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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Rear Drivelines, Drive Axles and Gearing => Topic started by: bigblockstepside on September 26, 2015, 09:31:34 am

Title: Rear end
Post by: bigblockstepside on September 26, 2015, 09:31:34 am

I have a 1977 c10  1/2 ton a was looking for information on what other factory rear end with posi traction could be swapped in with no problem any and all information would be greatly appreciated.

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Title: Re: Rear end
Post by: Irish_Alley on September 26, 2015, 10:00:26 am

you want to swap rear ends or just the gears? a full swap would be cheaper i think. but what rear do you have now?(take a picture if you dont know)

Title: Re: Rear end
Post by: bigblockstepside on September 26, 2015, 12:18:46 pm

12 bolt half ton 5 lug  WHOLE rear end would be fine

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Title: Re: Rear end
Post by: bigblockstepside on September 26, 2015, 12:20:10 pm

Just looking for an easy swap from anything else that would bolt up

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Title: Re: Rear end
Post by: roundhouse on September 26, 2015, 01:01:03 pm

Only thing that's a bolt in would be from another square body
Hard to find
The back axle is way too weak for a half ton
In the junkyards all the back axles are
Missing


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Title: Re: Rear end
Post by: Captkaos on September 27, 2015, 10:06:50 am

anything from 73-81 C10's with a 12bolt is a bolt in, anything 78-87 C10's is a bolt in but you have to use a hybrid u-joint.

Title: Re: Rear end
Post by: SkinnyG on September 27, 2015, 11:19:07 am

I searched high and low for a decent 12-bolt for mine - they were all junk.  I ended up coughing up the dough for a full-on rebuild of mine, with a TrueTrac diff. 

Hard to find a decent anything that last rolled off the assembly line in 981.

Title: Re: Rear end
Post by: roundhouse on September 27, 2015, 10:48:58 pm

14 bolts are easy to find
They are strong
10 and 12 bolts are typical weak GM cost cutting junk that had no business under a full size pickup



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