2007 jeep wrangler 2 door rear end

I have a 2007 jeep wrangler 2 door. My problem is my rear end went out carrier spider gears all of it except the pinion and ring gear. The rear end is a dana 44 with a 410 gear ratio. My question is if I buy another factory carrier assembly do I have to re-shim? Or do I use the factory shims?