What does a torque converter lockup switch do?
Torque converter lock up is one of those things that can be easily overlooked in the normal operation of any newer automatic transmission. When the converter is “locked” it is just like a direct drive manual clutch system allowing the stress to be taken off the fluid coupling and placed under full mechanical load.
What is a lockup switch Cummins?
Lockup switch is used for 3rd and 4th gears. Helps slowing on curves with engine braking. It will shift from 3rd to forth while locked up okay but won’t go from 4th to 3rd till you unlock it and shut off overdrive switch.
Do I need a lock up converter?
A lockup torque converter is important in automatic transmissions to reduce slippage. And once slippage is curbed, heat generation is minimal while fuel economy is improved.
What happens if the torque converter goes out?
When the torque converter starts malfunctioning, you may feel shuddering and even slipping in overdrive. You usually notice your car shuddering because it feels like it’s vibrating. Your car will vibrate even when you’re not going very fast. The shuddering makes the car lag and is very noticeable.
Should I lock my torque converter?
However, when the engine turns more slowly it causes the torque converter to slip, creating heat. Slipping reduces fuel economy and heat can damage the converter and the transmission. The solution is to lock the converter. Lock-up eliminates the slippage, which reduces heat and improves fuel economy.
What is the difference between a lockup and non lockup torque converter?
A non-lock-up torque converter will add more heat. With a lock-up when you get to speed, the torque converter will lock-up, which creates a direct drive from engine to transmission. No additional heat will be added into the tranny fluid due to slippage during operation.
Why would you want a non lockup torque converter?
A non-lockup converter can build excessive heat during normal cruising, especially in overdrive when engine rpm drops below converter stall speed. Choosing converter stall speed is largely based on camshaft operating range, and a lockup converter allows you to lean toward a higher stall speed for a better launch.
Is lockup or non lockup torque converter better?
Towing will add heat to the transmission. A non-lock-up torque converter will add more heat. With a lock-up when you get to speed, the torque converter will lock-up, which creates a direct drive from engine to transmission. No additional heat will be added into the tranny fluid due to slippage during operation.