furyus 67
Senior Member
Traded a buddy a #489 3rd member case with 2.76 open diff for this unit. Good deal?;)
Trade up?
- Thread starter furyus 67
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BigFury
Well-Known Member
Depends, a 489 is the strongest and most desirable out of the 3 8 3/4 rearend cases. Unless your putting slicks on with a 500 horse monster motor I doubt you'll break that 741. For street driving it ll hold up ok
furyus 67
Senior Member
3.91 gears in the sure grip. The one I traded was an extra I had from the newyorker.
Will you put them in your fury? they are a lot of fun.
furyus 67
Senior Member
That's the plan. I need to get the bugs worked out of the electrical system then the engine and then I'll throw this in.
Now were talking lol, Better hurry while there is Still some Warm weather left.
70bigblockdodge
Old Man with a Hat
You will not break it, if you do you da man, with a pretty fast C body
70bigblockdodge
Old Man with a Hat
I believe so, Dr. Diff has a whole run down sizes. I knew of one that ran mid 10s and had hundreds if not a thousand passes on it.
furyus 67
Senior Member
I doubt I'll ever run a single pass in the ole fury! Still nice to know I'll have grip if I do. I'm debating on putting a 3.55 on that sure grip and stuffing it in there. I'll probly run for the next summer tho.
BigFury
Well-Known Member
D
I did a similar deal with my buddy...I had a 2.76 SG in a 489 case and swapped for a 742 case with a 3.55 SG.. Good gear for a street car IMHO. You made a good trade..
furyus 67
Senior Member
I just looked under the fury and I've got a 489 case in it now! Maybe I'll take that 3.55 I have, slap it on the site grip and stuff it in that 489. Need to make sure they will swap tho.
twostick
Senior Member
Dr Diff comparison from Moparts.
http://www.moparts.org/Tech/Archive/axle/1.html
I don't think there is anything wrong with a 741 other than only a few gear choices available.
Kevin
http://www.moparts.org/Tech/Archive/axle/1.html
I don't think there is anything wrong with a 741 other than only a few gear choices available.
Kevin
Sure grips from a 741 I don't think will interchange with a 489.
furyus 67
Senior Member
Great information!! Thanks for sharing that link! But alas they are not interchangeabElle. Ah well still have a sure grip!
BigFury
Well-Known Member
Yea has to be the same case number... You'll be totally fine with that 741
70bigblockdodge
Old Man with a Hat
They will interchange you just have to switch the carrier bearings.
BigFury
Well-Known Member
My mistake... I thought the different pinion sizes dictated which housing you could swap. Honestly I've only switched cases in and out and never had one completely apart.
furyus 67
Senior Member
So the carrier bearings are case specific? Pinion gears make no difference?
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