Torque Converter Lock-Ups

[martin at mgass.demon.co.uk]

I would like to raise the subject Auto Transmission Torque Converter (TC)
Lock-Ups and Electronic Control..

Does anybody know if there are any TCs with Lock-Up operating under
electronic control in tune with the auto-box.

Most TCs seem to me to Lock-Up purely mechanically determined by 
speed and load.  (are these the only parameters and are they the 
correct ones ?).

Are mechanical based Lock-Ups adjustable in any way...or must the 
whole TC be replaced ?   Similarly if there are any under elctronic 
control are they alterable....what electronic control device is used ?

I believe that TC lock-Up is a relatively recent thing and was 
not present in the Borg-Warner Type 35 & 65 implementations of the 
late 60s and 70s.  I first remember it being mentioned in Europe in
some small Ford Autos of the early 1980s...but has now found its way
into most Auto setups.
  
Martin 
    
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martin at mgass.demon.co.uk
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