[TR] TR4 overdrive

[TERRY SMITH]

I am in the throes of something similar. Before pulling the tranny cover, try looking at the wiring at page 49 of https://drive.google.com/file/d/0B2H2NJt34OffNjQ4MTkyNjItZTVmYi00M2U2LWJhYWUtMjEyZDgxMzUyNzUw/view. I'm going to look tomorrow, but I suspect my intermittant (driving me crazy) problem is with the source of power to the Overdrive. Since I'm getting an intermittent charge problem at the same time, I'l going to look at the wires coming from the generator, which apparently powers the OD. Good luck and keep me posted!

> On July 21, 2017 at 6:06 PM dave <dave at ranteer.com> wrote:
>
>
> I'm assuming it needs an overhaul.
>
> Topping off fluid makes no difference (it really wasn't low)
> When I have the car turned on but not running, in 4th gear, engage OD with
> the car on jack stands I hear the thunk
>
> Almost never engages; sometimes when I let off the throttle it seems to drop
> too much, then rev higher than expected when pressing it back down.
>
> It used to work . . .
>
> Early TR4 - 1962, original overdrive transmission I think. I'm third owner;
> I've had the car operational for about 2 years now. I found it languishing
> in a barn where it had sat for 25 to 30 years. Rebuilt engine and carbs,
> redid all the hydraulics, replaced all the fluids, etc - all the stuff you
> have to do with a sleeping car. fixed a few other things here and there.
> Car drives fine and the overdrive worked great.
>
> Obviously I don't know the history of the transmission, other than the car
> originally did come with overdrive. Tran shifts just fine; but I seem to
> have lost the overdrive in the last few months. Haven't taken the
> transmission tunnel off yet.
>
> Any other tests I should do?
>
>
>
>
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