I'm new to the forum...purchased a CPO '15 Suburban LT on 3/6/16...got in a wreck on 3/29/16 when an idiot ran a red light. Driver's rear tire took the direct hit and the rear end needs replacing. Body shop/insurance found a part number for an entire rear end assembly from Chevrolet, ordered it...but it never came. Long story short, Chevrolet has a part number and pricing for the entire assembly but they don't sell it. The body shop was able to source an entire used rear end from LKQ, but it has 3.42 gearing vs the 3.08 which my truck has. It seems to me like the best course of action right now, rather than trying to replace bent axles, bearings, seals, etc on the rear end in the truck. Seems like I have 3 options:
Install the 3.42 rear end. Buy a programmer, enjoy the performance bump and change the programming for the gear ratio so the speedo and odo are correct. I'm ok with this...but what would the MPG hit be? Has anyone else done this on a '15? I've changed FD ratios on race cars but never on a street vehicle.
Other option would be to order the 3.42 rear end and swap out the ring and pinion with my OE parts...hoping they didn't get damaged by the side impact.
Last option would be to replace the bent axle, bearings, seals on the drivers side and pray there is nothing else wrong.
Any thoughts or recommendations would be appreciated. Thanks!
Install the 3.42 rear end. Buy a programmer, enjoy the performance bump and change the programming for the gear ratio so the speedo and odo are correct. I'm ok with this...but what would the MPG hit be? Has anyone else done this on a '15? I've changed FD ratios on race cars but never on a street vehicle.
Other option would be to order the 3.42 rear end and swap out the ring and pinion with my OE parts...hoping they didn't get damaged by the side impact.
Last option would be to replace the bent axle, bearings, seals on the drivers side and pray there is nothing else wrong.
Any thoughts or recommendations would be appreciated. Thanks!
