Need help on Rear Axle? Don't know what it is. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

RoughKuntry · 07-08-2013, 06:04 PM

I have a 1973 GMC 25 Hundred Super Custom. I know it says 3/4 ton truck but here's the problem the Rear Axle supports a 5th wheel hitch in the back of the bed. I will post pictures, I have the rear axle manufacture numbers but that's it. It has an 11.24 Drum, And napa still can't figure out what it is. Can I get some help guys? Its a 14 bolt. I though it looked like a 1 ton Single rear end. But I could be wrong.

b454rat · 07-08-2013, 06:44 PM

3/4 and 1 ton are pretty much the same rear, just the 1 ton has bigger breaks. I believe 11" or 13" are the options for breaks...

SamsAutoParts73-87 · 07-08-2013, 10:22 PM

Quote:

Originally Posted by b454rat

3/4 and 1 ton are pretty much the same rear, just the 1 ton has bigger breaks. I believe 11" or 13" are the options for breaks...

The one tons had 2.75? x 12" & 3.5" x 13"

If it has the 11" brakes odds are it is a 3/4 ton rear. you can also tell by the spring plate mounts the 1 ton is different then the 3/4 ton. But other then that they are the same.

-Sam

RoughKuntry · 07-12-2013, 02:20 PM

found out that the rear is a Heavy Duty 3/4 ton. And the parts store still thinks that 1 ton break shoes will fit it. :/ So I called up the NAPA store and they had my parts ready this morning. so you all might get better pictures of the new truck soon
-Jeff

07-08-2013, 06:04 PM	#1
RoughKuntry Registered User Join Date: Mar 2013 Location: Washington Posts: 238	Need help on Rear Axle? Don't know what it is. I have a 1973 GMC 25 Hundred Super Custom. I know it says 3/4 ton truck but here's the problem the Rear Axle supports a 5th wheel hitch in the back of the bed. I will post pictures, I have the rear axle manufacture numbers but that's it. It has an 11.24 Drum, And napa still can't figure out what it is. Can I get some help guys? Its a 14 bolt. I though it looked like a 1 ton Single rear end. But I could be wrong. __________________ RoughKuntry 73 GMC 25 HUNDRED :Sold 79 GMC High Sierra 4x4 (Ma-Duece) :Sold 99 Chevrolet LS 4.8l/5 Speed Manual 4x4 :Selling 88 Chevrolet Burban 2500 4x4 :Buying

07-08-2013, 06:44 PM	#2
b454rat Senior Member Join Date: May 2004 Location: Binghamton, NY Posts: 3,464	Re: Need help on Rear Axle? Don't know what it is. 3/4 and 1 ton are pretty much the same rear, just the 1 ton has bigger breaks. I believe 11" or 13" are the options for breaks... __________________ 2000 GMC CCSB 454/4L80 6” lift SAS 1999 Chevy CCSB 454/NV4500 4” SAS 1999 GMC Yukon 350/4L60 6" SAS

07-12-2013, 02:20 PM	#4
RoughKuntry Registered User Join Date: Mar 2013 Location: Washington Posts: 238	Re: Need help on Rear Axle? Don't know what it is. found out that the rear is a Heavy Duty 3/4 ton. And the parts store still thinks that 1 ton break shoes will fit it. :/ So I called up the NAPA store and they had my parts ready this morning. so you all might get better pictures of the new truck soon -Jeff __________________ RoughKuntry 73 GMC 25 HUNDRED :Sold 79 GMC High Sierra 4x4 (Ma-Duece) :Sold 99 Chevrolet LS 4.8l/5 Speed Manual 4x4 :Selling 88 Chevrolet Burban 2500 4x4 :Buying



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