2007 Tacoma TRD sport off road steering wheel shake.

When off road, even on rough gravel roads, my steering wheel shakes back and forth a lot. I'm not sure if this is normal or not, and If its not what is wrong? It has a 3 inch rough country lift (I know it sucks). A local shop said steering column is all good....could they be wrong or is my suspension just so bad it bump steers like crazy? Idk, but what do you guys think might be wrong?

 

I have a little over 10k on a 2015 Tacoma TRD Sport. When I'm on washboard dirt roads I feel the same thing through the steering wheel and it's beyond bothersome. I'm searching for info on the same issue. It seems to be a common problem, but getting direct answers about a 'once and for all fix' is a little difficult and frustrating. I'm wondering if a stabilizer is an option for this truck. I'm waiting for the local dealership to open; going to ask the service department. I'll post any new info.