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| | | | Joined: Oct 2015 Posts: 406 'Bolter | | 'Bolter Joined: Oct 2015 Posts: 406 | I installed a rebuilt 261 2 years ago and have since had an issue with the clutch . I used the same flywheel which I had machined flat , 11 in. clutch disk and pressure
plate off the original 235 which never had any issues . But since the transplant whenever I depress the clutch to its full extent it lack of a better term it chatters and rumbles , but only when totally depressed . I've replaced the throw out bearing twice and noticed that the tips of the fingers on the diaphragm are a bit warn as the paint is missing .
BUT upon checking the pilot bushing with a spare input shaft that's around 6 in. long the shaft will wobble side to side about 2 inches .
I then removed the pilot bushing and upon inspection it seems the center hole is oval . I have since replaced the bushing and the shaft is now tighter .
Could the pilot bushing have been the cause or should I look elsewhere ??? I'm guessing the bushing was not replaced when the engine was rebuilt .
John
good planning is no substitute for dumb luck
| | | | | Joined: Mar 2014 Posts: 4,477 Moderator, Electrical Bay | | Moderator, Electrical Bay Joined: Mar 2014 Posts: 4,477 | A worn out pilot bushing can cause all sorts of problems...including the ones you mentioned. When the clutch is disengaged completely, the input shaft of the transmission can sort of wobble and "walk" around there and make a racket. Especially if your bushing has worn to an oval shape. And it is worse during a full moon.
~ Jon
1952 1/2 ton with 1959 235 | T5 with 3.07 rear end
| | | | | Joined: Feb 2004 Posts: 29,746 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,746 | Nothing good can come of a sloppy pilot bushing, but I haven't seen that happen. Maybe the clutch disc is getting cocked as the pedal is depressed, allowing the back side of the diaphragm fingers contact the spring hub.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Mar 2014 Posts: 4,477 Moderator, Electrical Bay | | Moderator, Electrical Bay Joined: Mar 2014 Posts: 4,477 | I always figured it was because when the pressure plate was completely disengaged, the disc at that point being free moved and rattled around in there also and shook the input shaft around as it did. Nothing to hold the tip of the input shaft and some of them have a notable amount of play.
~ Jon
1952 1/2 ton with 1959 235 | T5 with 3.07 rear end
| | | | | Joined: Oct 2015 Posts: 406 'Bolter | | 'Bolter Joined: Oct 2015 Posts: 406 | well then , I'll put it back together on the weekend and see what rattles
Thanks for the input .
John
good planning is no substitute for dumb luck
| | | | | Joined: Oct 2015 Posts: 406 'Bolter | | 'Bolter Joined: Oct 2015 Posts: 406 | Well , finally got the tranny back in with a new pilot bushing , all else remained the same .
The noise seems to have gone , although I haven't taken in on the road yet .but I didn't have to leave the garage to notice the problem in the past .
Here's hoping .
John
good planning is no substitute for dumb luck
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