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What rear axle is in a 1972 chevy 3/4 ton 4wd pickup?

Discussion in 'The Garage' started by cybrfire, Jan 19, 2004.

  1. cybrfire

    cybrfire 1 ton status Vendor GMOTM Winner

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    Has a 3rd member design like a Ford 9 inch. Full floater hubs in the center of the wheel. Looks comparable to a 14 Bolt in size of axle tubes but didn't actually measure.
     
  2. sled_dog

    sled_dog 1 ton status

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    Eaton? My buddy claims his C20 has a rockwell rear.
     
  3. SUBFAN

    SUBFAN 1/2 ton status

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    Eaton....
     
  4. cybrfire

    cybrfire 1 ton status Vendor GMOTM Winner

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    I was thinking eaton. Never really seen one though and remembered the name from my chilton's manual. Looks like a good design. Wonder why they left it behind? No cover to rip off on rocks. Easy to gusset and beef up.
     
  5. JIMs70K25

    JIMs70K25 1/2 ton status

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    Well they were notorious for leaking, everywhere. Some came from the factory with a no-spin installed (detroit locker). Highest gears available 4.10s. 17 splines on the axle shafts but 1.5" in diameter. Dana 60s also came in the rear also, predominately in the GMCs.
     
  6. R72K5

    R72K5 Banned

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    everyone got it all right, the 3/4 ton version was the 5200lb FF

    yeah there was also a bearing problem with these, especially pinion bearings, ive seen quite a few that have tossed the bearings, its crazy, the last oen i saw with this problem was under a 70 3/4 ton,, however al the dually C30 ones(7200lb) ive never seen with any problems exceot for one guy down in NC who bought a '67 and it was dry and got so hot it was smoking on his trip back home with it, trying to think of his name but forgot, he is a member over on 67-72chevytrucks.com, i think it is harry, 5.13 ratio were in the R05 duallies, 4.57 was std equipment ratio 3/4 and 1 ton both.

    i take it that you know of a 72 C20 pickup somewhere ? for parts, or ?

    the term rockwell is used too much and by ppl who have no clue


    rockwell were way huge axles way biggger than anything like these little eaton FF's


    good luck
     

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