Store › F350 UNIT BEARING ADAPTER REAR Image 1 of 3 Image 2 of 3 Image 3 of 3 F350 UNIT BEARING ADAPTER REAR $350.00 This is a F350 super duty unit bearing adapter for 4.0” axle tube.Cad designed and CNC machined from 4130 Add To Cart Added! This is a F350 super duty unit bearing adapter for 4.0” axle tube.Cad designed and CNC machined from 4130