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WTB: R180 Differential

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Hello...I'm looking for an R180 Differential with a higher gear ratio. I swapped in a 5 speed to my '73 and not only is it slow, but my current rear end whines like a SOB when decellerating. I have read that all AUTOMATIC Z's used a 3.54 rear end, whereas the 4 Speeds used a 3.37. I was looking for something a bit steeper, but would accept the 3.54 if it didn't have the concerning whine. Any help would be appreciated. Ryals in north Georgia BTW...I do NOT expect to get a good diff for $100...I had to enter some number in that box in order to publish the ad.

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• Advertiser
  Tirnipgreen
• Date
  08/01/2023
• Price
  $100
• Category
  Parts Wanted
• Year
  1973
• Model
  240-Z

 

Edited August 1, 20231 yr by Tirnipgreen

Is this near you? 

The VIN tag will tell what ratio is in the truck. 39 41 or 43 = 3:90 4:11 and 4:38

You have to swap out the clip in stub axles on some others have the bolt in style which is easier to swap.