To make you feel better. Mine idles in "D" at 400rpm and 550 in "N". I've watch my rpm numerous times and do noticed what you mentioned. I see it when I accellerate and then brake to come to a stop and just before it gets below 4-5mph my rpm drops down to 350 to 400rpm then when the truck comes to a complete stop the rpm raise back up to 450rpm and clowl drops to 400rpm in "D". I think it's normal. Never has the engine chug or shake at that low of an rpm though.
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Stuffs:
JBA Headers, Costum Exhaust, ASP U/D Pulley, Centric Crossdrilled & Slotted Fr Rotors, LSD, IS Kit, Manik SS Steps, HID Headlights & Fogs, Pacer Tailgate LED Light Bar, Blacked Out Headlight & corners, LED tail lights
Toys:
04 Skeeter ZX250 w/300 Vmax HPDI (79.35gps so far)
05 Polaris Sportsman 700TWIN EFI (rarely ride)
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