Brian, I suspect your problem may be a faulty 3rd/4th gear switch on the
gearbox. On mine (a 76) the wiring diagram indicates that *unless* the
car is in 3rd or 4th, the solenoid will not get power. It sounds like
your switch may be bad or the solenoid power lead may be wired straight
through the 3/4 switch. This switch is located on the top of the
gearbox. (The reverse switch - to control the backup lights - is on the
side of the gearbox).
The 3rd/4th switch on my car has a yellow/green wire coming from the
steering column switch and a yellow/purple wire leading to the solenoid.
The other wire on the solenoid goes to a ground connection (the gearbox
case in my car).
If yours is wired like this, you can test the 3/4 switch by checking the
continuity between the switch connections when in the desired gears (3
and 4). If you get continuity in all gears, then the switch is likely
bad and you might need a new one. This is an easy check but only if you
have the top of the gearbox accessible. Of course to do this, you need
to remove the gearbox tunnel cover which requires removal of a bunch of
stuff from the interior.
Good luck,
Peter Zaborski
76 TR6 (CF58310 UO)
Calgary AB Canada
> -----Original Message-----
> From: Brian Day [SMTP:1briand@mail.airmail.net]
> Sent: Monday, November 24, 1997 3:37 PM
> To: triumphs@autox.team.net
> Subject: J-Type Overdrive Problem
>
>
> This past summer, I retrofit my '73 TR6 with a J-Type overdrive
> transmission. I'll admit that I paid someone to do it for me - not
> necessarily because of mechanical incompetence, but because I had
> eight
> month old twins - and I wanted to drive the car again before the turn
> of the
> century.
>
> The transmission works great with one exception. There is no lockout
> as
> there should be for 1st and 2nd gears. On several occasions, I have
> forgotten to switch the unit off and accidentally had the overdrive
> engage
> in 2nd gear. I don't know if reverse lockout works - I suspect it
> doesn't
> as I can here the solenoid click when I toggle the switch while in
> reverse
> with the ignition switch in the on position. I suspect wiring issues.
> I
> don't want to bring my car back to the shop where I had the work
> performed -
> I prefer to fix it myself. Bentley's overdrive wiring diagram is a
> tad
> weak. If anybody out there has a description of how the lockout
> switches
> work, or better still, a wiring diagram, I would be most appreciative.
>
>
> Thanks in advance,
>
> Brian Day
> '73 TR6
> CF 9167U
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