Have a question regarding the rear axle on my 48 Jeepster. The field guide in the K-W catalog says that the vehicle has a Dana 23 rear end. The tech/shop manual issued by Willys says that the rear end is a Spicer model 23-1. I ask because the rear has a leak at the pumpkin and can't seem to find a gasket for this. K-W catalog shows rear cover gaskets for almost every Dana rear except the 23. Appreciate any help given.