when do you use overdrive on a truck
Overdrive (mechanics) Generally speaking, overdrive is the highest gear in the transmission. Overdrive allows the engine to operate at a lower RPM for a given road speed. This allows the vehicle to achieve better fuel efficiency, and often quieter operation on the highway. When it is switched on, an automatic transmission can shift into overdrive mode after a certain speed is reached (usually 70+ km/h [40-45 mph or more] depending on the load). When it is off, the automatic transmission shifting is limited to the lower gears. Overdrive should usually be selected when the average speed is above 70 km/h (40-45 mph).
Toyota Tacoma The TRD Sport package comes in two levels. The first level has a color-matched grille, color-matched front/rear bumpers, color-matched door handles, color-matched mirrors, Bilstein shocks/struts, TRD interior, hood with scoop, A/C inverter in the bed, bed rails with cleats, stainless steel exhaust tip and 17" wheels. The second level includes the above and also adds a towing package (oil and transmission coolers), and heavy-duty high output alternator.[citation needed] The 2005 to 2008 model years came with a mechanical true limited slip locking differential. The 2009 model year onwards has an open differential with a brake assisted "automatic limited slip" rear differential, similar to a VSC system.[citation needed]