Been searching a number of posts yet can't determine a definitive answer. Learned a lot and it appears I may be very close here. I have a 26' TT, 28' with tongue, weighs about 6900 lbs loaded and has a Reese dual-cam, weight distribution hitch. My Tahoe is an '07 LTZ 2WD 5.3L with 3.42. I realize that the tow rating for this set-up is 6200 lbs. If I were to 1)install 4.10, 2) install auxiliary trans cooler and 3)trans temp guage - will this be sufficient? Looks like the 2WD w/3.73 is rated at 7200 lbs (Is the only difference in the ring/pinion?). Also seems like I am at the upper limit as far as length, but hope the Reese will aid a little here (weight dist. and sway control). If I can do this, then maybe I can worry about some bolt-ons later that can provide a little more power. I really like my Tahoe and want to use it for towing. Thanks.