Have had to replace the bearing and seals in the.

Have had to replace the bearing and seals in the rear axle 3 times in 5 years. Frame is not twisted. This is a 4x4 xtracab v6. After researching, found that earlier 2wd models have had this problem. Is this a super common problem to your knowledge and should I just replace the rear axle completely to fix this? Or just get rid of it and buy something new?