Hey guys, kina new here but I just wanted to be sure that my Tj is ok, I have to disable my od anytime I drive at lower speeds. Basically I have to turn it off until I hit the highway. If I don't I get a brief RPM spike between 2nd and 3rd. I did a lot of reading this and from what I can tell this might be normal but I want to be sure. Some details: I'm running and automatic 2003 Rubicon with 30 inch tires. Seems odd that I have to constantly monitor the od. Oh and its been around 8 degrees here for the past week in case temp has anything to do with it.