Engine/Transmission (1998.5 - 2002) Torque Converter lock up

[JTBMC]

Howdy Guys,

At what speed should the torque converter be set to go into lock up, while just cruising and again while towing.

Is 30 mph to low for lock-up and what speed should it un-lock at WOT.

Thanks TJ

 

[y-knot]

Their are just to many variables to answer your question. The rate at which your torque converter will lock-up all depends on the throttle position, RPM of engine, vehicle speed and load on the engine. I do not remember the characteristics of the stock trany, it has been to long. But generally my ATS trany will want to go into lock-up as soon as possible. This means with just the truck and no load, I will hit lock-up as low as 35 MPH. Normal highway entry ramp will be 55 MPH. Like I said, there are just to many variables.

 

[TRAMPLINEMAN]

On mine, with OD off, it will go into lockup between 30-35mph. With OD on, it will go into lockup between 45-50mph.