4 runner runs great up to 55MPH and over 55MPH, but skips and jumps at 55mph??? on 2001 Toyota 4Runner

transmission checked out fine
any ideas?

Get Your Car Fixed at a RepairPal Certified Shop.
We certify shops based on expertise, quality work, and verified customer reviews
2 answers
possible torque convertor lock-up issues...
Can you give a different , more specific description? Are you talking about the engine or suspension and how much into throttle when occurs?