Once you have achieved highway speed, you would stay in the highest gear, except for steep uphill or downhill grades.
Common cars can't do highway speeds (65 mph) in first gear and many have rev limiters.
It would shorten the life span of the engine some.
it is to select "overdrive" gear in transmission. mainly for highway driving. if you have both "D" and "D" with circle around it, use "D" for most driving needs.
The drive gear will turn faster.If the driving gear was twice the size of the drive gear, the drive gear would rotate twice for every revolution of the said driving gear.
OD is a highway gear meant to maintain high speed with less engine effort, you should keep it off during regular street driving to prevent constant shifting in and out. When you are pushing the button it is dropping out of over drive and into the regular high gear, keep it that way until you are on the highway and your transmission will last longer.
Check fluid level, (90 weight oil)
Fifth gear is like overdrive, it is meant for flat open highway driving. It is a gas saving gear so that you can travel at highway speeds at low rpm and your engine is just too small to use that gear at any other time. So use it on flat or slightly down sloped roads, fourth should be your normal gear for from about 45 to 65.
Yes under normal driving conditions. In fact most vehicles will operate just fine in fifth gear anytime above 50 mph and will help your gas mileage. The exception would be if you are in mountainous terrain and your vehicle seems to be struggling going up hill. So basically anytime your vehicle operates normally fifth gear is a good choice.
More than likely a 3.08 gear ratio. which is a highway gear and a little strip very little unless not stock clutch/torque conveter
depending on the type of vehicle you own yes it can harm your transmission. i would always use D due to better gas mileage, and smoother driving.
Well, driving at highway speeds in any vehicle in 2nd gear, will raise the RPM of the engine, meaning that the engine is working that much harder to maintain the speed. As the engine constantly revs at a higher RPM, it heats up alot quicker, which in the end could do alot of damage to your car. And if its a Lexus, i would advise to SWITCH gears and keep an eye on your RPM and temperature gauge
its 4th gear in an automatic. its used to cut down on gas usage while driving on the highway or just every day driving. it should automatically engage when in D4 on the shift column.