I went to the dealership the other day to order a speedo gear for my father-in-law. He did the BB and 32" tire thing. The recommended gear for this is a 27 tooth gear which I told would be easier to get from Jeep. The counter guy said there is a problem with ordering that one specific gear. It turns out that Jeep assigned a superseded part no. for this gear, but when you order it it turns out to be alltogether the wrong gear.
binaryking, have you heard of this before?