11.5in. cases and spiders came in two different sizes; with large and small hub sizes on the side gears. Small hub diameter is 1.816in. and came in 07/down GM differentials. Large hub diameter is 2.060in. and came in 08/up GM differentials and all Dodge differentials. This is a universal spider gear kit with adapters to fit either design. The early cross pin shaft included in the kit works with snap ring design carrier only.
