Daly
Member
The 8 1/4 in my Duster is screwed. At some point someone lost a bearing cap and put a miss matched one in with shims between it and the bearing races. So I've decided to start looking for an 8 3/4 yo replace it. I had thought about a Fors 8.8, but decided to keep it mopar, for nothing more than resale (if I ever decide to sell).
Anyway on to the info I'm looking for. I've found a 8 3/4 housing with backing plates for $250cdn. And a complete, minus one drum, for $600cdn. Both out of 68-70 cars, the complete rear has high way gears and an open diff. Both will need to be rebuilt.
A few questions:
1. Will a 741 and 489 carrier work in the same housing. Or do they have different spline counts. I guess another part of this question is can you get the same spline counts for both carriers.
2. Will the brakes from my 8 1/4 work on the 8 3/4. I already have the 4.5" bolt pattern. I've had a few people say yes, and some say yes with a but.
There are more, I just can't think of them right now. I'll ask more as they comes to me.
I know the 68-70 b body axles are wider, which I'm ok with as the wheels sit in now as it is. And my springs are moved inboard, so I know I also have to relocate the perches.
Anyone gone this swap have any tips or info please feel free to provide. Thanks...
Anyway on to the info I'm looking for. I've found a 8 3/4 housing with backing plates for $250cdn. And a complete, minus one drum, for $600cdn. Both out of 68-70 cars, the complete rear has high way gears and an open diff. Both will need to be rebuilt.
A few questions:
1. Will a 741 and 489 carrier work in the same housing. Or do they have different spline counts. I guess another part of this question is can you get the same spline counts for both carriers.
2. Will the brakes from my 8 1/4 work on the 8 3/4. I already have the 4.5" bolt pattern. I've had a few people say yes, and some say yes with a but.
There are more, I just can't think of them right now. I'll ask more as they comes to me.
I know the 68-70 b body axles are wider, which I'm ok with as the wheels sit in now as it is. And my springs are moved inboard, so I know I also have to relocate the perches.
Anyone gone this swap have any tips or info please feel free to provide. Thanks...
