[DML] Re: Auto Trans Shift Points

["Dave Swingle" <swingle@xxxxxxxxxxx>]

There is a small so-called computer governor on the side of the 
transmission. It controls the shift points, based only on rear-wheel 
RPM (hint - this could drive an electronic speedo!!) and throttle 
position. There is a vacuum modulator on the back of the trans, but 
it only controls line pressure. If you want to modify the shift 
points you need to modify the comparator circuits in the computer. 

You might be able to fake it into shifting a little bit later by 
pulling the throttle input cable all the way up, but conversly it 
would downshift sooner too. 

There are a few people working on replacment electronics for that 
thing that use completely different (programmable logic) electronics. 
This will allow you to change shift points on the fly and monitor the 
shifting activity. 

Dave S

--- In dmcnews@xxxxxxxxxxxxxxx, deloreanss@xxxx wrote:
> Hey all, I have a question and I don't know if it has been 
discussed much in 
> the past. I have the auto in my car, and really, regrettably, I 
don't know 
> that much about the Renault unit. I worked for a company that 
specialised in Jag 
> trannys which were pretty standard Borg Warner units for the 6cyls, 
GM Turbos 
> for the 12 cyls. With the GM transmissions there was a vacuum 
modulator that 
> regulated the shift points for the transmissions. By adavancing an 
adjustment 
> screw clockwise or counterclockwise you can change the shift points 
on the car 
> to hold for a later RPM. What I want to know before I do too much 
> investigation is, does anyone know of a way to do this with the 
Renault Auto in the 
> DeLorean. Like I said, my transmission has been pretty solid, so I 
haven't needed to 
> study it much, but I wish it would hold first and second gears a 
little 
> longer.




To address comments privately to the moderating team, please address:
moderators@xxxxxxxxxxx

For more info on the list, tech articles, cars for sale see www.dmcnews.com

To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews 
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/dmcnews/

<*> To unsubscribe from this group, send an email to:
    dmcnews-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/