[DML] Re: ERRATIC AUTO TRANS

["David Teitelbaum" <jtrealty@xxxxxxxxxxx>]

>From the lights you can tell what gear the shift computer is
commanding the transmission to be in. The neat thing about it is you
can actually see it change gears BEFORE the transmission can even
shift! You know immediatly if you are starting out in 1st or 2nd and
there is no guessing at what speed you are shifting at. Now if someone
wanted to get really fancy, from the logic they could power a display
so it would show the gear #, not just 2 lights. It is easy to add a
switch and override the shift computer to shift manually but I do not
think it is a good idea. There is no govenor to prevent you from
commanding shifts at the wrong speeds so you can do damage with
improper shifting. The shift computer handles all the shifting so
without it you have no safeties. BTW if you can't for instance get
into 1st gear you really won't know why until you use the light box.
If, for instance, the light box is telling you the shift computer is
commanding for 1st and you are not in it then you would asssume the
shift computer is OK and the problem is with the wiring, a solenoid,
or perhaps the valve body. (This is JUST an example for the usefulness
of such a tester). If your car is shifting fine then you are correct,
there really is no need for the light box.
David Teitelbaum
vin 10757


--- In dmcnews@xxxxxxxxxxxxxxx, "Videobob Moseley" <videobob@xxxx> wrote:
> 
> David, I have seen your instructions on how to build this "light
box" in the 
> past,
> I don't understand what this is about.
> You can easily tell what your transmission is doing since there is
only 3 
> gears.
> I can tell what gear I am in, does the light box tell you something
else 
> besides
> what gear you are in?
> I think I am having trouble understanding what it is for.
> What I think you be useful is a manual override where you can push a
button
> and choose your gear and override the computer... now that would be
useful!
> - VB
> 
> >From: "David Teitelbaum" <jtrealty@xxxx>
> >Reply-To: dmcnews@xxxxxxxxxxxxxxx
> >To: dmcnews@xxxxxxxxxxxxxxx
> >Subject: [DML] Re: ERRATIC AUTO TRANS
> >Date: Tue, 25 Jan 2005 05:06:18 -0000
> 
> >
> >Build a light box so you can see what the computer is actually doing.
> >Once you can verify the problem is the computer you can fix or replace
> >it. If it is NOT the computer then it is either the wiring, a
> >connector, or a solenoid. You can contact me off-list if you want info
> >on building the light box. In the meantime go over ALL of the external
> >on-car adjustments as per the Workshop Manual including fluid level
> >checks of BOTH the trans AND final drive.
> >David Teitelbaum
> >vin 10757
> >
> >
> >--- In dmcnews@xxxxxxxxxxxxxxx, "delor_01" <JOHN.JORDAN@xxxx> wrote:
> 
> > > I have an auto trans that starts out in second gear--stays there for
> > > about 10 or 15 min then will shift into 3rd.  once it shifts it will
> > > work ok until I stop for 2 or 3 hours.  Then it goes back to second
> > > gear for 10 or 15 minutes.
> > >
> > > I have a rebuilt computer gov in the car.   any suggestions?
> > >
> > > re:  John








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