View Full Version : TR2/3/3A Early TR3A Overdrive relay location

06-08-2012, 08:58 AM
Can anyone advise me where the overdrive relay is mounted on an early 3a?

I inherited my car with a box of parts so I am flying blind on some of these things. Without the luxury of having taken the car apart myself I can only go by pictures I've seen - I do have one showing it mounted to the battery box, but its a 66000 car - not sure if it's correct for an early 31000 car - mine doesn't seem to have a screw hole here.

Photo appreciated. Thanks in advance,


06-08-2012, 12:03 PM
On early cars that came without the OD, you have to add the holes. Here's a shot from the workshop manual, showing where to locate the holes. The illegible text says the LH hole is 2-3/8" from the LH edge, both holes are 1/2" above the bottom, and the holes are spaced 2-3/4" apart (center to center).

06-08-2012, 03:38 PM
Thanks Randall. Picture is a bit fuzzy - those dimensions are on the battery box, so my picture is pretty close if not exact, correct?

06-08-2012, 05:02 PM
Yes, dimensions are on the back of the battery box. Sorry for the poor quality, that's the best I could do from the original I have.

06-08-2012, 05:23 PM
No problem at all! That's awesome - exactly what I needed. I now know what I'm doing tomorrow ;-)

06-08-2012, 07:29 PM

The holes are I believe countersunk too so the screw head does not portrude in the battery box.