Just about every car and truck on the road 2wd or 4wd has the unitized bearings. They do fail just like a packable style bearings that a large portion of owners fail to maintain. My last 2002 4 x 4 2500 with a cummins had one bearing fail in 148,000 plus miles. It cost me 200.00 and maybe 1 1/2 hours to repair. To me that's not bad. If I had the packable style I would of had to service them about every 20,000 miles. That would of been about 3 to 4 hours plus seals and anything else that could go wrong. For the majority of owners who are not mechanics the unitized bearings is a good deal. If I had paid a shop 200.00 each time to service my bearings I would of paid in the 1,500.00 range for just that service over the 150,000 miles. Paying retail parts and labor for my one failed unitized bearing I would of spent 500.00.