Is this a 63 rear diff? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

63frankintruck · 04-04-2016, 09:47 PM

Want to make sure this is a 63C 10 rear differential before I have a rebuilt. Can anyone verify this for me?

**aerotruk63** · 04-04-2016, 10:01 PM

Are the backing plates pressed on or bolted on would be the first indicator.

**aerotruk63** · 04-04-2016, 10:15 PM

Built in Warren Michigan in 1963 or 64. WE code is a 3.73 ratio positraction.

**aerotruk63** · 04-04-2016, 10:16 PM

WE code states 127" wheelbase.

**aerotruk63** · 04-04-2016, 10:18 PM

How they'd do the overhaul, watch the video.
https://www.youtube.com/watch?v=miCa9cDNKgI

63frankintruck · 04-05-2016, 08:58 AM

Backing plates are pressed on.
Thanks so much for the help guys!
A local shop will rebuild totally with 5 lug 30 spline axles, 3:42 gears, Eaton posi, new bearings, new yoke, for ~$1500.

63frankintruck · 04-06-2016, 06:13 AM

Quote:

Originally Posted by 63frankintruck

Backing plates are pressed on.
Thanks so much for the help guys!
A local shop will rebuild totally with 5 lug 30 spline axles, 3:42 gears, Eaton posi, new bearings, new yoke, for ~$1500.

Question for the rear end experts. My brother has a 70 C10 with a super brute Posi. I am told that super brutes are no longer available for 63 10.
Would a normal Eaton Posi hold up in my truck?

Are there different/stronger Posies a ailble for our 60's trucks?

**Captainfab** · 04-07-2016, 12:55 AM

The '63-'82 truck 12 bolt housings are all basically the same. The differences with the '63 12 bolt is 1) The pressed on backing plates and 2) The 17 spline axles 3) A different wheel/axle bearing and seal. As far as the carrier is concerned, any truck 12 bolt carrier will fit a '63 truck 12 bolt housing.

SSpeed66 · 04-05-2016, 05:32 PM

It already has the posi !

63frankintruck · 04-05-2016, 08:37 PM

Quote:

Originally Posted by SSpeed66

It already has the posi !

What??

**Captainfab** · 04-06-2016, 12:01 AM

If it is still inside after 53 years, then it will be a 17 spline posi. Depending on which posi unit it is, the spider gears may or may not be available. Plus the fact that it will likely need rebuilt. The cost of rebuilding a posi is nearly as much as buying a new unit.

Quote:

Originally Posted by SSpeed66

It already has the posi !

04-04-2016, 09:47 PM	#1
63frankintruck Registered User Join Date: Oct 2015 Location: Keller, tx Posts: 426	Is this a 63 rear diff? Want to make sure this is a 63C 10 rear differential before I have a rebuilt. Can anyone verify this for me? Attached Images

04-04-2016, 10:01 PM	#2
aerotruk63 Check The Champ, Demonstrator Join Date: Jun 2009 Location: Montreal,Quebec Posts: 6,627	Re: Is this a 63 rear diff? Are the backing plates pressed on or bolted on would be the first indicator. __________________ 1963 *Chevrolet Truck* Literature LINK: https://picasaweb.google.com/113840717762774560215 YouTube Channel with 20+ Original *Chevrolet Truck* Salesmen, Mechanics & Service Department Training Slideshows. https://www.youtube.com/results?sear...otruk63&page=1

04-04-2016, 10:15 PM	#3
aerotruk63 Check The Champ, Demonstrator Join Date: Jun 2009 Location: Montreal,Quebec Posts: 6,627	Re: Is this a 63 rear diff? Built in Warren Michigan in 1963 or 64. WE code is a 3.73 ratio positraction. __________________ 1963 *Chevrolet Truck* Literature LINK: https://picasaweb.google.com/113840717762774560215 YouTube Channel with 20+ Original *Chevrolet Truck* Salesmen, Mechanics & Service Department Training Slideshows. https://www.youtube.com/results?sear...otruk63&page=1

04-04-2016, 10:16 PM	#4
aerotruk63 Check The Champ, Demonstrator Join Date: Jun 2009 Location: Montreal,Quebec Posts: 6,627	Re: Is this a 63 rear diff? WE code states 127" wheelbase. __________________ 1963 *Chevrolet Truck* Literature LINK: https://picasaweb.google.com/113840717762774560215 YouTube Channel with 20+ Original *Chevrolet Truck* Salesmen, Mechanics & Service Department Training Slideshows. https://www.youtube.com/results?sear...otruk63&page=1

04-04-2016, 10:18 PM	#5
aerotruk63 Check The Champ, Demonstrator Join Date: Jun 2009 Location: Montreal,Quebec Posts: 6,627	Re: Is this a 63 rear diff? How they'd do the overhaul, watch the video. https://www.youtube.com/watch?v=miCa9cDNKgI __________________ 1963 *Chevrolet Truck* Literature LINK: https://picasaweb.google.com/113840717762774560215 YouTube Channel with 20+ Original *Chevrolet Truck* Salesmen, Mechanics & Service Department Training Slideshows. https://www.youtube.com/results?sear...otruk63&page=1

04-05-2016, 08:58 AM	#6
63frankintruck Registered User Join Date: Oct 2015 Location: Keller, tx Posts: 426	Re: Is this a 63 rear diff? Backing plates are pressed on. Thanks so much for the help guys! A local shop will rebuild totally with 5 lug 30 spline axles, 3:42 gears, Eaton posi, new bearings, new yoke, for ~$1500.

04-07-2016, 12:55 AM	#8
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,252	Re: Is this a 63 rear diff? The '63-'82 truck 12 bolt housings are all basically the same. The differences with the '63 12 bolt is 1) The pressed on backing plates and 2) The 17 spline axles 3) A different wheel/axle bearing and seal. As far as the carrier is concerned, any truck 12 bolt carrier will fit a '63 truck 12 bolt housing. __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE

04-05-2016, 05:32 PM	#9
SSpeed66 Registered User Join Date: Mar 2013 Location: Fruitvale, BC Posts: 72	Re: Is this a 63 rear diff? It already has the posi ! __________________ Living The Canadian Dream in British Columbia



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