Dana 60 identifacation
 

Can any one help decode these numbers and casting on this rear diff. I got an idea but not sure. Its complete with backing plates and 4 pin carrier. What value would this have. thanks marc. https://www.yenko.net/ubbthreads/pics...1-dsc_0132.png
https://www.yenko.net/ubbthreads/pics...2-dsc_0133.png
https://www.yenko.net/ubbthreads/pics...-dsc_01351.png
https://www.yenko.net/ubbthreads/pics...4-dsc_0131.png

Re: Dana 60 identifacation
 

Can you provide the backing plate-to-backing plate width measurement please? 8 25 69 is a good sign as it is a Dana 60 for a 1970 or 1971 Dodge or Plymouth - it was assembled August 25, 1969. But 1969 assembly dates have been documented in 1971 model year cars. The width nails down whether it was put in a B body or E body.

Re: Dana 60 identifacation
 

The stamped numbers are the assembly date (sometimes there are 2) and the usage codes.

Here are the usage codes.........

Bill of Materials Numbers:
68-69 B body 3.54 Powr-Lok 602957-1, -2, -3, -4
4.10 Powr-Lok 602957-5, -6
69.5-70 B body 3.54 Powr-Lok 603109-1, -2
4.10 Powr-Lok 603109-3, -5

70-72 B body 3.54 Trac-Lok 603222-1, -2
4.10 Trac-Lok 603222-3

Re: Dana 60 identifacation
 

I can't quite make out the number on your pic.....I see 6031xx

If it is none of the above it would be for an E-body. Here is the list including e-body.

Bill of Materials Numbers:
68-69 B body 3.54 Powr-Lok 602957-1, -2, -3, -4
4.10 Powr-Lok 602957-5, -6
69.5-72 B body 3.54 Powr-Lok 603109-1, -2
4.10 Powr-Lok 603109-3, -5
4.56 Powr-Lok 603109-6, -7, -8
70-72 B body 3.54 Trac-Lok 603222-1, -2
4.10 Trac-Lok 603222-3
4.56 Trac-Lok 603222-4
75-77 B body 5.13 Powr-Lok 603347-2
5.38 Powr-Lok 603347-1
69-71 E body 3.54 Powr-Lok 603080-1, -2, -4
4.10 Powr-Lok 603080-3, -5
4.56 Powr-Lok 603080-6, -7
70-72 E body 3.54 Trac-Lok 603226-1, -2
4.10 Trac-Lok 603226-4

Re: Dana 60 identifacation
 

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: RS_COPO_Canuck</div><div class="ubbcode-body">I can't quite make out the number on your pic.....I see 6031xx </div></div>

603109-2, possibly an A12 rear

Re: Dana 60 identifacation
 

I am going to measure backing plate to backing plate, also this rear does not have a oil plug drilled and tapped into it.Thanks a bunch for the info provided.

Re: Dana 60 identifacation
 

66-67 and some 68's had a drain plug on the housing.....none did after that.

Re: Dana 60 identifacation
 

603109-2....70-72 and up B-Body, 3.54 Powerlock. The dash number for an A12 car would have been -3 or -5, not the -2, for the 4.10 gears. Built too late to be an A12 rear, anyway. An A12 rear would have been around February or April, plus or minus a bit based on build date of the car. That's just a rough estimate, but the date on your rear is too late, and A12s only came with 4.10 gears as well. Hope that helps! [img]<<GRAEMLIN_URL>>/biggthumpup.gif[/img]

Re: Dana 60 identifacation
 

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: A12pilot</div><div class="ubbcode-body">603109-2....70-72 and up B-Body, 3.54 Powerlock. The dash number for an A12 car would have been -3 or -5, not the -2, for the 4.10 gears. Built too late to be an A12 rear, anyway. An A12 rear would have been around February or April, plus or minus a bit based on build date of the car. That's just a rough estimate, but the date on your rear is too late, and A12s only came with 4.10 gears as well. Hope that helps! [img]<<GRAEMLIN_URL>>/biggthumpup.gif[/img] </div></div>

Right you are, the A12 were batch cars....forgot about that. Isn't the '71-'72 fuselage body B-bodies fitted with a wider Dana than the '70 b-body though - by a couple inches?

Re: Dana 60 identifacation
 

Correct. The perch mounts are different as are the hub to hub measurements between the 70 B-Bodies and the later years. Measuring the widths will tell you which year it'll fit. Why they are classified in the same group, I don't know. I could make something up that sounds cool, but I'm not that smart [img]<<GRAEMLIN_URL>>/dunno.gif[/img] [img]<<GRAEMLIN_URL>>/hmmm.gif[/img]

Cheers