The tube extensions on the rear diff., did you guys add those or did they come off the assembly line like that. THe reason I ask is because my rear diff. breather has no extension tube. All it is the little breather screwed right into the axle houseing. When I did my Sl and dropped the front diff. it had the extension tube. It doesnt make sence to me that my front diff. would have an extension and the rear would not.