2007 Nbs 4.8l For Towing

[sambuhler]

I have a 2007 NBS Chevy Silverado 4.8L WT 2WD Ext Cab Std Bed with factory tow package. Unfortunately, I have the 3.23 rear axle ratio which on the NBS puts a max tow rating at 4700 lbs. It seemed as though the 2007 Classics and older models were able to handle about 1,000 lbs more even with the 3.23 rear axle ratio. I currently pull our camper with my wife's 2007 Nissan Armada, but the lease will be up in less than a year and don't know if I will purchase another big vehicle at that time.

 

The camper is approximately 5500-6000 lbs loaded. I have been told by some shops that what I have will pull it fine. Online I have been reading that I really need to have a rear axle ratio of 3.73 or 4.10. With the 3.73 the tow rating is pushed to 6700 lbs. There does not seem to be anything out for 4.10 unless it is a 4WD. I have been told that the gm parts to get the job done are extremely expensive ($1,200 just for the parts).

 

My question to the experts .... What parts are actually needed to complete this job? What do you recommend - tow as is? upgrade to 3.73 or 4.10? Unfortunately, trade-in values have tanked on these vehicles, so unloading it does not seem to be an option.

 

Thoughts

[Outbacker]

I would recommend that you change out the rear end to the 3.73 and get the tow rating of 6700 lbs. The will put your over the camper weight, plus give some "gravy" room for any extra gear. The parts required will be a new gearing for the rear end, and your quote seems close to reality. I was quoted about the same here to get a higher ratio as well. But it will give you the tow rating you need to pull the camper safely, and at the end of the day that is what is important. Again, this is just my opinion, and I would probably pony up the coin to get it done.