No lock up in cold weather?

[MossyOakRam]

Hey guys when i leave work in the evening when the truck is cold and hit the hwy right away there is no lock up for about 5 mins of driving. i guess its the torque converter that locks up for lower rpm on hwy correct? Its only 4 degrees celcious. Is the lock up temperature sensitive? Even when truck is warm it falls out of lock up when speed drops from 90 to 70 kmh. Is this all normal?

 

[05daytona]

That's normal. It won't lock up until it reaches a certain temp.

 

[MossyOakRam]

Ok thanks. My 2001 ram did the same thing but eventually it wouldnnt lock up at all or go into 3rd gear then it needed a solenoid

 

[05daytona]

No problem. I thought it was weird too until I looked it up.