I've swapped yokes on an 8-3/4" while leaving the chunk in the car, but I've never tried the pinion seal. Can the pinion seal on a 489 be changed while leaving the chunk in the car? after pulling the yoke?
Dont forget when reassembling to use a little silicone under the washer.
If you dont grease can run through the splines and out the yoke and it will look like a pinion
seal when it really isnt. doh
Ive seen it a few times 0/