To make it concise, i have a S70 base auto, when traveling close to 70mpg on highway, my RPMs are close to 3k. I am just afraid to travel faster with this car at about 75-85. is that normaol rpm speeds on these cars? Another question, when i am about to come to a stop, the RPM's bounce from 1.5k to 800 rpm's..

thnx

 

@ 70 mph in our GLT the rpm's are around 2,200. Are you sure you are in D?

 

Is the tranny going into lock up, when mine is cold it takes awhile for it to lock up the torque converter and the rpm`s are high.

 

I think "lock up" means that the tranny stays in it's gear as you slow down a bit. Example, my tranny usually shifts into 3rd at around 37 mph then into 4th at 54 mph. But if I slow down to 45 mph it will stay in 4th. It locks into 4th unless I slow down to something like 40 or hit the gas causing it to "kick-down".

I don't remember what they call it when the car downshifts when you're going down a steep hill. Sometimes when I'm going 60 mph and going down a steep hill my car will downshift by itself and then shift back into 4th when I put my foot in the gas pedal.

 

2450 RPM at 70 MPH in mine. GLT SE.

 

Wow thanks for your replies and suggestions, i think im a replace/ flush the the transmission oil & filter to see what happends. Ill have to do a fuel filter, spark plug, cap & rotor replacement and even clean the throttle body. Any suggestions on tranny oil?

 

short or long tranny dipstick?