Torque Converter Lock-Ups

[David A. Cooley]

Martin,
Here in the states since at least 1985, GM has been using electronic
control to open and close a solenoid to apply the TCC.  There is some
control in the trans (no fluid allowed until at least 2nd gear), but after
that it's electronic.  My 95 LeSabre actually controls the speed of lockup
by varying the PW going to the TCC apply solenoid.  It can control the
amount of slip the TC has by performing partial applies.


At 08:02 PM 11/12/98 +0000, you wrote:
>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 
>    
>----------------------------------------------------------
>martin at mgass.demon.co.uk
>----------------------------------------------------------
> 
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           David Cooley N5XMT           Internet: N5XMT at bellsouth.net
     Packet: N5XMT at KQ4LO.#INT.NC.USA.NA   T.A.P.R. Member #7068
       I am Pentium of Borg...division is futile...you will be approximated.
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