"Manually shfting" an auto tranny...

[Clare Snyder]

----- Original Message -----
From: <DemonTSi at aol.com>
To: <diy_efi at efi332.eng.ohio-state.edu>
Sent: Monday, May 31, 1999 7:48 PM
Subject: "Manually shfting" an auto tranny...


> Hi folks, I'm pretty ignorant when it comes to trannies, and was wondering
if
> someone with a bit of knowledge of modern auto trannies might help me out.
Am
> I correct in assuming that most newer auto trans (maybe even old ones
too?)
> use a single solenoid to control the flow of oil, which determines the
> shifting of the tranny? If so, is it possible to control the shift points
of
> the tranny, assuming that you eliminate the stock programming in the
tranny
> ECU? I was just thinking that one could hook up a switch to that shifting
> solenoid and shift "manually"...or maybe it can still be done, but another
> way?
> Any help would be great.....!
>
> Van
> - http://members.xoom.com/BADROC

More than one solenoid involved, and only on electronic control automatics -
which not all, even today, are. Most use at least 3 solenoids, if memory
serves me correctly. Manual shifting could be accomplished with a bit of
head-scratching and logic.