Need a part number from the smart guys! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jorgensensc · 05-04-2008, 01:27 AM

Hey all. I went to change the axles on my '68 rear and started to take the bolt out that holds the pin in place. Mine was so easy to take out I thought I had it easy. Needless to say when I removed the bolt and it was only 1/2" long I realized that it had broken at some point in it's life. Well after a couple of days I have finally removed the rest of the bolt without damaging any threads (thank goodness). Now I need a replacement bolt, but chevy doesn't have a part number for me. You know the bolt I'm talking about. Threaded on top and a smooth shaft on the bottom part, about 2" long. Any idea on the part number and where I can possibly get a replacement? Thanks in advance.
SHawn

70rs/ss · 05-04-2008, 01:33 AM

Glad it came out, lets see the picts!! I'd just go to a wrecking yard, they will have junk axles to pull one out of, or possiblyGM (get in their paper catalogs).

**VetteVet** · 05-04-2008, 01:41 AM

This what you're talking about?

jorgensensc · 05-04-2008, 02:04 AM

Quote:

Originally Posted by VetteVet

This what you're talking about?

Yes that's the one. The right pic that your wrench is on. I'm starting to think that maybe the bent left trailing arm and the broken differential bolt may go hand in hand....Hmm, Coincidence.....or fact..... The plot thickens

jorgensensc · 05-04-2008, 01:59 AM

What pics would you like mike?
Pics of the disaster I have created?
Perhaps pics of the tool and the bolt (complete with easy put still in it)?
Or possibly the rear end and where the bolt should go?
I don't know where the top part of the bolt is, I think I threw it far far away!

jorgensensc · 05-04-2008, 02:02 AM

Oh!! I know, You want pics of my new dual bolt patterned Moser axles with new bearings and seals!!!

70rs/ss · 05-04-2008, 02:05 AM

As bad as that one where the guy cut the carrier near in half, your's seems tame!! He needs the bolt that holds the shaft in, they one that goes in the hole!

jorgensensc · 05-04-2008, 02:10 AM

BTW Mike,
The axles still didn't come out after removing the pin. They would not push in far enough to drop the c-clip. I ended up using and air hammer between the backing plate and the drum, and running it around the outside. Putting chisels in the gap as I made my way around the circumference of the drum. I'm glad I stood on the other side, because when it finally popped off it flew about 6 feet. THen the other side popped right off without as much effort. Go figure.
SHawn

**uncle** · 05-04-2008, 04:02 AM

Just a heads up. The bolt is different on a non-posi vs a posi.

joe231 · 05-04-2008, 04:36 AM

I saw some of those bolts at Napa, hanging on one of those racks you can rotate. not sure what applications they have

jorgensensc · 05-04-2008, 07:07 AM

THanks uncle!
I'll check there joe.

oldspowered67C10 · 05-04-2008, 11:43 AM

Seriously, out of all this style of rear ends(Danas, GMs and some Fords)that Ive rebuilt/taken apart, about 20% of them had broken bolts, its not that uncommon. You did it the right way for sure, Ive seen some pretty nasty stuff done is attempt to remove the broken off portion of the bolt. I think its called a differential pinion shaft retainer bolt, and if Im not mistaken alot of them are interchangeable(a dana one will work in a GM or a Ford etc.).

**special-K** · 05-04-2008, 01:03 PM

What are we calling this part?A differential carrier center pin?I can look it up if I know what it`s called.But,there`s no pictures.Or,maybe there is.Let me check the parts book and get back.Isn`t it known as the center pin?

70GMCer · 05-04-2008, 02:00 PM

It's call a "Pinion Shaft Lock Screw. If you have a posi, the part number is 3830672, non-posi is 472546. The thread size is 5/16"x18. Can't give you the length. Hope this helps....

**special-K** · 05-05-2008, 04:36 AM

You da man...if I may speak for others.

jorgensensc · 05-05-2008, 04:29 PM

Awesome!! Thanks 70GMCer!! Now I just need to find it!
SHawn

jorgensensc · 05-06-2008, 06:30 PM

Went to local chevy dealer and got the part. Cost all of 2.80. Thanks again for the part number 70GMCer!
Shawn

70GMCer · 05-06-2008, 07:56 PM

Glad you were able to get it......Good to know that they are still available....

05-04-2008, 01:27 AM	#1
jorgensensc Registered User Join Date: Jul 2003 Location: Cypress, Tx Posts: 4,005	Need a part number from the smart guys! Hey all. I went to change the axles on my '68 rear and started to take the bolt out that holds the pin in place. Mine was so easy to take out I thought I had it easy. Needless to say when I removed the bolt and it was only 1/2" long I realized that it had broken at some point in it's life. Well after a couple of days I have finally removed the rest of the bolt without damaging any threads (thank goodness). Now I need a replacement bolt, but chevy doesn't have a part number for me. You know the bolt I'm talking about. Threaded on top and a smooth shaft on the bottom part, about 2" long. Any idea on the part number and where I can possibly get a replacement? Thanks in advance. SHawn __________________ 1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE

05-04-2008, 01:33 AM	#2
70rs/ss Registered User Join Date: Dec 2004 Location: Northern AZ Posts: 7,271	Re: Need a part number from the smart guys! Glad it came out, lets see the picts!! I'd just go to a wrecking yard, they will have junk axles to pull one out of, or possiblyGM (get in their paper catalogs).

05-04-2008, 01:41 AM	#3
VetteVet Msgt USAF Ret Join Date: Jan 2005 Location: Kalamazoo, Michigan Posts: 8,709	Re: Need a part number from the smart guys! This what you're talking about? Attached Images __________________ VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative.

05-04-2008, 01:59 AM	#5
jorgensensc Registered User Join Date: Jul 2003 Location: Cypress, Tx Posts: 4,005	Re: Need a part number from the smart guys! What pics would you like mike? Pics of the disaster I have created? Perhaps pics of the tool and the bolt (complete with easy put still in it)? Or possibly the rear end and where the bolt should go? I don't know where the top part of the bolt is, I think I threw it far far away! Attached Images __________________ 1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE

05-04-2008, 02:02 AM	#6
jorgensensc Registered User Join Date: Jul 2003 Location: Cypress, Tx Posts: 4,005	Re: Need a part number from the smart guys! Oh!! I know, You want pics of my new dual bolt patterned Moser axles with new bearings and seals!!! Attached Images __________________ 1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE

05-04-2008, 02:05 AM	#7
70rs/ss Registered User Join Date: Dec 2004 Location: Northern AZ Posts: 7,271	Re: Need a part number from the smart guys! As bad as that one where the guy cut the carrier near in half, your's seems tame!! He needs the bolt that holds the shaft in, they one that goes in the hole!

05-04-2008, 02:10 AM	#8
jorgensensc Registered User Join Date: Jul 2003 Location: Cypress, Tx Posts: 4,005	Re: Need a part number from the smart guys! BTW Mike, The axles still didn't come out after removing the pin. They would not push in far enough to drop the c-clip. I ended up using and air hammer between the backing plate and the drum, and running it around the outside. Putting chisels in the gap as I made my way around the circumference of the drum. I'm glad I stood on the other side, because when it finally popped off it flew about 6 feet. THen the other side popped right off without as much effort. Go figure. SHawn __________________ 1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE

05-04-2008, 04:02 AM	#9
uncle Senior Member Join Date: Aug 2003 Location: Conyers,Ga. Posts: 7,286	Re: Need a part number from the smart guys! Just a heads up. The bolt is different on a non-posi vs a posi.

05-04-2008, 04:36 AM	#10
joe231 Registered User Join Date: Dec 2007 Location: Palmer, Alaska Posts: 13,821	Re: Need a part number from the smart guys! I saw some of those bolts at Napa, hanging on one of those racks you can rotate. not sure what applications they have __________________ *CHEVY ONLY*

05-04-2008, 07:07 AM	#11
jorgensensc Registered User Join Date: Jul 2003 Location: Cypress, Tx Posts: 4,005	Re: Need a part number from the smart guys! THanks uncle! I'll check there joe. __________________ 1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE

05-04-2008, 11:43 AM	#12
oldspowered67C10 Registered User Join Date: Jan 2006 Location: Cherry Valley,Ca Posts: 468	Re: Need a part number from the smart guys! Seriously, out of all this style of rear ends(Danas, GMs and some Fords)that Ive rebuilt/taken apart, about 20% of them had broken bolts, its not that uncommon. You did it the right way for sure, Ive seen some pretty nasty stuff done is attempt to remove the broken off portion of the bolt. I think its called a differential pinion shaft retainer bolt, and if Im not mistaken alot of them are interchangeable(a dana one will work in a GM or a Ford etc.).

05-04-2008, 01:03 PM	#13
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,861	Re: Need a part number from the smart guys! What are we calling this part?A differential carrier center pin?I can look it up if I know what it`s called.But,there`s no pictures.Or,maybe there is.Let me check the parts book and get back.Isn`t it known as the center pin? __________________ "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 ~

05-04-2008, 02:00 PM	#14
70GMCer Senior Member Join Date: Apr 2005 Location: Joppa, Maryland Posts: 4,408	Re: Need a part number from the smart guys! It's call a "Pinion Shaft Lock Screw. If you have a posi, the part number is 3830672, non-posi is 472546. The thread size is 5/16"x18. Can't give you the length. Hope this helps.... __________________ 1997 GMC Sierra Ext 1965 Mustang Last edited by 70GMCer; 05-04-2008 at 07:03 PM.

05-05-2008, 04:36 AM	#15
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,861	Re: Need a part number from the smart guys! You da man...if I may speak for others. __________________ "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 ~

05-05-2008, 04:29 PM	#16
jorgensensc Registered User Join Date: Jul 2003 Location: Cypress, Tx Posts: 4,005	Re: Need a part number from the smart guys! Awesome!! Thanks 70GMCer!! Now I just need to find it! SHawn __________________ 1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE



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05-06-2008, 06:30 PM	#17
jorgensensc Registered User Join Date: Jul 2003 Location: Cypress, Tx Posts: 4,005	Re: Need a part number from the smart guys! Went to local chevy dealer and got the part. Cost all of 2.80. Thanks again for the part number 70GMCer! Shawn __________________ 1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE Last edited by jorgensensc; 05-06-2008 at 06:30 PM.

05-06-2008, 07:56 PM	#18
70GMCer Senior Member Join Date: Apr 2005 Location: Joppa, Maryland Posts: 4,408	Re: Need a part number from the smart guys! Glad you were able to get it......Good to know that they are still available.... __________________ 1997 GMC Sierra Ext 1965 Mustang

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