2005 Chrysler PT Cruiser Owner's Manual - Page 203

STARTING AND OPERATING 203 "R" Reverse Shift into this range only after the vehicle has come to a complete stop. "N" Neutral Engine may be started in this range. "D" Overdrive This range should be used for most city and highway driving. It provides smoothest up shifts and down shifts and best fuel economy. When frequent transaxle shifting occurs while using the Overdrive range, such as when operating the vehicle under heavy loading conditions (in hilly terrain, traveling into strong head winds, or while towing trailers), use the "3" range. "3" Drive This range eliminates shifts into Overdrive. The transaxle will operate normally in first and second while in this range. NOTE: Using the "3" range while operating the vehicle under heavy operating conditions will improve performance, fuel economy, and extend transaxle life by reducing excessive shifting and heat build up. Use the "3" range when descending steep grades to prevent brake system distress. "1" Low This range should be used for maximum engine braking when descending steep grades. In this range, up shifts will occur only to prevent engine over speed while down shifts from 2nd to first will occur as early as possible. 5