Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

Eaton ignorant.........

Discussion in 'The Garage' started by dontoe, Jan 23, 2007.

  1. dontoe

    dontoe 3/4 ton status GMOTM Winner

    Joined:
    May 7, 2004
    Posts:
    9,070
    Likes Received:
    0
    Location:
    Hickory, N.C.
    From what I've read here, I want an Eaton rear to replace my 12b.

    1. Anyone have some good pics to go by when looking for one?

    2. What years and models of trucks are the ones I want to look at?

    3. Any other info about swapping to 14BFF axles, carrier, etc.
     
  2. ryan22re

    ryan22re 1/2 ton status

    Joined:
    Feb 5, 2005
    Posts:
    3,368
    Likes Received:
    0
    Location:
    Irmo, SC
    Georgia Gabe runs one. And I think Hoodrich too. Maybe shoot them a PM with your questions.
     
  3. Hossbaby50

    Hossbaby50 3/4 ton status

    Joined:
    Sep 1, 2001
    Posts:
    8,972
    Likes Received:
    0
    Location:
    Peoria, AZ
    I believe Eaton rears came in '72 & older 3/4+ton Chevy trucks. They basically look like a big Ford 9" except they have a removable round cover on the backside of the axle. Why an Eaton over a 14bff? I can see it if you already have the Eaton or it is free but to me it would seam easier & cheaper to just do a 14bff.

    Harley
     
  4. dontoe

    dontoe 3/4 ton status GMOTM Winner

    Joined:
    May 7, 2004
    Posts:
    9,070
    Likes Received:
    0
    Location:
    Hickory, N.C.
    IIRC, they have better clearance than a shaved 14bff.......
     
  5. Hossbaby50

    Hossbaby50 3/4 ton status

    Joined:
    Sep 1, 2001
    Posts:
    8,972
    Likes Received:
    0
    Location:
    Peoria, AZ
    It probably depends on how much you are willing to shave your 14bff. The eaton may be smoother then a 14bff & offer some extra clearence but not much I wouldn't think. The ring gear is still going to be pretty large in an Eaton so it will sit below the axle centerline at a similar height as a 14bff.

    Harley
     
  6. GotLabs

    GotLabs 1/2 ton status GMOTM Winner

    Joined:
    Jul 30, 2005
    Posts:
    2,795
    Likes Received:
    0
    Location:
    Transient, USA
    Check yo PM's.
     
  7. 79k20350

    79k20350 3/4 ton status

    Joined:
    Nov 22, 2004
    Posts:
    7,757
    Likes Received:
    1
    Location:
    Ct
    Not the case.

    A eaton can be shaved for more clearance than a d44.

    If i remember correctly its 1-2" stock
     
  8. '71k204x4454

    '71k204x4454 Registered Member

    Joined:
    Dec 28, 2004
    Posts:
    60
    Likes Received:
    0
    Location:
    Hood River Or
    Try to find one with a No-spin in it since you can not buy a new one. You can change one out pretty easy but you would still have to find a third memeber with a No-Spin used. The gear ratio is pretty limitted (3:90, 4:10 and 4:56. IIRR) and some people say you can still get new gears for them but I have never seen any avilable.
     
  9. dontoe

    dontoe 3/4 ton status GMOTM Winner

    Joined:
    May 7, 2004
    Posts:
    9,070
    Likes Received:
    0
    Location:
    Hickory, N.C.
    Can't ya swap in 14bff axles and carrier?

    Anyone done that?
     
  10. Hossbaby50

    Hossbaby50 3/4 ton status

    Joined:
    Sep 1, 2001
    Posts:
    8,972
    Likes Received:
    0
    Location:
    Peoria, AZ
    I know Supersize75 had an eaton w/14bff stuff in it.

    Harley
     
  11. iwaxmyjimmy

    iwaxmyjimmy College web wheeler Premium Member

    Joined:
    Nov 3, 2006
    Posts:
    2,802
    Likes Received:
    34
    Location:
    Greenville NC
    u can swap to a 14 bolt detroit and use 14 bolt shafts. thats all
     
  12. REDCRO_REDNECK

    REDCRO_REDNECK 1/2 ton status

    Joined:
    Apr 7, 2005
    Posts:
    241
    Likes Received:
    0
    Location:
    mo
    an eaton axle is lighter than a 14 bolt.

    from my experiance the axle housing is similar from 49 to 72 the later hubs make it wider 63 vs 65
     
  13. GEORGIA GABE

    GEORGIA GABE 1/2 ton status

    Joined:
    May 25, 2005
    Posts:
    1,070
    Likes Received:
    0
    Location:
    Conyers, ga
    I love my eaton, I have not shaved it yet. And it came stock with 456s and a detroit. I have a spare set of shafts for it so I prolly wont be changing to 14bolt stuff.

    here is a pretty good writeup on shaving an eaton from pirate

    http://www.pirate4x4.com/forum/showthread.php?t=378622

    also some good info from right here at home

    http://www.coloradok5.com/forums/showthread.php?mode=hybrid&t=144838

    IMO it is the better choice than the 14bolt for a few key things... stock it has better clearance and will slide easier over rocks. Shaved it has way better clearance and it is easily done since the housing is not cast. If you ever decide to 4 link it will be easier with the eaton because you can weld directly to the top of the housing without building a truss bc its not cast.

    I like mine... its different... it works

    gabe

    ps... I also like the big red cover ... dont know why I just do
    [​IMG]
    [​IMG]
     
  14. diesel4me

    diesel4me 1 ton status Premium Member

    Joined:
    Jul 24, 2003
    Posts:
    17,540
    Likes Received:
    925
    Location:
    Massachussetts
    I think I have one??...

    I have a '62 GMC C-20 chassis that was made into a trailer out in my yard--I thought it had an Eaton rear axle--it has coil springs,truck was a 3/4 ton 2wd...axle has 4.56 gears according to the tag (still there 45 years later!:eek1: )..it has full floating axles...but the rear "cover" isn't removable,if I remeber right it was welded right into the housing,and the carrier drops out from the front like a 9" ford rear would..

    But reading this post,I see the Eaton ones pictured have a removeable diff cover??...maybe mine is a spicer or some other weirdo??.or did some have removeable covers,and some didn't?...:confused:
     
  15. Tominator II

    Tominator II 1/2 ton status

    Joined:
    Nov 5, 2005
    Posts:
    280
    Likes Received:
    0
    Location:
    South Park CO 80440
    I run 2 of them,a 4.56 with a nospin diff and a 4.10 with nospin diff. I have another 3rd member for 1 with 5.14 gears and have been told a 14b detroit will fit but havent tried it yet. I have a 14b with a Detroit so I am going to look into it. The Eaton axleshafts are 17 spline but I hammer the crap out of them in my Plow/tow truck with 454/465/205 and have not broken them in over 15 years of abuse. They are in 50s through early 70s GM 3/4 and 1 ton Pickups. I also have 1 in my 77 Jimmy that is on its 3rd set of 36+ inch tires.Pictures of the trucks they are in are in my gallery.
     
    Last edited: Jan 25, 2007
  16. Drey

    Drey 3/4 ton status

    Joined:
    May 8, 2003
    Posts:
    8,288
    Likes Received:
    0
    Location:
    Iowa
    I think some had removeable rear covers and some were welded. I beleive the older ones were welded
     
  17. 1967k10

    1967k10 1/2 ton status

    Joined:
    Nov 21, 2005
    Posts:
    1,728
    Likes Received:
    0
    Location:
    Nebraska looking for D60's
    All GM Eatons have removable diff covers.I've seen dozens from the 47' up to 72'. 71' and 72' have 9/16" studs where the older ones have 1/2" studs :rolleyes: . IH had a similar diff that doesn't. I'm running one in my Truggy and will continue to run them. They are tough and shaved the provide incredible clearance. I shaved one,then sold it. Shafts are 17spline and seem to be tough. I know of a couple guys in WA State that are running them behind 500HP 454's on 44"s and they're holding up well. A 14bolt Detroit and shafts will fit. There was a guy on Pirate trying to mod a carrier to fit a 14bolt ARB which I'd really like :D . I run a 14bolt disc conversion on mine. Fits perfect.
     
  18. iwaxmyjimmy

    iwaxmyjimmy College web wheeler Premium Member

    Joined:
    Nov 3, 2006
    Posts:
    2,802
    Likes Received:
    34
    Location:
    Greenville NC
    also the 5.13 gears for them are hard to find
     
  19. Moody

    Moody 1/2 ton status

    Joined:
    Aug 4, 2005
    Posts:
    232
    Likes Received:
    0
    Location:
    Yakima, WA
    I've learned alot about these axles over the last year after swapping one out of a 72 Cheyenne to go in my 70 Blazer. I've got a 4.10 gear set with the factory no-spin. Brake parts are very difficult to find and expensive when available. I'm doing a rear disc conversion on mine and with disc brake brackets from Ruff Stuff. Some stuff is interchangeable with 14ff. With an open rear you can swap a 14 bolt detroit with 14 bolt rear axles. Like mentioned earlier the eatons only have 17 spline axles but mine show almost no wear after 35 years. I have acquired an extra set of axles in the event I ever break any. I know the pinion diameter is 2" just like a 14 bolt but not sure of the spline number. I would like to upgrade to a 1410 yoke but I am still checking. I've heard they go through pinion bearings quickly, but others have stated they haven't had any problems. Removeable center section makes it easy to change gears and sure makes it easy to move the axle housing around when empty!

    blazer progress 007.jpg

    blazer progress 010.jpg
     
  20. Hossbaby50

    Hossbaby50 3/4 ton status

    Joined:
    Sep 1, 2001
    Posts:
    8,972
    Likes Received:
    0
    Location:
    Peoria, AZ
    What is the ring gear diameter & axleshaft diameter in an Eaton?

    Harley
     

Share This Page