My base FJ got rear ended, and the entire frame needs to be replaced. Besides asking the shop to use only genuine OEM Toyota parts, what else should I ask them to do, and what should I look for when picking up the truck after its repaired? To replace the frame, I know that the truck will have to be torn down, so putting it together properly is crucial. How do I test to make sure the A-TRAC, DIFF LOCK, LIMITED SLIP, TRACTION CONTROL and other drivetrain options are working properly when the repair is finished? When test driving after the repair, what should I look for?