Torque Converter Lock-Ups

[Roger Heflin]

Well,

I have a 93 Z28.  I know there is a way for the computer to request
lockup.  The lockup characteristics seem to be:

low throttle: 50mph+ in high gear.
wot: 95+mph in 3rd gear (about 4300 rpm)

My car at least (with a big cam) has difficulties with the low
throttle lockup.   I am currently disassembling the prom, and
hopefully can find where it controls things.  It looks like I need to
raise the low throttle part to about 60-65.

Also there is a electronic control to lockup things and it can be
manaully controlled with some aftermakert parts.  I was thinking that
In cases where the car computer cannnot control things someone could
rig a circuit to detect some various car parameters and decide when to
force a lockup.

Note that my car has a 4L60 tranny (basically a 700R4) and this is the
non-electronic tranny, the 94 f-bodies was when they started using
4l60E's, so all of my tranny is under mechanical control except for
the torque convertor.



		Roger

 On Thu, 12 Nov 1998 martin at mgass.demon.co.uk
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
> ----------------------------------------------------------
>