Missj wrote:Tire pressure is good. And there are no dash lights that come on. I tried to turn off the traction control to see if it made a difference, but it did not.
hmmmmmm. well there has to be something electrical. water & electronics dont mix.
have you or anyone else tried to disconnect the rear differential coupler? i think its called a "coupler harness". its a little plug on the side of the rear differential: #3
if its shorting out, and engaging in weird ways, it could cause the jerking sensation you feel.