Rear

[Data Plate]

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

 

[Don67Satellite]

Another thread discussing 985. Seen a thread on FABO that said 1957-1964. Myself, not sure. Hope this helps.

 

[pnora]

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

 

[Don67Satellite]

And something from Hemmings.

 

[Data Plate]

Would it work ok in a 69 charger

 

[Cranky]

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

 

[MoparLeo]

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

 

[#41]

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.

 

[MCODECUDA]

If its got tapered axles (64 and under) pass on it.

 

[Cranky]

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.....

 

[R/T Boy 67]

Pre 65 sure grips and all 65 up 8 3/4 rears had the same length thrust pin. Pre 65 open diffs were different.

 

[Cranky]

Pre 65 sure grips and all 65 up 8 3/4 rears had the same length thrust pin. Pre 65 open diffs were different.

Got it!

 

[Joshmopar11x]

We have one in a 450hp truck. Never an issue

 

[Dave6T4]

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.

 

[MoparLeo]

Incorrect. 741 has a 1 3/8" pinion. 742 has a 1 3/4" refer back to post number 7.

 

[Data Plate]

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