Around 40-50 mph sometimes there is a faint vibration from the gas pedal (automatic trans). The vibration last about 2 seconds and occurs maybe 2 or 3 times in a row. It does not happen all the time and naturally it did not occur when driven by a transmission shop. Any thoughts are greatly appreciated. Maybe I should have the transmission checked by the shop?
Thanks

 

When was the last time you had the tranny looked at/serviced?

 

It was looked at around 35,000 miles. A-ok, now I have 51,400 on it. Never been to the track, highway and city driving.