'76 Cab & Bed replacement
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Junior User
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Not to change the subject but what rear axle do I have? The door tag says 23J. But keep in mind, the door tag is a 2wd F250, so it may not be the same axle since this is a 4x4.
23
'74-'79 3.31 5.3M Dana (Spicer) 61
But I always remember dad telling me it had 4.10 or taller and do remember the speedometer was way off with standard tires. I do know it's an open diff.
On the axle itself, I see. "C 30255" , "60", and I believe " A12378".
Thank you!
23
'74-'79 3.31 5.3M Dana (Spicer) 61
But I always remember dad telling me it had 4.10 or taller and do remember the speedometer was way off with standard tires. I do know it's an open diff.
On the axle itself, I see. "C 30255" , "60", and I believe " A12378".
Thank you!
Laughing Gas
Joined: Mar 2003
Posts: 789
Likes: 7
From: Durham, NC
If the "60" is stamped in large letters on the triangulation ear at the bottom between the center section and axle tubes then you have a Dana 60 which is most common.
Look for a tag attached by 2 center section cover bolts. It will have your ratio.
Or... Tie string on yoke, push / drive truck one full tire rotation, count how many times string wrapped. Also take note the location of yoke. If string wraps a tad more than 4 times then you have 4.10.
Look for a tag attached by 2 center section cover bolts. It will have your ratio.
Or... Tie string on yoke, push / drive truck one full tire rotation, count how many times string wrapped. Also take note the location of yoke. If string wraps a tad more than 4 times then you have 4.10.
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Junior User
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If the "60" is stamped in large letters on the triangulation ear at the bottom between the center section and axle tubes then you have a Dana 60 which is most common.
Look for a tag attached by 2 center section cover bolts. It will have your ratio.
Or... Tie string on yoke, push / drive truck one full tire rotation, count how many times string wrapped. Also take note the location of yoke. If string wraps a tad more than 4 times then you have 4.10.
Look for a tag attached by 2 center section cover bolts. It will have your ratio.
Or... Tie string on yoke, push / drive truck one full tire rotation, count how many times string wrapped. Also take note the location of yoke. If string wraps a tad more than 4 times then you have 4.10.
Thanks! I'm assuming this axle was also used on the '76 f250 2wd's?
Laughing Gas
Joined: Mar 2003
Posts: 789
Likes: 7
From: Durham, NC
Yes. Only differences were center section had more triangulation (on the outside) towards the cone on the '76. Exact same innards from hubs, shafts to gears from like 73 up to today. About 77-78 the cone got more slick. Very obvious change.
Take a pic of the rear end cone towards the yoke and I can tell you if it's a 76 or later.
There were slight variations with the locking nuts on the hubs between the two but same principal and totally interchangeable.
Also, there was a rare Dana 61 that used different gears and was different all together. I'm unfamiliar with the D61 for I've never even seen one. I would imagine the stamp would be "61" in big letters though???
Take a pic of the rear end cone towards the yoke and I can tell you if it's a 76 or later.
There were slight variations with the locking nuts on the hubs between the two but same principal and totally interchangeable.
Also, there was a rare Dana 61 that used different gears and was different all together. I'm unfamiliar with the D61 for I've never even seen one. I would imagine the stamp would be "61" in big letters though???
Laughing Gas
Joined: Mar 2003
Posts: 789
Likes: 7
From: Durham, NC
That's slightly different than the typical 76 F250 4wd rear. Similar but plenty different. I've never seen this axle before nor have I ever seen a 76 2wd Dana 60 so could be a 2wd version??? No help here...
Definitely not a 78/79 or a 4WD 76 f250 though.
There's a BOM (Bill of Material) number stamped into the top of the axle tube that you can look up on the Dana site that would tell you everything except what lunch the builder ate that day.
Dana Holding Corporation - The Expert Axle Bill of Material
Dana 60 BOM Numbers | Dana 60 Identification
Definitely not a 78/79 or a 4WD 76 f250 though.
There's a BOM (Bill of Material) number stamped into the top of the axle tube that you can look up on the Dana site that would tell you everything except what lunch the builder ate that day.
Dana Holding Corporation - The Expert Axle Bill of Material
Dana 60 BOM Numbers | Dana 60 Identification
Laughing Gas
Joined: Mar 2003
Posts: 789
Likes: 7
From: Durham, NC
I take that back. This looks like a 78/79 F250 rear. Here's some good reading to help.
Mr.N's Dana Article
Mr.N's Dana Article
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Laughing Gas
Joined: Mar 2003
Posts: 789
Likes: 7
From: Durham, NC
Check out the second pic on the left of the article I last posted. There you see a very greasy front and rear paired together from a 78/79. Your axle looks like the rear axle from that picture.
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Junior User
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Great, I'll check it out and could very well be that whomever modified this truck had a 78/79 4x4 but the matching rear frame stamp and door tag show a '76 f250.
So is the BOM always on the top / passenger side of the rear axle?
Second question, if it's a 78/79, 4x4 parts, it's technically not a 'high boy'?
I found the tag on my front axle but the lookup doesn't find anything but there is a "44" stamped on the case.
It's a 4.09 ratio
D8TA AAE
603782-1
Laughing Gas
Joined: Mar 2003
Posts: 789
Likes: 7
From: Durham, NC
"highboy" has been covered so much it ain't funny... If it has a divorced t-case stock then you have a highboy no matter what running gear you have.
1976 Highboys had low pinion disk brake front D44HD. Exactly what you got.
1976 Highboys had low pinion disk brake front D44HD. Exactly what you got.
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Yes, it has the divorced transfer case.
I've looked on the rear axle tube, cleaning with a brass wire wheel and haven't been able to locate the BOM. Is it normally on the passenger side of the dif and on top, back, front?
I've looked on the rear axle tube, cleaning with a brass wire wheel and haven't been able to locate the BOM. Is it normally on the passenger side of the dif and on top, back, front?
Laughing Gas
Joined: Mar 2003
Posts: 789
Likes: 7
From: Durham, NC
Welp, I just found out that Dana BOM's only went back to 1979.
Your best bet is to re-post with a similar thread title. Not too many dana 60 rear guru's cruising how to replace a cab and bed. Think there's actually a rear end section???
I can't believe I stumbled on your thread and by chances I continued for I do know a little bit about Dana's. But you have exercised every bit of my knowledge Nitro...
Good luck! I'd just run it and not worry about what I had. LOL
Your best bet is to re-post with a similar thread title. Not too many dana 60 rear guru's cruising how to replace a cab and bed. Think there's actually a rear end section???
I can't believe I stumbled on your thread and by chances I continued for I do know a little bit about Dana's. But you have exercised every bit of my knowledge Nitro...
Good luck! I'd just run it and not worry about what I had. LOL
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