My 07 Toyota Tacoma with 67K miles on it bumps forward after sitting at a complete stop for 10 to 15 seconds. It resembles the bump you would feel if it was in neutral then with your foot on the brake you put it in drive. Haven't found an answer to that one. It doesn't have a dip stick to check the trans fluid, weird. A friend of mine who ran a trans repair business for 35 yrs once told me that torque converters can do weird things. My 06 GMC Duramax, once it sits for over a week in the garage, when you first start it will not move once you put it in gear, it takes a few seconds. My tranny guy said drive it more often. 110K miles presently.
