My 2007 honda rancher 400 got wrecked and I need parts as enexpensive as possible. Need rear differential cover or entire differential also need rear axle. Plastics and racks also....may be more

 

May be wrong but I think the 400 auto went out of production about 2005.

 

2007 was the 400 last year. http://www.atvreviewnetwork.com/enth...icleCode=40281

 

Right, the 400 auto was based on the 350, I think it used the same frame and plastics, pretty sure the racks will be the same, but there are year variations in the 350 racks so you will need late ones. As for the rear axle, it sounds like you need the lot, I'm not sure if the axle ratios are the same on 350 and 400, if they are, a used 350 back axle will be a lot easier to find than a 400 one.