Did the brown wire mod, and all is good. However I did measure the tire height as best I could with a straight edge across the top of the tire, and a tape measure to determine height. The Michelin 255/55R18 with approximately 50% tread came in about 1/8" taller than the Bridgestone 255/55R18 with approximately 50% tread. So this definitely verifies that tire height is a factor, and only as little as an 1/8" difference will cause the jerking felt while coasting.
Also for all you 3rd gen guys and gals the brown wire mod is no where near as difficult as some have made it seem. I have read quit a few threads in reference to the brown wire mod, and they tell you 8 foot of wire, toggle switch with a light, cutting a whole in the dash, relay, 2 hrs to complete, ect. I did this mod in 20 minutes. Granted I already had a toggle switch, and wire connectors, but still very simple. A 2 position(on/off) toggle switch is a must (10 amp or higher), an old 6' or 8' extension cord, two blue female wire ends or 2 blue ring terminals if you get a toggle switch with screws on the connectors, 2 blue butt connectors or two small blue or grey wire nuts, and some electrical tape. Step 1: Cut both ends off the old extension cord then put either the female wire ends or the ring terminal to one end of the cord and attach to toggle switch. Step 2: Pop up the passenger side rocker panel plastic(it runs along the floor from front to back of passenger door) there are 3 heavy duty metal clips that hold this plastic on, if any of the clips do not come off with the plastic pry them off, and attach them back on the plastic piece. Step 3: Pop open the top of the black plastic wire tunnel.. under in that tunnel you will see 2 wire bundles, locate the small bundle remove some of the factory black tape about 8" to 10" back from the front of the door, and pull out the brown wire.. cut the wire. Step 4: run the bare end of your old extension cord down and behind the kick panel plastic under the dash just in front of the plastic you just popped up, and attach with either butt connector or wire nuts, one end of your old extension cord to one end of the brown wire, and the other end of your old extension cord to the other end of the brown wire, and then tape up with electrical tape. Step 5: Put the wire back in the tunnel and pop the top back down. pop the rocker panel plastic back down. now open the glove box, and route your toggle swithch into the glove box from the right side of the box. coil any excessive wire and put a zip tie on it, and this will be the new home of your toggle switch, in the glove box. Out of the way, no drilling, no tearing the radio out, no dash work at all.
