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 Rear Axle Info?

Discussion in 'The Garage' started by OrangeCrushK10, Oct 29, 2004.

  1. OrangeCrushK10

    OrangeCrushK10 1/2 ton status

    Joined:
    Jan 25, 2003
    Posts:
    1,425
    Likes Received:
    0
    Location:
    Square State + Suspension Item
    So, give me some info/comments on these baby's! I saw one almost fully diconnected at the pull'n'save so I grabbed it. While I wanted a 14-bolt, any 1 ton would work and I didn't have to do but 10 minutes of labor to get it out.

    So, I've figured out it's an Eaton out of a '72 pickup.

    Most Eaton's have lockers I've read, which is awesome.

    How do I tell what gear ratio it has and if it has a locker in it?

    What else about these rear ends? Gimme Info Guru's! /forums/images/graemlins/bow.gif
     
  2. pauly383

    pauly383 Daddy383 Staff Member Moderator

    Joined:
    Jul 22, 2001
    Posts:
    16,217
    Likes Received:
    1
    Location:
    Mesa , Arizona USA
    Well you are going to change the fluid and do the brakes and such , right ? Well just pull the axles and the third member and find out before you refill it and use it /forums/images/graemlins/thumb.gif
     
  3. pauly383

    pauly383 Daddy383 Staff Member Moderator

    Joined:
    Jul 22, 2001
    Posts:
    16,217
    Likes Received:
    1
    Location:
    Mesa , Arizona USA
    I am searching the net since I am curious , and on fourwheeler.com they say they came with 4.57's or 5.14's for gears , and they mostly came with Detroits which are discontinued now from Tractech /forums/images/graemlins/k5.gif /forums/images/graemlins/k5.gif
     
  4. jac6695

    jac6695 1/2 ton status

    Joined:
    May 2, 2002
    Posts:
    1,860
    Likes Received:
    0
    Location:
    Christiansburg, VA
    Where did you get it?

    Here is what I have learned of the Eaton:
    The Eaton came in two versions, a drw and srw, the drw being a couple of inches narrower. Gear ratios are limited to 4.10, 4.56, and 5.13 (mostly in DRW versions). 14BFF Detroit lockers fit into the carrier and 14BFF axels will work in the Eaton housing. The disk brake brackets will work, also.

    Let me know if you decide not to use. I will probably buy it from you. /forums/images/graemlins/thumb.gif
     
  5. 1gmc4x4

    1gmc4x4 Newbie

    Joined:
    Sep 7, 2004
    Posts:
    3
    Likes Received:
    0
    Location:
    san jose, ca
    they interchage with 14Bolt stuff? will 14b stuff work with Eaton? I have one but I have no use for it being that im using a 14Bolt
    /forums/images/graemlins/truck.gif
     
  6. protechk5

    protechk5 1/2 ton status

    Joined:
    Sep 26, 2004
    Posts:
    2,015
    Likes Received:
    0
    Location:
    VA
    does anyone have a picture of this rear end?
     
  7. jac6695

    jac6695 1/2 ton status

    Joined:
    May 2, 2002
    Posts:
    1,860
    Likes Received:
    0
    Location:
    Christiansburg, VA
    Yes, some parts will interchange, msotly just the axles and locker. The ring and pinion (which I do not think is made anymore) is different, with a slightly smaller (something like 10 1/8" or so) ring gear, which helps to give about 1 1/2" clearance under the diff. The Eaton axle shafts are 19 spline I believe. There is a lot of info over on Pirate. I believe that 14BFF SRW axles fit in place of the Eaton SRW axles.
     
  8. 70~K5

    70~K5 1/2 ton status

    Joined:
    Apr 13, 2002
    Posts:
    2,032
    Likes Received:
    0
    Location:
    sillycon valley
    [ QUOTE ]
    Yes, some parts will interchange, msotly just the axles and locker. The ring and pinion (which I do not think is made anymore) is different, with a slightly smaller (something like 10 1/8" or so) ring gear, which helps to give about 1 1/2" clearance under the diff. The Eaton axle shafts are 19 spline I believe. There is a lot of info over on Pirate. I believe that 14BFF SRW axles fit in place of the Eaton SRW axles.

    [/ QUOTE ]

    If you use 14BFF axles then you need the side gears or DL for a 14BFF.
     
  9. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

    Joined:
    Mar 5, 2001
    Posts:
    15,683
    Likes Received:
    1,392
    Location:
    642 Days to BB2018
    Nick,

    I have one in my '72 Suburban, and I will give you some advice that you will be VERY happy to have....

    1. If you are used to working with 14BFFs, you will see what you believe is a fill plug up near the pinion area. It's a square-headed bolt head, but when you back it out, it actually turns out to be about 4 inches long! It also turns out NOT to be the fill plug, but the bolt that sets pinion pre-load...so then you need to call a buddy with an Eaton shop manual to come over late at night and help you figure out how to get it set correctly, so that you can leave for BlazerBash the next day.....

    2. The diff cover bolts are "through bolts" into the pumpkin. If you pull the bottommost bolt, gear oil WILL start coming out. You can change the fluid this way and save yourself the trouble of pulling the cover, by just removing about 3 lower bolts. The problem with the Eaton covers is that they are HARD to seal from leaks. I spent a LOT of time meticulously cleaning both surfaces and using a correct gasket with no gasket sealer (the factory supposedly didn't use any) and the freaking thing leaked like a seive! I tried sealing the threads on the bolts and that didn't solve the leaks either. Finally, I just gave up on the whole gasket thing and used that Permatex "Right Stuff" gasket maker (which is AWESOME btw) and drew a gasket onto the back of the cover and reassembled everything. It hasn't leaked a drop of oil since.


    Well there you go....a few Eaton BTDT stories to help you along. /forums/images/graemlins/waytogo.gif
     
  10. Yukon Jack

    Yukon Jack 1/2 ton status

    Joined:
    Jul 25, 2002
    Posts:
    1,984
    Likes Received:
    0
    Location:
    Rose Hill, KS
    Here's a pic of my Eaton H052 in my 69 K20. 4.57 gears with factory Detroit.
    [​IMG]
     
  11. atho

    atho 1/2 ton status

    Joined:
    May 14, 2003
    Posts:
    1,115
    Likes Received:
    0
    Location:
    Wayne County, Ohio
    sweet! I decided to go the Eaton route myself, mostly because it is just as strong (if not stronger) than the 14 bolt, and it is something a little different and cool.

    some things to consider:
    eatons did not ALL get Detroit Lockers. they were a factory option from GM (G86 No-Spin). They are identical to 14 bolt detroit locker's except for the spline count (17 for the Eaton vs. 30 for 14bff). They also have the dropout third member which makes gear swaps easier. Some of the diffs have the pinion load bolt which helps prevent the pinion gear from deflecting under load (strong), however not all of these axles have this. They also have 3 pinion support bearings like a 14 bolt. The housing is made of sheetmetal, so it is a bit lighter and easier to weld to, and no axletubes to separate from the diff. They have more ground clearance than a 14b, and iirc can be shaved for even more if you so choose. There are a couple guys on Pirate who bought a 12" sch 40 sewer pipe cap and welded it on as a diff cover, a lot stronger than stock.

    Right now I am working on making my own hybrid. I bought a complete H052 from a '66 C20, with 4.57 gears and a Detroit, for $100. It does not have the load bolt, however I bought a complete third member from a H072 originally under a '68 C30 motorhome, it has 5.14 gears, the load bolt, and only 28,000 orig. miles for $50. I am on the lookout for a cheap used 14 bolt detroit and a set of 14b axleshafts to complete the package.
     
  12. OrangeCrushK10

    OrangeCrushK10 1/2 ton status

    Joined:
    Jan 25, 2003
    Posts:
    1,425
    Likes Received:
    0
    Location:
    Square State + Suspension Item
    Okay, I know I'm gonna ask a TOTAL Newb question here, but How do you tell what size the gears are by looking at them?

    I've never really done that before, so time to learn!

    Also I found almost this exact post has been done before, just search for it.

    I got this rear end at the Pull'N'Save in Aurora (www.pullnsave.com). I paid almost $70, which kinda sucked, but since I had to do almost no labor to get it I didn't complain too much.

    These Rear's sound pretty cool. I definetly think I'm going to keep it. I like things that are a little different anyways. /forums/images/graemlins/grin.gif
     

Share This Page