yea a traction bar will eliminate the twist u are getting. i get mad axle wrap with my rear set up. im eventually gonna cave and go with 63s or f150s..whichever i find cheaper.
what rear springs are u running?if u are getting axle wrap or twisting just from a dead stop they might be way too soft or your shocks might not be doing there job keeping the tire on the ground or your shackles could be too wide for the springs causing to much play.
im just speaking from my experiences so idk for sure what is causing it.