Your vehicle is pinging; this is due to the factory timing, grade of fuel, and when you go into overdrive, buck a wind, pull a trailer,go up a grade you will notice it because of the increased load on the engine.Just for a test add an octane booster or fill with preminum next time and see if it dissappears; if it does, ask your dealer if there are any SERVICE BULLETINS on this problem.A light ping does not cause any harm but anymore than a light ping can hurt the engine. I hope this helps you a little.
Shifts the transmission in/out of overdrive Shifts the transmission in/out of overdrive
I have a 1997 ford e 350 van with automatic transmission when the transmission shifts form 3rd gear to overdrive at about 50-55 mph it falters and bucks and I have to let off on the gas so it can pick-up speed, when I have overdrive off and put on overdrive when 3rd gear shifts to overdrive at 50-55 mph it shifts smoother but if I give too much gas again it bucks and falters till I let off gas so it can retain speed slowly.
My 1984 corvette transmission is not shifting into overdrive. It shifts first thru third fine.
If you are on a highway maintaining over 45 mph. OK, but If vehicle continually shifts in and out of overdrive you are better off leaving it in 3rd
Overdrive is the normally allowed position , but unless you are going fast enough it will not shift into overdrive because it acts as the " top " gear ( on my Explorer I have to be going 50 miles per hour / 80 kilometers per hour before it shifts into overdrive )
If it shifts smothly into the gears before o/d it is not the cable.
four wheel drive low ========================================================= I know that on my Ford EXPLORER the automatic transmission shifts into overdrive around ( 50 miles per hour / 80 kilometers per hour )
The button does not switch from Overdrive to Automatic. The button just turns the overdrive off. Overdrive is not a separate drive system as your question implies. Normally you leave the car in overdrive mode. That way the transmission shifts into overdrive at highway speeds, thus saving fuel. If you are saying the transmission is stuck in overdrive and it will not disengage then seek out a A/T professional.
First you need to have a feeling of where the vibration is comming from(tranny,tires,etc).
Mine has the same problem. The transmission guy said not to worry about it.
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My friends car did the same exact thing. It could be your transmission sensor. I am not exactly sure what the sensor is called but it has to do with the way it shifts. Overdrive sensor maybe?