If you bought the extra pinion bearing then you got the right one.
The kit I bought was the installation kit + bearing kit for 89.99. On the same exact kit, there was ANOTHER drop down box for "2010+ bearing" so I called them and asked them what was going on and if I needed to pay 89.99 install/bearing kit PLUS another 59.99 for the 2010+ bearing. The representative Duncan said I was good to go and that the correct bearing was included in that kit for 89.99 without needing to buy the drop down bearing. This is the kit I bought- Rear End Installation and Bearing Kit (8.8in) R8.8RMK - Free Shipping!
Notice how they charge you 59.99 for the bearing, and 29.99 for the install kit. I asked if I had to check the drop down box for the 2010+ bearing, he said no, the bearing included in this base kit was the correct one for my 2011 v6.
I swear that if the bearing is causing these decel vibrations and whine, AM is going to have a HUGE S***STORM on their hands and will be paying for the labor to fix it as well as my gear kit for this false information.
Current Mods: 19x8.5 Charcoal AMR Rims, Bama Tune 93H, Airaid CAI, FRPP Sport Axle Backs, FRPP 3.73 gears, Boss/CS/GT500 Rear Diffuser, GT500 Rear Spoiler, GT500 Mud Guards, Raxiom Reverse/License LED Lights, OEM Take off Black Charcoal Leather, GT500 Steering Wheel, Auto Headlights, Chrome 3.7 Badges, Quarter Window Louvers, Dark Matter Tint
Future Mods: Matte black GT500 Stripe, Black Billet Grilles, Stillen Front Chin Spoiler, Roush Side Splitters, Painted Mirror Caps