[svxistentialist]

Originally posted by Joe 90
During city driving, I wish I could unlock the torque and drive in 4th, without the lock-up....

Does anyone knows how we could "prevent" the torque from locking?

Could it be switch controlled like on volvo's??

This could be an interesting option....

Comments welcome.

Thx
Joe 90

Joe,

In theory this could be done easily enough.

The TCU decides when to lock up using sensors such as speed and oil temp and what gear is engaged.

Lockup operation is controlled by a solenoid, and is therefore electrically operated under the control of the TCU. The computer uses a range of duty ratios for this solenoid. At 5%, it is "off" at 95%, it is fully locked "on".

For smooth operation, the TCU can command a start ratio of 25%, and shift gradually to 95% fully locked.

So if you disconnect this solenoid from the TCU, and insert a switch feeding it the voltages for 5% or "off" and the equivalent corresponding to 95% for "on", you can switch it in and out.

Did not know volvos can do that. Why? Is it more useful in snow??

Joe