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Where are the numbers on a rear diff on a 73 challenger?  
lemming303 lemming303
User | Posts: 50 | Joined: 09/08
Posted: 09/27/08
12:03 PM

I looked on the back like where it would be on a ford, but theyre not there. I'm trying to find out what gear it has in it without opening it up. Its still stock.  


'73 Dodge Challenger Rallye, 340 (Just found, first project)

 
shortbox81
New User | Posts: 5 | Joined: 07/07
Posted: 09/27/08
12:37 PM

there should be a tag on one of the bolts if not you might have to open it up to find out  


 
lemming303 lemming303
User | Posts: 50 | Joined: 09/08
Posted: 09/27/08
12:42 PM

I didn't see one. I haven't got the car back to my house yet, I won't get it for a few more days but when I did look I didn't see a tag.  


'73 Dodge Challenger Rallye, 340 (Just found, first project)

 
drmopar
Enthusiast | Posts: 456 | Joined: 02/08
Posted: 09/30/08
08:34 AM

Check the right hand side of the 3rd member of the 8 3/4 right behind the pinion. There is a number stamped right into the third member case. You may have to clean this area to see the number clearly.
The last 3 numbers are likely 489, this is the sought after third member with the larger pinion bearings.  


 
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