Will an 8 3/4 rear end fit in a 73 dart sport?

Let's get a bit more info before you start replacing parts.


Do you have the rear end off the ground?

Is the engine and trans and driveshaft turning the rear, or are you spinning a wheel by hand?

What you are describing sounds like 1 of 2 things.

1. The brake drums are out of round and are dragging at the low point
2. The pinion angle is really off and the angle is causing the rear axle to speedup and slow down as the drive shaft rotates