Rearend info - The 1947 - Present Chevrolet & GMC Truck Message Board Network

polevault1977 · 11-30-2002, 03:43 PM

I got a 3.73 rearend from a friend. I am in the process of cleaning, painting, new seals, etc. and just realized that the rear drums are finned. Is this a 3/4 ton? They measure 2X11. If so do I need a 3/4 ton rebuild kit including springs, shoes, cylinder, etc. or will a 1/2 ton do? Main thing I am looking for is any differences that I might be missing.

Thanks, Danny

PS Wes, help me if you can?!!!

polevault1977 · 11-30-2002, 09:10 PM

Ok, do these id numbers help with me figuring out what rearend I have? 1/2 or 3/4T

GM56
NF3896838

Thanks, Danny

polevault1977 · 11-30-2002, 11:05 PM

Update, I've found that my rearend also has a THC W234 code which is a 71 1/2T 3.73. Now all I have to figure is is if the finned drums are the orginal ones. I thought most of them were nonfinned?

7T1BURB · 12-01-2002, 02:57 AM

Just finished installing the refurbished THC rear end in our 71 Burb (1/2 Ton) yesterday....as you state, 3.73 is the THC code and the "finned" drums are the original drums that came on the vehicle.....Pinion yoke seal is Timken # 8460N and axle seal(s) is Timken # 8835-S........each seal cost about $3.50 at our local Auto Zone. FYI: new wheel cylinders (although not Wagner-Lockheed brand) were only a few bucks more than the rebuild kits so you might consider checking the price difference where you are. Hope this helps!!!

polevault1977 · 12-01-2002, 10:36 AM

7T1BURB

Thanks for the reply. Your info was very helpful. The rearend I got did not have the axles and drums installed when I got it, but I think I got the right stuff now. Finned drums and all. I just got a little bit confused. 5 bolt drum-1/2T duh. Sometimes its hard to put the pieceds back together, if you didn't see them come apart!
Thanks again, I'm back on track. Sure would like to see this baby rollin'

Danny

11-30-2002, 03:43 PM	#1
polevault1977 Pick'n up the pieces! Join Date: Sep 2002 Location: Marietta, Oklahoma Posts: 198	Rearend info I got a 3.73 rearend from a friend. I am in the process of cleaning, painting, new seals, etc. and just realized that the rear drums are finned. Is this a 3/4 ton? They measure 2X11. If so do I need a 3/4 ton rebuild kit including springs, shoes, cylinder, etc. or will a 1/2 ton do? Main thing I am looking for is any differences that I might be missing. Thanks, Danny PS Wes, help me if you can?!!!

12-01-2002, 02:57 AM	#4
7T1BURB Registered User Join Date: Aug 2002 Location: Newport News, VA Posts: 190	Just finished installing the refurbished THC rear end in our 71 Burb (1/2 Ton) yesterday....as you state, 3.73 is the THC code and the "finned" drums are the original drums that came on the vehicle.....Pinion yoke seal is Timken # 8460N and axle seal(s) is Timken # 8835-S........each seal cost about $3.50 at our local Auto Zone. FYI: new wheel cylinders (although not Wagner-Lockheed brand) were only a few bucks more than the rebuild kits so you might consider checking the price difference where you are. Hope this helps!!! Last edited by 7T1BURB; 12-01-2002 at 03:05 AM.

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11-30-2002, 09:10 PM	#2
polevault1977 Pick'n up the pieces! Join Date: Sep 2002 Location: Marietta, Oklahoma Posts: 198	Ok, do these id numbers help with me figuring out what rearend I have? 1/2 or 3/4T GM56 NF3896838 Thanks, Danny

11-30-2002, 11:05 PM	#3
polevault1977 Pick'n up the pieces! Join Date: Sep 2002 Location: Marietta, Oklahoma Posts: 198	Update, I've found that my rearend also has a THC W234 code which is a 71 1/2T 3.73. Now all I have to figure is is if the finned drums are the orginal ones. I thought most of them were nonfinned?

12-01-2002, 10:36 AM	#5
polevault1977 Pick'n up the pieces! Join Date: Sep 2002 Location: Marietta, Oklahoma Posts: 198	7T1BURB Thanks for the reply. Your info was very helpful. The rearend I got did not have the axles and drums installed when I got it, but I think I got the right stuff now. Finned drums and all. I just got a little bit confused. 5 bolt drum-1/2T duh. Sometimes its hard to put the pieceds back together, if you didn't see them come apart! Thanks again, I'm back on track. Sure would like to see this baby rollin' Danny



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