Always breaking clutch shaft pivot ball. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Kanzapanzer · 02-27-2007, 12:46 PM

Guys, I need your help. Got a 72 swb with a small block/3 spd. It originally had an inline 6 w/3 spd. The thing keeps snapping off the engine block pivot ball. Stock pressure plate, original pedal and linkage set-up. This is the 3rd one in a year.

**special-K** · 02-27-2007, 12:54 PM

Is it greased?How is it lined up?Are the engine towers in the rearward 6cyl. position or is it all moved forward into the factoty V8 position.If the latter,the trans is forward 2 1/2" from original 6cyl. position and if the ball-pivot/z-bar is the 6cyl.stuff it`s prolly pretty cocked.There were offset mounts made for some applications and some pivots bolted direct to the block.Got pics?

3/4tonterror · 02-27-2007, 12:58 PM

if it is breaking the ball on the motor, it sounds like to much movement of the motor.

Kanzapanzer · 02-27-2007, 01:18 PM

Everything sets nice and square, it greased and moves freely when you disconnect the lower linkage.

Engine movement? That would be the side that would raise up due to the torque of the engine. Wonder if the motor mount is busted. This is my kid's truck. I wonder if I'm getting the whole story here?

Thanks guys!

**special-K** · 02-27-2007, 01:36 PM

The process of deduction point to the motor mount(and rascal clutchin`?)

3/4tonterror · 02-27-2007, 01:42 PM

i see this same kind of thing in front wheel drive cars, kids drop the clutch which torques the motor and breaks a motor or tranny mount.i know i used to beat on my first standard when i was in high school.

Kanzapanzer · 02-27-2007, 01:44 PM

Gotta a Turbo 350 in the garage, hmmm.

**special-K** · 02-27-2007, 05:50 PM

POWERBRAKE!!!!YEAH!!!!!

Sorry,maybe a "if you want it to treat you right,you gotta treat it right" talk would be more effective.Next time,he pays.

Kanzapanzer · 02-27-2007, 06:16 PM

He already knows how an ez-out works, he's done this before. He get's to do it again.

**'68OrangeSunshine** · 02-28-2007, 07:10 AM

The L6 Z-Bar is different from the V8 Z-bar. I think the tube part is longer on the L6 unit. Also the V8 clutch (upper) pushrod has a 45* bend in it, that the L6 pushrod doesn't. The V8 parts should be easier to find. They don't make the L6 pushrod anymore.

Kanzapanzer · 02-28-2007, 09:14 AM

Broken motor mount, motorhead behind the wheel.

02-27-2007, 12:46 PM	#1
Kanzapanzer Registered User Join Date: Jan 2006 Location: Kansas Posts: 9	Always breaking clutch shaft pivot ball. Guys, I need your help. Got a 72 swb with a small block/3 spd. It originally had an inline 6 w/3 spd. The thing keeps snapping off the engine block pivot ball. Stock pressure plate, original pedal and linkage set-up. This is the 3rd one in a year.

02-27-2007, 12:54 PM	#2
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,861	Re: Always breaking clutch shaft pivot ball. Is it greased?How is it lined up?Are the engine towers in the rearward 6cyl. position or is it all moved forward into the factoty V8 position.If the latter,the trans is forward 2 1/2" from original 6cyl. position and if the ball-pivot/z-bar is the 6cyl.stuff it`s prolly pretty cocked.There were offset mounts made for some applications and some pivots bolted direct to the block.Got pics? __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

02-27-2007, 12:58 PM	#3
3/4tonterror Registered User Join Date: Dec 2006 Location: jaffrey,NH Posts: 325	Re: Always breaking clutch shaft pivot ball. if it is breaking the ball on the motor, it sounds like to much movement of the motor.

02-27-2007, 01:18 PM	#4
Kanzapanzer Registered User Join Date: Jan 2006 Location: Kansas Posts: 9	Re: Always breaking clutch shaft pivot ball. Everything sets nice and square, it greased and moves freely when you disconnect the lower linkage. Engine movement? That would be the side that would raise up due to the torque of the engine. Wonder if the motor mount is busted. This is my kid's truck. I wonder if I'm getting the whole story here? Thanks guys!

02-27-2007, 01:36 PM	#5
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,861	Re: Always breaking clutch shaft pivot ball. The process of deduction point to the motor mount(and rascal clutchin`?) __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

02-27-2007, 01:42 PM	#6
3/4tonterror Registered User Join Date: Dec 2006 Location: jaffrey,NH Posts: 325	Re: Always breaking clutch shaft pivot ball. i see this same kind of thing in front wheel drive cars, kids drop the clutch which torques the motor and breaks a motor or tranny mount.i know i used to beat on my first standard when i was in high school.

02-27-2007, 01:44 PM	#7
Kanzapanzer Registered User Join Date: Jan 2006 Location: Kansas Posts: 9	Re: Always breaking clutch shaft pivot ball. Gotta a Turbo 350 in the garage, hmmm.

02-27-2007, 05:50 PM	#8
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,861	Re: Always breaking clutch shaft pivot ball. POWERBRAKE!!!!YEAH!!!!! Sorry,maybe a "if you want it to treat you right,you gotta treat it right" talk would be more effective.Next time,he pays. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

02-27-2007, 06:16 PM	#9
Kanzapanzer Registered User Join Date: Jan 2006 Location: Kansas Posts: 9	Re: Always breaking clutch shaft pivot ball. He already knows how an ez-out works, he's done this before. He get's to do it again.

02-28-2007, 07:10 AM	#10
'68OrangeSunshine Senior Member Join Date: Feb 2002 Location: Tucson, AZ USA Posts: 7,210	Re: Always breaking clutch shaft pivot ball. The L6 Z-Bar is different from the V8 Z-bar. I think the tube part is longer on the L6 unit. Also the V8 clutch (upper) pushrod has a 45* bend in it, that the L6 pushrod doesn't. The V8 parts should be easier to find. They don't make the L6 pushrod anymore. __________________ Every 25 years I like to rebuild that 292, whether it needs it or not.

02-28-2007, 09:14 AM	#11
Kanzapanzer Registered User Join Date: Jan 2006 Location: Kansas Posts: 9	Re: Always breaking clutch shaft pivot ball. Broken motor mount, motorhead behind the wheel.



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