I have a 73-77 a body 10 bolt 2:56 posi and was wondering if the posi unit would fit my 84 Grand National Rear. I dont mean swapping the whole rear just the posi unit inside. If you need any other specs let me know.
posi unit swap
- Thread starter fodoimp
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The differential should swap if your GN rear is an 8.5. The 73-77 A body had the 8.5 ten bolt as standard equipment.
The problem is that the 2.56 carrier will not readily accept better gears from the 3.xx series. I think you can buy thicker gears aftermarket, but I'm not sure about that.
The problem is that the 2.56 carrier will not readily accept better gears from the 3.xx series. I think you can buy thicker gears aftermarket, but I'm not sure about that.
Hi,
I know you can buy the thicker springs or spacers for the 7.5", so they should make them for the 8.5". Check summit or Jegs.
Does anyone show how the width/ mounting on the A Body's differ. Can they be adapted to fit the G-body's? There is a local yard around here with quite a few A-body's that could be a good source. If so, anyone wanna buy a 7.5' w/ possi and 3.73's (just kidding until I get a replacement).
I know you can buy the thicker springs or spacers for the 7.5", so they should make them for the 8.5". Check summit or Jegs.
Does anyone show how the width/ mounting on the A Body's differ. Can they be adapted to fit the G-body's? There is a local yard around here with quite a few A-body's that could be a good source. If so, anyone wanna buy a 7.5' w/ possi and 3.73's (just kidding until I get a replacement).
a body rears require adjustable upper control arms, and they are approx 2" longer than the g body ones. so you would need more b/s for the wheels to fit the same as they are now
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