTP38R, comp 910 springs, ARP head studs
welded piston oil jets, homemade bellowed up-pipes
F6 DP tuner
rear airbags w/ on board compressor