Clutch fork?
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Tuned
Joined: Feb 2003
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From: Oregon
Clutch fork?
The throwout bearing in my '76 F250 sounds like a marble caught in a garbage disposal. It's dead silent when my foot is resting on the pedal or when the clutch is depressed, but starts rattling as soon as the tension is taken off of it. I'm getting really tired of listening to it. The pedal has just the right amount of freeplay, so I don't want to take up any more slack.
Are there supposed to be any inserts or insulators on the fork? In other rigs I've had in the past, the clutch fork has had little nylon or plastic inserts on the fork to keep it tight in the bearing channel and reduce the noise. I haven't looked on mine yet, but it wouldn't surprise if they were missing, and I'd hate to pull the tranny and replace the bearing and have the same problem.
Are there supposed to be any inserts or insulators on the fork? In other rigs I've had in the past, the clutch fork has had little nylon or plastic inserts on the fork to keep it tight in the bearing channel and reduce the noise. I haven't looked on mine yet, but it wouldn't surprise if they were missing, and I'd hate to pull the tranny and replace the bearing and have the same problem.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
Originally Posted by 1pump
Are there supposed to be any inserts or insulators on the fork? In other rigs I've had in the past, the clutch fork has had little nylon or plastic inserts on the fork to keep it tight in the bearing channel and reduce the noise. I haven't looked on mine yet, but it wouldn't surprise if they were missing, and I'd hate to pull the tranny and replace the bearing and have the same problem.
They aren't missing because they weren't there in the first place. The same fork was used from 1970 thru 1976: D0TZ-7515-A. No inserts are listed.
If you have noise coming from that area, it's prolly a bad throwout bearing/pilot bearing. The parts need to be replaced sooner or later. The noise isn't caused by the clutch fork.
You might luck out...some of those throwout bearings came with a Zerk (lube) fitting originally. If so, get out the grease gun and lube that bearing.
Before tearing into the clutch, take a look at the clutch equalizer (Z) bar. The bar rides on two ball studs, one on the frame and one on the transmission. There are two plastic bushings, felt washers and clips. The bushings crack, fall apart and when that happens the vibration radiates thru the entire system. Also look closely at the clutch rod that feeds from the pedal to the equalizer, two more plastic bushings there, and when they go bad, the 90 degree ends of the rod bend, and eventually snap off.
Last edited by NumberDummy; Dec 13, 2007 at 03:39 AM.
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Tuned
Joined: Feb 2003
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From: Oregon
Thanks, NumberD. I'll take a squint at those bushings. The inspection cover is also missing from the bottom of the bell housing, so the bearing might have had some water intrusion.
Every rubber part on this truck is shot, so it wouldn't surprise me that the plastic parts are, too. It has about 438 nickle and dime issues to fix, so I'm doing the ones that annoy me the most. The throwout bearing is right up there on the list. I don't mind pulling the tranny if I have to, I just wanna make sure I'm not missing something easy first.
Every rubber part on this truck is shot, so it wouldn't surprise me that the plastic parts are, too. It has about 438 nickle and dime issues to fix, so I'm doing the ones that annoy me the most. The throwout bearing is right up there on the list. I don't mind pulling the tranny if I have to, I just wanna make sure I'm not missing something easy first.
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