I agree with Tacocaster, that your pinion gear is a touch too close to the ring gear. Get a new crush collar and decrease one shim and see how it looks. You're not far off - check that your backlash is in spec as well.Hey dfrates,
IMHO (key word here is OPINION) it looks like you might need to DEcrease your Pinion Shim as it looks a bit deep on your Drive and increase your backlash as your a bit low (towards the axle) on the coast side. You're not that far off so do small amounts for each and expect you may have to do it again to "nail it". The idea is to "float" in the centre/ middle of the face on both drive and coast. Getting it right or close to right is worth the effort.
Easy to say, PIA to do but look at it as something fun to do rather than a chore and you'll enjoy the result.
There are good knowledgable guys on here that may see something I've missed though so standby....