psychostang Posted February 16, 2020 Share Posted February 16, 2020 Here is a picture of the bottom of my rear axle housing. I can see that it is a 3.23 ratio. Does anyone know what the dash number means. Also, what does the "70" mean? TIA Link to comment Share on other sites More sharing options...
psychostang Posted February 23, 2020 Author Share Posted February 23, 2020 So does anyone have an idea as to what the dash number, and the"70" mean? Link to comment Share on other sites More sharing options...
first64riv Posted February 23, 2020 Share Posted February 23, 2020 I have the same 70 stamping on my diff. I hope someone chimes in. Link to comment Share on other sites More sharing options...
Rivdrivn Posted February 24, 2020 Share Posted February 24, 2020 Sorry, this is all I have in my files. Link to comment Share on other sites More sharing options...
RivNut Posted February 24, 2020 Share Posted February 24, 2020 Did anyone notice the ROA# of the author of the list? It's the way numbers used to be assigned. My number was originally 32790. 3 for a 1963, 279 for the numerical order in which I joined, and 0 for 10/October when it was time for me to renew. That would be kind of difficult now with member numbers with five digits, members with more than one car, and multiyear memberships. 🙂 Link to comment Share on other sites More sharing options...
psychostang Posted February 24, 2020 Author Share Posted February 24, 2020 Thanks Steve. It is actually a great help. Based on my picture and your info, you can see that this axle assembly is either a 63 or 64. The dash number would prolly tell me that. This confirms that the axle is not original to my car, as I have a 65. Next question: Is there any difference between the 1st gen axle assemblies? Link to comment Share on other sites More sharing options...
RivNut Posted February 24, 2020 Share Posted February 24, 2020 Is this axle housing complete? If so, there's a difference in the way the 63 and 64 rear ends connect to the drive shaft. It's been quite a while since I've been under either of my cars but if memory serves me correctly, the 63 driveshaft connects to the rear via a u-joint and the 64 driveshaft connects to the rear end via a flange. I may have some old pictures. If so, I'll see if I can find them and post them. If the axles are still in the axle housings, the left side of the 63 axle will have left hand threads on the studs. 64 will have right hand threads. Link to comment Share on other sites More sharing options...
RivNut Posted February 24, 2020 Share Posted February 24, 2020 (edited) That didn't take as long as I imagined. Here's a picture of a 63 driveshaft attached to the rear end. Notice that a U-joint is attached directly to the rear end. Here's a picture of a 64 drive shaft attached to the rear end. Notice that the constant velocity joint is attached to a flange which in turn is attached to the rear end. I've never seen either with the 63 U-joint or the 64 flange removed from the pinion spline but I think if those are removed, the rear ends are the same. Edited February 24, 2020 by RivNut (see edit history) Link to comment Share on other sites More sharing options...
psychostang Posted February 24, 2020 Author Share Posted February 24, 2020 It is complete and in the vehicle. Here are some pictures. Link to comment Share on other sites More sharing options...
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