Chrysler 8 3/4 Rear Differential -- swap 741 to 489 case

[Maxrat]

1966 440 cu in Dodge Charger: The car has a 741 case with 297 gears. I have a 489 case with 323 gears. Will the 489 bolt in without having to modify the driveshaft or u bolt connections?

 

[Jerry Hall]

Measure the yoke on each, if they are the same it's a direct swap. If they are different it will require a combination U joint.

 

[727]

If going from a 7260 to a 7290 u joint.
Will need “Moog 347” to bridge the two different size yokes together.

 

[Demonic]

Yes, as noted above. It will bolt right in, the two U joint sizes are 2 1/8 and 2 5/8" if I remember correctly. Crossover joints are readily available.

 

[Cranky]

1966 440 cu in Dodge Charger: The car has a 741 case with 297 gears. I have a 489 case with 323 gears. Will the 489 bolt in without having to modify the driveshaft or u bolt connections?

Well, did ya get the swap done?