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Rear

Data Plate

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A guy by me is selling he said it’s a 8 3/4 rear section but the part number is 1634985 and a date code A24 I’ve seen 741 742 and 489 but never a 985 anybody know what it’s from
 
A guy by me is selling he said it’s a 8 3/4 rear section but the part number is 1634985 and a date code A24 I’ve seen 741 742 and 489 but never a 985 anybody know what it’s from
Used 57-64
 
Would it work ok in a 69 charger
Depends on what it came out of. Is the whole rear end or just the third member? I'm thinking third member since you said section. I heard the center thrust pin is a different size than the others so....not sure. Never messed with the 'really old' stuff :D
 
Agree. Need to know what it came from if you want to use the complete rear. If only the pumpkin , should not be a problem.
The 742 equivalent is a very good unit.
Here are some dimensions:

http://www.moparts.org/Tech/Archive/axle/16.html

Casting numbers 2070742 (used from 1961-1969) and 1634985 (used from 1957-1964) identify the 1 3/4-inch-diameter 10-spline pinion shaft, and are commonly referred to as the "742" case
 
985 was in my 57 Coronet before I swapped in a more modern axle. Sorry... cannot can't add any help about compatibility of 985 with more modern yokes and axles.
 
If its got tapered axles (64 and under) pass on it.
Well, that shouldn't matter to the 3rd member but like I mentioned eariler, I've read/heard that the center thrust pin was different (shorter?) than the other 3rd members.....
 
That 985 is like a 741. 8 3/4, small pinion shaft. It would be good behind street small block. Still stronger than any Chev rear end.
 
Thanks for all the helpful info I’m gonna pass on it he wants like 800 which I thought was high has 456 gears in it to steep for me anyway
 
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