Torque Converter?

[907DAVE]

Originally Posted by ticopowell

That makes sense, I knew about the "fans" inside the AT, so the torque converter basically locks the engine to the tranny. but why then does it only lock when I am going at a steady speed? if I floor it at 65 with it locked, it unlocks as the truck shifts to 3rd, or 2nd(forgot which), then it doesnt lock up again until I am cruising again... that normal?
oh and thanks for the quick reply!

Nope... the torque converter clutch locks things up.

When you stab the throttle you are demanding lots of power, which means you will need to get the rpms up into a higher range. If the TC stays locked all that will happen is you will lugg the engine and not get anywhere, unlock it and it will "free" up the engine to build some R's. I believe the main purpose of the converter clutch is fuel economy (emissions), with it locked in there is no more wasted energy.

Your truck is acting perfectly normal.