I've got the package from yukon.....4.88s. (there is a polar bear on the box)
Betty climbed like a champ when she was stock. I barely touched the pedals. Now with the 35s and stock 4.10s, she still climbs like a champ, but there is a difference.
Im at about 2k rpm at 70mph, and I like that because with the S/C I cruise at 80. Im going to lose some of that with this gear change, but I think im ok with it.
Im about to put the 37s on, and I think it will be nice to get the gear down to a level either par with the stock rubi, or slightly lower.