4L60E to 4L80E Conversion. Transfer Case Spacer Needed on Borg Warner Transfer Cases, #10B / #AS-8603
#10B. This is a 3/4 inch spacer needed on some late model transfer cases to make the #10A adapter fit (Will require some slight fitting on 2007 6L Hummer H2 for sure). Needed on Borg Warner transfer cases used on Hummer 2 and Cadillac Escalade. Can also be used as a clocking ring to turn the transfer case.