What am I doing wrong! LOL My buddy picked up 4 spec-r diffs for our 417's. All of the feel tight. Sanded all gears as well as extra on the two larger gears. Do I keep sanding the crap out of the?!?!. Talk about custom fit and finish if that's the case... maybe im a dum dum... Adding a second gasket fixes it but that shouldn't be needed. Yes they are the latest ones with the green gasket.
Thanks in advance for any help!
K