When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I had the rear end completely gone through by justdifferentials.com (near my home). They put the cover on it while they were in there, and here are my thoughts on this:
The capacity was increase by one quart, it looks fancy, and it has the alleged cooling fins - but I haven't seen any real difference (pardon the pun) in temperatures... maybe that will change as the parts break in more. While it's nice that I can drain and fill the fluid without taking the cover off, this does not lend itself easily to inspecting the rear end without an inspection camera. It does, however, make less mess when draining before pulling the cover. Food for thought.
I will check Clays prices at Riff Raff I have bought several things from them and appreciate their honesty and prompt shipping. The one in the picture is neat but mine differential spends a fair amount of time covered in cow sh--, snow, and mud.