[TR] Over Drive Question

[Dave1massey at cs.com]

In a message dated 11/28/2007 8:27:41 AM Central Standard Time, 
JStasyszen at odmhsas.org writes: 
> 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.

That part on the top of the transmission is a lock-out switch.  It will close 
whenever the gear selector is in 3rd or 4th gear.  This will enable the 
solenoid and engage the overdrive (if the switch in the knob is closed).  This will 
prevent overdrive engagement in 1st, 2nd or reverse.  This switch should be 
wired in series with the solenoid.

I don't have the Spitfire schematic handy but it should show how these three 
items are interconnected.  You can compare your harness against the wiring 
diagram and determine if it is correct.

Cheers

Dave