[Spits] Over Drive Question

[Doug Braun]

If the "solenoids" are on the transmission itself,
they are actually switches.  One would be for the
reverse lights, and the other would be to activate the
OD only in 3rd and 4th gear.

I believe the J OD does not need a relay to activate
it, so the wiring is pretty simple:  Power from the
ignition, through the 3/4 switch, then to the main
solenoid, then to the gearshift switch, and finally to
ground.

Or maybe the the gearshift switch is before the
solenoid, but that would require both its connections
to have 12-volt power, with an added risk of
short-circuits.

BTW, the Haynes manual would tell you all you need to
know.  Amazon.com stocks it for something like $12.00.
 If you are doing anything more complicated than
changing the oil, it would be well worth the
investment.

Doug Braun
'72 Spit



--- "Stasyszen, Jerry" <JStasyszen at odmhsas.org> wrote:

> Hello all, I have a J Type overdrive I am going to
> install in my 76 Spitfire.
> It has a wiring harness attached to it but none of
> the wires are hooked up.
> There are two solenoids on the transmission, one
> below the gear shifter that
> is a three inch cylindrical solenoid with two male
> wire poles that are not
> marked another smaller pancake looking solenoid on
> top of the transmission
> that also has two male wiring poles that are not
> marked. Can anyone tell me
> which wires go where, I am not even sure if the
> wiring harness is the correct
> one. The overdrive is from a 77 spit with UK
> markings FRXXXXX.