Just a side note, if you want the type s shifter (02-03) the shifter stick for the knob is skinnier. The base model is thicker for the knob. Well in my case it was. I was going to wire mine to the normal shift lock, but didn't want more splicing so i just cut it. You wont shift into reverse unless you really want to. The gated shifter will stop you. (BUT STILL BE CAREFUL!!!) i just put mine in tiptronic mode and shift Up and down all day LOL. (Mine was not wired for it, just habit). As for D3 D4 D5...ON A TL CLUSTER not sure of the OEM... if you get the 00-03 shifter D4 will be D5. Its computer controlled basically, so once the transmission range switch is in D4 position the computer will send the signal for D5 just because of the cluster internal circuitry. The other gears are basically just grounded when the transmission range is in the specific gear. Maybe someone can chime in with the OEM cluster.