Sorry for the late reply. I've been off the forum since April. The Z pack is a high performance set of clutch plates that allows extra plates to be installed into the drum. It's a great idea and increases the holding ability of the 3-4 clutch.
I think most of the guys on the site find you the Tranny guy, I was wondering since I've read in some of your posts that you've rebuilt many a 4L60E, I just wanted to run something by you so I can make sure I'm not getting hosed by the guy who rebuilt my tranny. I've got a '04 Suburban with the 5.3 4x4, he rebuilt it completely and he told me he used Borg warner clutches for 1-2 and the raybestos z-pacs for the 3-4, is this a good set up, he told me the z-pacs were performance clutches, I don't know my butt from my elbows when it comes to tranny's, and was wondering if you had an opinion or maybe a little insight. Oh yeah, I did ask for more durable or longer lasting clutches and that's when he told me about the z-pacs.
Thanks for any help.
bluestreak94 ( Loukas )