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My rear end.


Frank Elder

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:eek:

What is the actual designation for my D-24 rear end ? I know it is a semi floating, hypoid rear end with 3.9 to 1 gears and tapered axles.......and it looks similar to a more modern 8 3/4 rear, but it is not an 8 3/4.

Do I have to pop one open [ I have an extra] and measure the ring gear to see what size it is?

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I hope it's OK.

  • Haha 1
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I am not sure they make a 7 1/4 anymore now that most RWD cars have driven off into the sunset.  Sure a few are being revived now and the truck still continued a few models.  I am not certain the diff used in modern RWD but would figure a 8 1/4 derivative.   The 8 1/4 is an able street gear unless you are totally off the wall pro street....for the mild mannered or warmed over V8 they will handle their own.  the 8 3/4 of b-body and muscle car era fame be it in any of the three pinion sizes or taper/flanged axles are just too off the wall in cost these days.  Oh one can get lucky and find a good unit if he shakes the bushes.....but the average knowing Mopar owner will not let these go cheap....

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Went out to the garage and perused my parts list book, looks to be 8.25 rear end.

Page 46

Part type code 3-19-5

GEAR, Axle drive---3.9 to 1 ratio

[standard with fluid drive]

39 teeth 4.782 I.D. x 8.250 0.D.

Formate type

club coupe

P.N. 953 591

 

Edited by Frank Elder
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1 hour ago, Frank Elder said:

I don't need to purchase a rear end, I have 3 D-24 rears with 3.9s just curious to the actual size of it......will it be a 7 or 8 inch variant. Quite honestly I thought the man with the spotted dog might know......

I don't know a thing about 7-1/4,  8-1/4, 9 Ford's etc.  Done seals in them...Don't have a clue about interchange.

As for a 3.36, 3.54, 3.58, 3.73, 3.9, 4.1, 4.3, 4.89, 5.83-8.11 6.64-9.18 and 6.42-8.38...know plenty about those but not about ring gear size as to me it never been needed knowledge.

Never owned a more modern Mopar with a 8-3/4 rear end.

Everything I own in old Mopars is 1953 and older.?

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13 minutes ago, Frank Elder said:

8.38..........good woobly goobly:eek:

8.38 is the high range gear of a Eaton 1350 2 speed rear axle...optional on 1-1/2 to 2 ton trucks?

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