Q: How can you pull a rear end yoke to get to the pinion seal? on 2001 Ford F-350 Super Duty

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Trying to replace the pinion seal and can't pull the yoke. I've broken a 2-jaw puller to get it loose but it will not budge.
(1) Answer
Maybe it's corroded to the pinion shaft. Some heat and penetrating oil (I like to use Mobil 1 for heated things) may help, along with a few taps with a soft mallet while the using a stronger puller.