I replaced the yoke on the rear end of my 88 yj because it was worn on one side and the u-joint kept going bad. A few days later, I noticed some fluid leaking from the pinion seal. After further inspection, I found the outside diameter of the new yoke is smaller than the old one leaving a gap. This is a yoke I got from the dealership and they said it was the right one. Has anyone run into this before? Is there a different seal I can install to fix it? Or do I need to find a different yoke?