2002 Nissan Xterra Owner's Manual - Page 144

When cruising at a low speed or climbing a gentle slope, you may feel uncomfortable shift shocks as the transmission shifts between third gear and overdrive repeatedly. In this case, depress the OVERDRIVE switch to turn the OVERDRIVE off. The O/D OFF indicator light in the instrument panel comes on at this time. When driving conditions change, depress the overdrive switch to turn the OVERDRIVE on. Remember not to drive at high speeds for extended periods of time with the OVERDRIVE off. This reduces fuel economy. CAUTION Do not rest your foot on the clutch pedal while driving. This may cause clutch damage. Stop your vehicle completely before shifting into R (Reverse). When the vehicle is stopped with the engine running (for example at a stop light), shift to N (Neutral) and release the clutch pedal with the foot brake applied. WDI0049 Shifting To change gears, or when up shifting or down shifting, depress the clutch pedal fully, shift into the appropriate gear, then release the clutch slowly and smoothly. You cannot shift directly from 5th gear into R (Reverse). First shift into the N (Neutral) position, then into R (Reverse). If it is difficult to move the shift lever into R (Reverse) or 1st, shift into N (Neutral), then release the clutch pedal. Depress the clutch pedal and shift into R (Reverse) or 1st again. Starting and driving 5-13 MANUAL TRANSMISSION WARNING Do not downshift abruptly on slippery roads. This may cause a loss of control. Do not over-rev the engine when shifting to a lower gear. This may cause a loss of control or engine damage.