Pull the transmission measuring stick, look at the color of the fluid, it should be a reddish color, not brown. Original fluid is red, it will discolor with age, if it’s brown and has a burnt smell, it means the transmission has been slipping, the internal clutches are worn.
If there is no burnt smell or brown fluid, it may just be a simple transmission reprograming or updated downloads to the ECU (engine control unit).
Modern automatic transmissions are controlled by the ECU. The ECU has the ability to memorize your driving habits, how fast you accelerate, average speed, distance travelled, etc. This is to optimize fuel economy and develop shifting points. If another driver uses the vehicle, it can change the shifting points, because of different driving habits.
Transmission fluid should be changed regularly, each manufacture has it’s own recommended change intervals. Some auto dealers recommend a power flush when you change fluid. This has some value, since torque converters hold over half of the fluid, and it can’t be drained manually. James Collins Ford
I’ve always been a hands on car owner. Usually doing all minor car or even home repairs. But with saying that, modern autos and trucks are something I can do almost nothing, except the usual fluid top offs, tire pressure checks, engine oil check, tire wear check, visual brake pad inspections.
Twenty years ago (1990’s) the average new vehicle had on board computing power, equal to on board computers used in the 1969 Apollo 11 Moon mission. Now they are equal to military aircraft of the 1980’s. Modern autos and trucks are amazing.
Carburetors have been replaced by fuel injectors, spark plugs are now platinum tipped and only need 100K replacement, air cleaners 30K replacement, semi synthetic oil 7.5K.
Turbo charging makes engines smaller and more powerful, plus increasing fuel economy. Turbo chargers are lubricated with the engines oil, and clean oil is important for the Turbo charger.
While I can’t repair my new vehicle, I can keep it operating properly, with regular factory scheduled maintenance.
Inexpensive automotive computer scan tools are available, but they will only read the vehicle computer codes, they won’t tell you what parts need to be replaced. Inexperienced mechanics may just start replacing parts, until they finally locate the actual defect one. Many times those parts and labor are covered by auto manufacturers emissions warranties, which are 8/80.<a href=”http://jamescollinsford.com“>James Collins Ford</a>