I get a vibration in the whole car when it shifts into OD with my auto. I'm pretty sure it's a rebuilt trans but since I bought it as a repo, I don't know it's history. But, even though it only does it in OD doesn't exactly mean trans problem, it could be speed related and be tires, drive shaft, shocks, struts, u-joints, etc. As stated before, it could be any number of things, there is no magic cure. I'm still trying to locate my issue without actually pulling the trans and inspecting/rebuilding it.