I am going to change my 8.75 rear axles from sbp to bbp. When I do can I just switch the drums to bbp as long as they are the same size or do I need to change everything ie backing plates, drums, shoes ect. Any help will be appreciated. Thank You
Everything must be changed. The BBP axles have a different flange offset than the SBP axles. If you're installing true BBP axles then you will need 10x2.5" drum backing plates, drums, etc.
That's because Yukon makes axles that use the SBP flange offset with the larger bolt pattern. With those axles you can only use redrilled SBP drums, you can't use the 10x2.5" BBP drums.
You can't mix and match. If your axles have the SBP axle flange offset, regardless of the actual bolt pattern, you must use SBP brakes and redrill them to whatever pattern you have. If your axles have the BBP flange offset, you must use BBP brakes.
