What do the overdrive and ECT buttons do on an automatic transmission?
With the overdrive off the transmission will not use the highest gear. This is useful for towing and keeping up your speed up on the hills. I especially like to use it to slow me down fast without hitting the brakes which is useful when I see a cop. The disadvantage of turning off the overdrive is the high engine RPMs at freeway speeds and the resulting noise and poor mileage. The ECT button stands for Electronically Controlled Transmission and it essentially changes the shift points. It will let the engine rev higher before shifting to the next highest gear. This is useful for faster take offs and climbing those mountain passes. Again, use of the ECT button can diminish mileage. 6. What can I do to increase power of my 3.0 Liter V6 engine (1st and 2nd gens) In short, nothing. To get any appreciable power gains from the 3.0 you must throw in lots of money. The most popular and cost effective change is to go with headers. Next is to change the differential gears because you probably swi
