Trying to determine what rear axles my 67 has? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

johnymac · 06-10-2003, 03:04 PM

I have a 67 C10 stepside. I believe it came with factory 411 gears in her. Now has 373 in her. It is a 12 bolt 8.875 rear end, has coil springs.
Anyway, I am preparing to put a posi unit in it. In my search for parts I have been asked if I have a Splicer 44 or 60, or a HO33 or 35 axles. Is there any way for me to tell? I can't find any numbers on the axle tubes. There are several different combos, so can't just buy all that might apply.

Can anyone help me?
Thanks in advance for any that reply.

Thanks again!!

Longhorn Man · 06-10-2003, 03:57 PM

I'm thinking the Splicer 44 or 60, or a HO33 or 35 axles are all in bigger trucks or 4X4...I never heard the rear in a C/10 be called anything more than a GM 12 bolt.

da-burb · 06-10-2003, 08:20 PM

It could be a Dana(Spicer) 44 or a 12 bolt if it was still original. If it was the Dana 60 it would have to be a semi-floater. I don't know if they were ever offered in our trucks. In either case, identifying the Dana is easy. They have a 44 or 60 cast into the web of the center housing. I also know that the cover of the Dana 60 has 10 bolts holding it on. I haven't counted the 44, but I am going to guess that it isn't 12. So I think you answered your own question when you said "It is a 12 bolt".

johnymac · 06-10-2003, 09:00 PM

Oh yes it is a 12 bolt gm 8.875 rear end. I am trying to get the pinion gear and inner and outter beaings. This is when they ask what axles the truck has. This is where I am confused.

I wouldn't care, tear apart and bring the parts to the store, but doing this about 60 miles from home on a Saturday night, so finding the parts the following Sunday might be a problem. I have over a week before we do, so just trying to get any ideas on figuring out what my truck might have.
Thanks for the replies!!

Vince M · 06-10-2003, 09:19 PM

The axle numbers on a GM truck 12 bolt is on top of the passenger side axle tube. It's about midway between the pumpkin and the brake backing plate right on top. You might have to do a little scaping and wire brushing to find it.

You can check out some of the drivetrain websites. They have a lot of info on number locations and axle identification.

http://www.drivetrain.com/

Duallie · 06-10-2003, 11:29 PM

If the store is giving you choices of dana(spicer) 44 or HO33/35, you must have a GMC and not a chevy. Try going back and asking for the same parts but for a Chevrolet. Or ask for the inner/outer bearings for an Impala 12-bolt of the same vintage and cross reference that way. BUT! The impala will have a LARGER pinion bearing than a truck 12-bolt. FYI

johnymac · 06-11-2003, 07:46 AM

Thanks very mucg guys!!
I see in summit they sell Richmond and Ratech install kits. They just list 12 bolt truck, none of this other crap I am getting. I don't need the whole kit, but at this point thinking of buying.

I called, NAPA, Auto Zone, and Robbins which is a local auto parts store in NE. Anyway, they all have the same listings for a 1967 C10 2 wheel drive. Looks like I might buy mail order.

Thanks again!!

06-10-2003, 03:04 PM	#1
johnymac Registered User Join Date: Mar 2001 Location: Dover, NH USA Posts: 194	Trying to determine what rear axles my 67 has? I have a 67 C10 stepside. I believe it came with factory 411 gears in her. Now has 373 in her. It is a 12 bolt 8.875 rear end, has coil springs. Anyway, I am preparing to put a posi unit in it. In my search for parts I have been asked if I have a Splicer 44 or 60, or a HO33 or 35 axles. Is there any way for me to tell? I can't find any numbers on the axle tubes. There are several different combos, so can't just buy all that might apply. Can anyone help me? Thanks in advance for any that reply. Thanks again!!

06-10-2003, 08:20 PM	#3
da-burb "Ochre Ogre" Join Date: Apr 2000 Location: Springfield, MN Posts: 3,558	It could be a Dana(Spicer) 44 or a 12 bolt if it was still original. If it was the Dana 60 it would have to be a semi-floater. I don't know if they were ever offered in our trucks. In either case, identifying the Dana is easy. They have a 44 or 60 cast into the web of the center housing. I also know that the cover of the Dana 60 has 10 bolts holding it on. I haven't counted the 44, but I am going to guess that it isn't 12. So I think you answered your own question when you said "It is a 12 bolt". __________________ Bowtie Truck Stop Inc. Mid-West GM Truck Restoration Parts Supplier Your Key Parts, Auto Metal Direct, Dynacorn, and Goodmark dealer. like us @ www.facebook.com/BowtieTruckStop 1971 C-10 Suburban (Ochre) 1971 K-10 Suburban (Ochre) 1972 C-10 Suburban (Ochre) 1972 K-20 Suburban (Yellow- that just aint right!) Springfield, Minnesota 56087

06-10-2003, 09:00 PM	#4
johnymac Registered User Join Date: Mar 2001 Location: Dover, NH USA Posts: 194	It's a 12 bolt. Oh yes it is a 12 bolt gm 8.875 rear end. I am trying to get the pinion gear and inner and outter beaings. This is when they ask what axles the truck has. This is where I am confused. I wouldn't care, tear apart and bring the parts to the store, but doing this about 60 miles from home on a Saturday night, so finding the parts the following Sunday might be a problem. I have over a week before we do, so just trying to get any ideas on figuring out what my truck might have. Thanks for the replies!!

06-10-2003, 09:19 PM	#5
Vince M Senior Member Join Date: Apr 2000 Location: Orlando, FL Posts: 1,076	The axle numbers on a GM truck 12 bolt is on top of the passenger side axle tube. It's about midway between the pumpkin and the brake backing plate right on top. You might have to do a little scaping and wire brushing to find it. You can check out some of the drivetrain websites. They have a lot of info on number locations and axle identification. http://www.drivetrain.com/ __________________ ............................................................ 68 Chevy CST SWB w/LS1, carb & 700r4. Golden Anniversary clone with a few improvements.

06-10-2003, 11:29 PM	#6
Duallie Registered User Join Date: Feb 2001 Location: Nikiski, Alaska Posts: 477	If the store is giving you choices of dana(spicer) 44 or HO33/35, you must have a GMC and not a chevy. Try going back and asking for the same parts but for a Chevrolet. Or ask for the inner/outer bearings for an Impala 12-bolt of the same vintage and cross reference that way. BUT! The impala will have a LARGER pinion bearing than a truck 12-bolt. FYI __________________ Just as if I knew what I was doin'

06-10-2003, 03:57 PM	#2
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	I'm thinking the Splicer 44 or 60, or a HO33 or 35 axles are all in bigger trucks or 4X4...I never heard the rear in a C/10 be called anything more than a GM 12 bolt.

06-11-2003, 07:46 AM	#7
johnymac Registered User Join Date: Mar 2001 Location: Dover, NH USA Posts: 194	Thanks very mucg guys!! I see in summit they sell Richmond and Ratech install kits. They just list 12 bolt truck, none of this other crap I am getting. I don't need the whole kit, but at this point thinking of buying. I called, NAPA, Auto Zone, and Robbins which is a local auto parts store in NE. Anyway, they all have the same listings for a 1967 C10 2 wheel drive. Looks like I might buy mail order. Thanks again!!

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