10 bolt question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

old geezer · 04-07-2008, 07:13 PM

Hey guys, I'm new here, and the new owner of a 68 GMC shortbed. The question I have for you is: Mine has a 10 bolt rear end, and I was wondering why? Aren't most 12 bolt? What rear end is this, assuming it's factory? I'm new to these trucks, but not to hot rods, so please be tolerant of my ignorance. I'm looking into installing a "posi" unit, and can't find this rear listed in any JEG's or Summit mags. Kind of looks like a Dana 44.
Thanks, Scott

msgross · 04-07-2008, 07:42 PM

send a pic and look for numbers on the axle or center area...

12 bolt was stock so someone swapped it more than likely, maybe they wanted the gearing or it was from a car.... who knows.

wibilly · 04-07-2008, 08:22 PM

was it a big block truck? let's see some pics

old geezer · 04-08-2008, 12:33 PM

I'll get a few pics of the rear up soon, but no, it was a 307/3 speed truck.

It's now a 355/4speed truck.

Had an "expert" look uder it last night, and he was amazed that it had leaf springs, then he realized it was a GMC. Guess he was just a Chevy "expert".

see ten · 04-08-2008, 12:41 PM

Looks like a great start for a cool ride! Welcome to the board from north Georgia! I guess there's always the possibility of it having a rearend out of a later 4x4 under it. They were 6 lug 10 bolts that were used with leaves. I've got no idea if it would even work. But it's hard to say without pics.

Blazer1970 · 04-08-2008, 01:34 PM

It could be a Dana 44. Some were used in GMC half tons from the factory.

old geezer · 04-08-2008, 11:32 PM

Here's my rear....

Looking more and more like the 44.
On another note...Is there anything odd about this seat? PO(previous owner) said he ordered the truck with this seat.

I've been told it's rare...
Thanks for your time and info.

**john** · 04-09-2008, 01:06 AM

Nice truck. Those are buddy bucket seats. Only in 1967-1968 Not really rare, but not real common either. Nice option. A set of them in your condition would sell from $500 up.

stllookn · 04-09-2008, 01:16 AM

Welcome from Kent, WA. Really nice looking project. I was going to tell you that those seats are very strange and I would trade you a nice new bench seat for them...LOL! That's a find!

Bob 68327 · 04-09-2008, 01:20 AM

Yup , That's a 44

sandking · 04-09-2008, 03:45 AM

Sorry to hijack, but now I am confused. Is this a 12 bolt in this picture or??

dan42 · 04-09-2008, 03:58 AM

Yes - that's what they usually came with.

msgross · 04-09-2008, 03:02 PM

those buddy bucket seats in that condition are worth more like $800+

Very nice truck you have,,, few mods and paint and you are set...

04-07-2008, 07:13 PM	#1
old geezer Registered User Join Date: Apr 2008 Location: Douglasville, Georgia Posts: 8	10 bolt question Hey guys, I'm new here, and the new owner of a 68 GMC shortbed. The question I have for you is: Mine has a 10 bolt rear end, and I was wondering why? Aren't most 12 bolt? What rear end is this, assuming it's factory? I'm new to these trucks, but not to hot rods, so please be tolerant of my ignorance. I'm looking into installing a "posi" unit, and can't find this rear listed in any JEG's or Summit mags. Kind of looks like a Dana 44. Thanks, Scott Last edited by old geezer; 04-08-2008 at 11:38 PM.

04-07-2008, 07:42 PM	#2
msgross Registered User Join Date: Jul 2006 Location: Central PA Posts: 12,201	Re: 10 bolt question send a pic and look for numbers on the axle or center area... 12 bolt was stock so someone swapped it more than likely, maybe they wanted the gearing or it was from a car.... who knows. __________________ The Garage: 1968 K-10 SWB - "Project Money Pit" 1996 Z-71 - "huntin rig" 1969 C-10 LWB (SOLD) "Project flip that truck or else" 1993 Passport, F@rd 1-ton (SOLD)"Project Cousin Eddie" My Garage Build "The 1,000 footer"

04-07-2008, 08:22 PM	#3
wibilly Senior Member Join Date: Nov 2005 Location: northwestern wi Posts: 2,111	Re: 10 bolt question was it a big block truck? let's see some pics __________________ common sense isn't so common anymore

04-08-2008, 12:33 PM	#4
old geezer Registered User Join Date: Apr 2008 Location: Douglasville, Georgia Posts: 8	Re: 10 bolt question I'll get a few pics of the rear up soon, but no, it was a 307/3 speed truck. It's now a 355/4speed truck. Had an "expert" look uder it last night, and he was amazed that it had leaf springs, then he realized it was a GMC. Guess he was just a Chevy "expert".

04-08-2008, 12:41 PM	#5
see ten WTB this ad Join Date: Sep 2004 Location: Lafayette Georgia Posts: 5,074	Re: 10 bolt question Looks like a great start for a cool ride! Welcome to the board from north Georgia! I guess there's always the possibility of it having a rearend out of a later 4x4 under it. They were 6 lug 10 bolts that were used with leaves. I've got no idea if it would even work. But it's hard to say without pics.

04-08-2008, 01:34 PM	#6
Blazer1970 Registered User Join Date: Dec 1999 Location: Old Mission, MI, USA Posts: 2,510	Re: 10 bolt question It could be a Dana 44. Some were used in GMC half tons from the factory. __________________ Tim

04-08-2008, 11:32 PM	#7
old geezer Registered User Join Date: Apr 2008 Location: Douglasville, Georgia Posts: 8	Re: 10 bolt question Here's my rear.... Looking more and more like the 44. On another note...Is there anything odd about this seat? PO(previous owner) said he ordered the truck with this seat. I've been told it's rare... Thanks for your time and info.

04-09-2008, 01:06 AM	#8
john member #16 Join Date: Dec 1999 Location: Yuba City Ca. Posts: 3,618	Re: 10 bolt question Nice truck. Those are buddy bucket seats. Only in 1967-1968 Not really rare, but not real common either. Nice option. A set of them in your condition would sell from $500 up. __________________ john http://67-72chevytrucks.com/vboard/showgroups.php board vendors http://www.flickr.com/photos/1745471...7602865984234/ Last edited by john; 04-09-2008 at 01:08 AM.

04-09-2008, 01:16 AM	#9
stllookn Saving 1 truck at a time! Join Date: Aug 2001 Location: Kent, WA Posts: 6,465	Re: 10 bolt question Welcome from Kent, WA. Really nice looking project. I was going to tell you that those seats are very strange and I would trade you a nice new bench seat for them...LOL! That's a find! __________________ '68 C20 Longhorn 50th Anniversary 400/TH400 '68 C20 Longhorn 50th Anniversary 468/TH400w/buckets '72 C20 Halfhorn (Longhorn w/o cab and front clip) '69 Flxible Cruiser (look up ugly in the dictionary)

04-09-2008, 01:20 AM	#10
Bob 68327 72 Chevelle Club Join Date: Jun 2007 Location: Newton , Iowa Posts: 2,052	Re: 10 bolt question Yup , That's a 44 __________________ I Have The Right To Remain Silent,But Lack The Ability 1972 Chevelle ... Mine 2006 Trailblazer... Hers 2002 Buick century ... Kids 2002 K1500 Z-71 EXT CAB ... Daily Driver 2005 Rockwood Roo ... For Camping 1974 Harley-Davidson XLH Sportster 84'' stroker

04-09-2008, 03:45 AM	#11
sandking .....I am working on it..... Join Date: Jul 2007 Location: Anaheim Hills, Ca Posts: 960	Re: 10 bolt question Sorry to hijack, but now I am confused. Is this a 12 bolt in this picture or?? Attached Images

04-09-2008, 03:58 AM	#12
dan42 Registered User Join Date: Feb 2007 Location: Cali Central Coast Posts: 5,191	Re: 10 bolt question Yes - that's what they usually came with. __________________ '67 SWB Fleetside ZZ4/350/Tremec 5-speed/4link/Scott's IFS - and fun as heck! SOLD Click here to support the board Philippians 4: 6-7

04-09-2008, 03:02 PM	#13
msgross Registered User Join Date: Jul 2006 Location: Central PA Posts: 12,201	Re: 10 bolt question those buddy bucket seats in that condition are worth more like $800+ Very nice truck you have,,, few mods and paint and you are set... __________________ The Garage: 1968 K-10 SWB - "Project Money Pit" 1996 Z-71 - "huntin rig" 1969 C-10 LWB (SOLD) "Project flip that truck or else" 1993 Passport, F@rd 1-ton (SOLD)"Project Cousin Eddie" My Garage Build "The 1,000 footer"



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