[6pack] Overdrive controller

[Tom Martin]

Hi guys
  I've  been driving Vovo's for 30 years and TR's for longer, all with 
overdrives, I've always thought a Volvo style relay and switch, which works 
the way  Rick describes, would be excellent. One place we allready have an 
intermittent style switch is on the "flash to pass' on the headlight dipper 
stalk, many of us don't have this connected. I have often wondered if it 
could be used for the pulse to the od intermittant relay, and then just 
follow the volvo wiring scheme. I really like being able to keep my hands on 
the wheel and flicking in and out (when I remember!). I use my 2nd gear od 
alot in traffic, but I have power shifted into it a number of times, it 
would be nice not to do such a silly thing!!!  BTW it is a "j-type" wired up 
like an "a-type" so I can use it in 2nd,  probably 50 to 60k miles on it 
this way.

                                               cheers Tom Martin   75 TR6
----- Original Message ----- 
From: "Navarrette, Vance" <vance.navarrette at intel.com>
To: <6pack at autox.team.net>
Sent: Monday, January 19, 2009 10:51 AM
Subject: [6pack] Overdrive controller


>    Folks:
>
>        Been thinking about a winter project for the TR6.
>
>        The thing that keeps rattling around in my brain is the fact that I
> always end up leaving the overdrive engaged when I want it disengaged 
> (like
> after coasting down an off ramp). When I pull away from the signal at the 
> end
> of the ramp, I invariably mutter a four letter word when I shift into 3rd 
> as
> the OD engages unexpectedly. You would think I would remember to flick the
> column switch but it seems that I never do, adding to my anxiety about 
> having
> Alzheimer's.
>        I was thinking about designing a black box that sees the inhibitor
> switch open when I down shift, and then locks out the OD until I toggle 
> the
> column stalk again. In other words, the OD disengages and stays disengaged
> until deliberately re-engaged.
>        Before I start sketching out a circuit, does something like this
> already exist? I don't want to reinvent the wheel. I am thinking that it 
> must
> plug into the existing wiring harness with no cutting or splicing, and be
> easily installed in a hidden location. Of course it must work for both A 
> and J
> type ODs too.
>        So, any pre-existing solutions out there? Please give me a 
> hyperlink
> if possible.
>
>        Thanks,
>
>        Vance
>
>      Vance Navarrette
>    Cogito Ergo Zoom
>    I think, therefore I go fast
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