Identifying a rear end
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Senior User
Joined: Jun 2010
Posts: 133
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From: North Dakota
Identifying a rear end
Hey guys, straying here from the bullnose trucks section. I recently got the back half of a 70's pickup with a flatbed on it for my 84 F250 project. I literally got the entire back half of the truck cut off right behind the cab.
I used the bed for my project and have since scrapped the frame, but Im trying to sell the rear end, but need to identify it first. The guy I got it from told me it was from a late 70s 1 ton ford. He also told me that it was limited slip.
Can anyone identify this rear end for me?
Tag reads:
3 73 D41A BSA2
603530-3
I used the bed for my project and have since scrapped the frame, but Im trying to sell the rear end, but need to identify it first. The guy I got it from told me it was from a late 70s 1 ton ford. He also told me that it was limited slip.
Can anyone identify this rear end for me?
Tag reads:
3 73 D41A BSA2
603530-3
Fleet Owner
Joined: Dec 2009
Posts: 20,678
Likes: 82
From: NorCal
He lied... 'Seems every axle is equipped with Traction-Lok or Powr-Lok when it's put up for sale! Like every 360FE magically becomes a 390FE!!!
According to the BOM, it's a Dana 70 with open 3.73 gears from a 1974-75 F-250 Club Cab / F-350 Super Cab. It is listed on page 106 (paper) or page 112 (PDF) of this Dana reference manual: http://www2.dana.com/pdf/X510-
SD.pdf
According to the BOM, it's a Dana 70 with open 3.73 gears from a 1974-75 F-250 Club Cab / F-350 Super Cab. It is listed on page 106 (paper) or page 112 (PDF) of this Dana reference manual: http://www2.dana.com/pdf/X510-
SD.pdfLast edited by HIO Silver; Mar 31, 2012 at 04:03 PM. Reason: Disregard the smiley. The Dana PDF will open in a new window.
Thread Starter
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Senior User
Joined: Jun 2010
Posts: 133
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From: North Dakota
Awesome. That is EXACTLY the information I was looking for. I was told 373 gears, so atleast that was right. 
I know it was an f350 super cab so that is good to narrow down the year too.
Any clue what it might be worth as it sits there in the picture?
On a side note, just for my information... I always thought that (when completely off the ground) when you rotate one tire forward and the other tire spins backward, thats an open diff. If you spin one forward and the other one spins the same way, this is limited slip. Is this correct or not always?
I know it was an f350 super cab so that is good to narrow down the year too.
Any clue what it might be worth as it sits there in the picture?
On a side note, just for my information... I always thought that (when completely off the ground) when you rotate one tire forward and the other tire spins backward, thats an open diff. If you spin one forward and the other one spins the same way, this is limited slip. Is this correct or not always?
Fleet Owner
Joined: Dec 2009
Posts: 20,678
Likes: 82
From: NorCal
Awesome. That is EXACTLY the information I was looking for. I was told 373 gears, so atleast that was right.
I know it was an f350 super cab so that is good to narrow down the year too.
Any clue what it might be worth as it sits there in the picture?
On a side note, just for my information... I always thought that (when completely off the ground) when you rotate one tire forward and the other tire spins backward, thats an open diff. If you spin one forward and the other one spins the same way, this is limited slip. Is this correct or not always?
I know it was an f350 super cab so that is good to narrow down the year too.
Any clue what it might be worth as it sits there in the picture?
On a side note, just for my information... I always thought that (when completely off the ground) when you rotate one tire forward and the other tire spins backward, thats an open diff. If you spin one forward and the other one spins the same way, this is limited slip. Is this correct or not always?
LS issue.. you are correct - an open diff's wheels will spin opposite of each other.
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