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Will a 7 1/4 rearend from a Dodge Diplomat fit in a Plymouth
https://www.slantsix.org/forum/viewtopic.php?t=15011
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Author:  timoteo [ Sat Nov 12, 2005 5:42 pm ]
Post subject:  Will a 7 1/4 rearend from a Dodge Diplomat fit in a Plymouth

I just wanted to know if a rearend that is a 7 !/4 fit going from a 79 Dodge Diplomat to a 77 Plymouth Volare. Does anything special need to be done?

Author:  SlantSixDan [ Sat Nov 12, 2005 5:55 pm ]
Post subject: 

Yep, direct swap. The ratio may be different, though, which would require changing the speedometer drive pinion and would affect the car's performance and mileage.

Author:  timoteo [ Sun Nov 13, 2005 12:49 pm ]
Post subject:  rearend question

Both the 77 Plymouth Volare and the Dodge Diplomat have 318 cu. in motors. Would they both not have the same ratio? I have a 7 1/4 in my slant 6 77 Plymouth Volare. I own both a slant 6 and a 318 cu. in Volare. One is a two door and the other a four door Primiere. I hope they both have the same ratio.

Author:  SlantSixDan [ Sun Nov 13, 2005 2:02 pm ]
Post subject:  Re: rearend question

Quote:
Both the 77 Plymouth Volare and the Dodge Diplomat have 318 cu. in motors. Would they both not have the same ratio?
Maybe, maybe not. Remember, these cars are approaching 3 decades old, so even if they started out with the same ratio, they don't necessarily have it now.

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