Grinding noise in bellhousing ): - The 1947 - Present Chevrolet & GMC Truck Message Board Network

77chevyinline6 · 06-25-2013, 09:38 PM

in my bellhousing of my saginaw 3speed when i let the clutch out it makes this grinding/rubbing noise/ the truck will jerk if you try to move it. i have the transmission yet just not the bellhousing because those bolts are soo tight and hard to get to but i will get that off tmw im just curious of whats going on I MISS MY TRUCK!

INSIDIOUS '86 · 06-25-2013, 09:57 PM

Possible your clutch is just that worn that the rivets are grinding the flywheel.
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77chevyinline6 · 06-25-2013, 11:05 PM

sorry but i forgot to add i just put a clutch in when i did the engine swap

INSIDIOUS '86 · 06-26-2013, 02:59 AM

Did you do a new pilot bushing as well? What about the pressure plate? What all is new And used underneath?
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geezer#99 · 06-26-2013, 09:45 AM

Did you put your disc in backwards?

77chevyinline6 · 06-26-2013, 02:34 PM

i did not put in a new pilot bushing but my clutch is installed correctly ive been driving the truck everyday until now

INSIDIOUS '86 · 06-26-2013, 02:38 PM

Could possibly be clutch chatter if the pilot is worn. If you replace it find an oilite type bushing
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77chevyinline6 · 06-26-2013, 02:42 PM

i also forgot to add with the clutch out at idle you can look at the clutch fork and it vibrates very bad and so does the clutch pedal

mrolds88 · 06-26-2013, 06:49 PM

Here's a couple of thoughts. First about the pilot bushing. You can buy an actual bearing for this application. GM used them in the early diesel trucks. Second, with your noise problem. Two thoughts, first is your throwout bearing may have crapped out. Second would be that some of the clutch cover bolts may be coming loose.

77chevyinline6 · 06-26-2013, 07:32 PM

the throwout bearing seemed fine but when i took the transmision out the throwout bearing just kind of fell out..

INSIDIOUS '86 · 06-26-2013, 08:24 PM

The throw out bearing should stay on the clutch fork unless it pulled out when you pulled the trans. You have the fork clips in the inside if the groove of the throw out bearing?
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INSIDIOUS '86 · 06-26-2013, 08:38 PM

Quote:

Originally Posted by mrolds88

Here's a couple of thoughts. First about the pilot bushing. You can buy an actual bearing for this application. GM used them in the early diesel trucks. Second, with your noise problem. Two thoughts, first is your throwout bearing may have crapped out. Second would be that some of the clutch cover bolts may be coming loose.

Wouldn't suggest a bearing. Those are known to fall apart and chew up the input shaft and the input bearing gets beat as well. A good bushing has done the job since the early days.
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77chevyinline6 · 06-27-2013, 02:16 PM

i had a "mechanic" install the the throwout bearing i really dont know how he had it

INSIDIOUS '86 · 06-27-2013, 04:18 PM

Ok well take it all apart and we can guide you in getting her done and back on the road. Worst we can do is fix it right?
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mrolds88 · 06-27-2013, 05:01 PM

Quote:

Originally Posted by INSIDIOUS '86

Wouldn't suggest a bearing. Those are known to fall apart and chew up the input shaft and the input bearing gets beat as well. A good bushing has done the job since the early days.
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I agree with your thoughts on a bushing. I hadn't heard of the bearings giving problems though. Anyway lets get this truck fixed!!!!

77chevyinline6 · 06-27-2013, 10:53 PM

well guys a bit of and update but first of all i wanted to say thanks, but i got the bellhousing off and there was metal shavings in it! it was getting dark so i quit for the night but i will be back at it soon!

INSIDIOUS '86 · 06-28-2013, 12:14 AM

Quote:

Originally Posted by 77chevyinline6

well guys a bit of and update but first of all i wanted to say thanks, but i got the bellhousing off and there was metal shavings in it! it was getting dark so i quit for the night but i will be back at it soon!

Well not a good start but let's hope it's nothing Superbad.
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mrolds88 · 06-30-2013, 01:18 PM

Any updates???

77chevyinline6 · 07-14-2013, 11:40 PM

well guys, i started the truck without the traqnsmission hooked up and it sounded beautiful, took the pan off the transmission and found chunks of metal and steel balls. lol. good thing i found 2 700r4s for 100$ sorry it took me so long to update

INSIDIOUS '86 · 07-14-2013, 11:42 PM

So an input bearing or throwout bearing failure I presume?
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77chevyinline6 · 07-14-2013, 11:59 PM

throwout bearing was fine, so i guess it was the input. i dont know much about transmissions this was my first truck and my first engine swap/rebuild and so on, but heres the pieces we found

INSIDIOUS '86 · 07-15-2013, 12:33 AM

Yup internal bearing. Saginaw trans right? Those aren't to hard to find
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77chevyinline6 · 07-15-2013, 12:38 AM

yeah, its a saginaw. this is the 2nd one that has been destroyed in my truck. Having a heavy foot doesnt help though

MalibuSSwagon · 07-15-2013, 01:00 AM

Yup late saginaws are pretty weak. Time to upgrade.

77chevyinline6 · 07-15-2013, 01:02 AM

yeah, it was fine when i had my 250l6 in there and now with a mildly built 350 it didnt even last 2 weeks

06-25-2013, 09:38 PM	#1
77chevyinline6 Registered User Join Date: Dec 2011 Location: mount airy NC Posts: 308	Grinding noise in bellhousing ): in my bellhousing of my saginaw 3speed when i let the clutch out it makes this grinding/rubbing noise/ the truck will jerk if you try to move it. i have the transmission yet just not the bellhousing because those bolts are soo tight and hard to get to but i will get that off tmw im just curious of whats going on I MISS MY TRUCK! __________________ 77 c10 (went from a inline 6 to 350) (converted to 3 speed in the floor) 350: mild cam, holley 600cfm 4bbl, summit stage 1 intake, accel billet distributer, flowtech headers, 2 1/4" exhaust with glasspacks, powermaster 160a alternator.

06-25-2013, 09:57 PM	#2
INSIDIOUS '86 Registered User Join Date: Jul 2009 Location: washington Posts: 4,178	Re: Grinding noise in bellhousing ): Possible your clutch is just that worn that the rivets are grinding the flywheel. Posted via Mobile Device __________________ 377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511

06-25-2013, 11:05 PM	#3
77chevyinline6 Registered User Join Date: Dec 2011 Location: mount airy NC Posts: 308	Re: Grinding noise in bellhousing ): sorry but i forgot to add i just put a clutch in when i did the engine swap __________________ 77 c10 (went from a inline 6 to 350) (converted to 3 speed in the floor) 350: mild cam, holley 600cfm 4bbl, summit stage 1 intake, accel billet distributer, flowtech headers, 2 1/4" exhaust with glasspacks, powermaster 160a alternator.

06-26-2013, 02:59 AM	#4
INSIDIOUS '86 Registered User Join Date: Jul 2009 Location: washington Posts: 4,178	Re: Grinding noise in bellhousing ): Did you do a new pilot bushing as well? What about the pressure plate? What all is new And used underneath? Posted via Mobile Device __________________ 377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511

06-26-2013, 09:45 AM	#5
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,736	Re: Grinding noise in bellhousing ): Did you put your disc in backwards?

06-26-2013, 02:34 PM	#6
77chevyinline6 Registered User Join Date: Dec 2011 Location: mount airy NC Posts: 308	Re: Grinding noise in bellhousing ): i did not put in a new pilot bushing but my clutch is installed correctly ive been driving the truck everyday until now __________________ 77 c10 (went from a inline 6 to 350) (converted to 3 speed in the floor) 350: mild cam, holley 600cfm 4bbl, summit stage 1 intake, accel billet distributer, flowtech headers, 2 1/4" exhaust with glasspacks, powermaster 160a alternator.

06-26-2013, 02:38 PM	#7
INSIDIOUS '86 Registered User Join Date: Jul 2009 Location: washington Posts: 4,178	Re: Grinding noise in bellhousing ): Could possibly be clutch chatter if the pilot is worn. If you replace it find an oilite type bushing Posted via Mobile Device __________________ 377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511

06-26-2013, 02:42 PM	#8
77chevyinline6 Registered User Join Date: Dec 2011 Location: mount airy NC Posts: 308	Re: Grinding noise in bellhousing ): i also forgot to add with the clutch out at idle you can look at the clutch fork and it vibrates very bad and so does the clutch pedal __________________ 77 c10 (went from a inline 6 to 350) (converted to 3 speed in the floor) 350: mild cam, holley 600cfm 4bbl, summit stage 1 intake, accel billet distributer, flowtech headers, 2 1/4" exhaust with glasspacks, powermaster 160a alternator.

06-26-2013, 06:49 PM	#9
mrolds88 Registered User Join Date: Jul 2011 Location: WV Posts: 946	Re: Grinding noise in bellhousing ): Here's a couple of thoughts. First about the pilot bushing. You can buy an actual bearing for this application. GM used them in the early diesel trucks. Second, with your noise problem. Two thoughts, first is your throwout bearing may have crapped out. Second would be that some of the clutch cover bolts may be coming loose. __________________ 72 GMC C2500 402/Th400 first truck (still have) 77 GMC C3500 CC dually Sold 70 C50 dump truck "Rusty" 87 K10 Suburban Sold 93 K2500 xcab 6.5TD 96 GMC K2500 Suburban 6.5 TD

06-26-2013, 07:32 PM	#10
77chevyinline6 Registered User Join Date: Dec 2011 Location: mount airy NC Posts: 308	Re: Grinding noise in bellhousing ): the throwout bearing seemed fine but when i took the transmision out the throwout bearing just kind of fell out.. __________________ 77 c10 (went from a inline 6 to 350) (converted to 3 speed in the floor) 350: mild cam, holley 600cfm 4bbl, summit stage 1 intake, accel billet distributer, flowtech headers, 2 1/4" exhaust with glasspacks, powermaster 160a alternator.

06-26-2013, 08:24 PM	#11
INSIDIOUS '86 Registered User Join Date: Jul 2009 Location: washington Posts: 4,178	Re: Grinding noise in bellhousing ): The throw out bearing should stay on the clutch fork unless it pulled out when you pulled the trans. You have the fork clips in the inside if the groove of the throw out bearing? Posted via Mobile Device __________________ 377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511

06-27-2013, 02:16 PM	#13
77chevyinline6 Registered User Join Date: Dec 2011 Location: mount airy NC Posts: 308	Re: Grinding noise in bellhousing ): i had a "mechanic" install the the throwout bearing i really dont know how he had it __________________ 77 c10 (went from a inline 6 to 350) (converted to 3 speed in the floor) 350: mild cam, holley 600cfm 4bbl, summit stage 1 intake, accel billet distributer, flowtech headers, 2 1/4" exhaust with glasspacks, powermaster 160a alternator.

06-27-2013, 04:18 PM	#14
INSIDIOUS '86 Registered User Join Date: Jul 2009 Location: washington Posts: 4,178	Re: Grinding noise in bellhousing ): Ok well take it all apart and we can guide you in getting her done and back on the road. Worst we can do is fix it right? Posted via Mobile Device __________________ 377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511

06-27-2013, 10:53 PM	#16
77chevyinline6 Registered User Join Date: Dec 2011 Location: mount airy NC Posts: 308	Re: Grinding noise in bellhousing ): well guys a bit of and update but first of all i wanted to say thanks, but i got the bellhousing off and there was metal shavings in it! it was getting dark so i quit for the night but i will be back at it soon! __________________ 77 c10 (went from a inline 6 to 350) (converted to 3 speed in the floor) 350: mild cam, holley 600cfm 4bbl, summit stage 1 intake, accel billet distributer, flowtech headers, 2 1/4" exhaust with glasspacks, powermaster 160a alternator.

06-30-2013, 01:18 PM	#18
mrolds88 Registered User Join Date: Jul 2011 Location: WV Posts: 946	Re: Grinding noise in bellhousing ): Any updates??? __________________ 72 GMC C2500 402/Th400 first truck (still have) 77 GMC C3500 CC dually Sold 70 C50 dump truck "Rusty" 87 K10 Suburban Sold 93 K2500 xcab 6.5TD 96 GMC K2500 Suburban 6.5 TD



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07-14-2013, 11:40 PM	#19
77chevyinline6 Registered User Join Date: Dec 2011 Location: mount airy NC Posts: 308	Re: Grinding noise in bellhousing ): well guys, i started the truck without the traqnsmission hooked up and it sounded beautiful, took the pan off the transmission and found chunks of metal and steel balls. lol. good thing i found 2 700r4s for 100$ sorry it took me so long to update __________________ 77 c10 (went from a inline 6 to 350) (converted to 3 speed in the floor) 350: mild cam, holley 600cfm 4bbl, summit stage 1 intake, accel billet distributer, flowtech headers, 2 1/4" exhaust with glasspacks, powermaster 160a alternator.

07-14-2013, 11:42 PM	#20
INSIDIOUS '86 Registered User Join Date: Jul 2009 Location: washington Posts: 4,178	Re: Grinding noise in bellhousing ): So an input bearing or throwout bearing failure I presume? Posted via Mobile Device __________________ 377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511

07-14-2013, 11:59 PM	#21
77chevyinline6 Registered User Join Date: Dec 2011 Location: mount airy NC Posts: 308	Re: Grinding noise in bellhousing ): throwout bearing was fine, so i guess it was the input. i dont know much about transmissions this was my first truck and my first engine swap/rebuild and so on, but heres the pieces we found Attached Images __________________ 77 c10 (went from a inline 6 to 350) (converted to 3 speed in the floor) 350: mild cam, holley 600cfm 4bbl, summit stage 1 intake, accel billet distributer, flowtech headers, 2 1/4" exhaust with glasspacks, powermaster 160a alternator.

07-15-2013, 12:33 AM	#22
INSIDIOUS '86 Registered User Join Date: Jul 2009 Location: washington Posts: 4,178	Re: Grinding noise in bellhousing ): Yup internal bearing. Saginaw trans right? Those aren't to hard to find Posted via Mobile Device __________________ 377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511

07-15-2013, 12:38 AM	#23
77chevyinline6 Registered User Join Date: Dec 2011 Location: mount airy NC Posts: 308	Re: Grinding noise in bellhousing ): yeah, its a saginaw. this is the 2nd one that has been destroyed in my truck. Having a heavy foot doesnt help though __________________ 77 c10 (went from a inline 6 to 350) (converted to 3 speed in the floor) 350: mild cam, holley 600cfm 4bbl, summit stage 1 intake, accel billet distributer, flowtech headers, 2 1/4" exhaust with glasspacks, powermaster 160a alternator.

07-15-2013, 01:00 AM	#24
MalibuSSwagon Registered User Join Date: Sep 2009 Location: Weare,NH Posts: 1,592	Re: Grinding noise in bellhousing ): Yup late saginaws are pretty weak. Time to upgrade. __________________ Eric 1992 Oldsmobile Custom Cruiser 1986 Chevrolet C10\|5.3L\|TKO600\|Shortbed\|Custom Deluxe 1983 Malibu Wagon\|TPI 305\|T5 5 speed\|3.73 non-posi

07-15-2013, 01:02 AM	#25
77chevyinline6 Registered User Join Date: Dec 2011 Location: mount airy NC Posts: 308	Re: Grinding noise in bellhousing ): yeah, it was fine when i had my 250l6 in there and now with a mildly built 350 it didnt even last 2 weeks __________________ 77 c10 (went from a inline 6 to 350) (converted to 3 speed in the floor) 350: mild cam, holley 600cfm 4bbl, summit stage 1 intake, accel billet distributer, flowtech headers, 2 1/4" exhaust with glasspacks, powermaster 160a alternator.

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