[TR] Overdrive and Sppedometer

[Sujit Roy]

I don't know much about TR6. I installed a J type overdrive in a Stag. At
the back of the inside of the OD is a gear which rotates the Speedo drive.
This needs to match the odo meter.. On the stag I recall the gear inside is
a 6 start and the drive gear is an 18 tooth gear. Look at my blog. There is
a no. Stamped at the back of the OD. Very small. This tells you what gear
is in the OD.

On Mon, Aug 24, 2020, 6:54 AM Geo Hahn <ahwahneetr at gmail.com> wrote:

> Jeff - I think the important thing is whether your odometer is (more or
> less) correct.
>
> If the odo reads right then you may only need a simple adjustment to
> needle position... something you can probably do sitting at the dining room
> table.
>
>
> On Mon, Aug 24, 2020, 6:14 AM Jeff Scarbrough <fishplate at gmail.com> wrote:
>
>> I have a 1975 TR6.   With the original gearbox, the speedometer was
>> correct.  I took it out to add overdrive and put in a gearbox from a 1974
>> while I worked on it.  That gearbox made the speedo read about 12% higher.
>>
>> Got the overdrive on the box and in the car.  My speedo still reads
>> high.  I'd like to find a simple solution...
>>
>> Do I try to find the right drive gear for the gearbox output, or do I get
>> a different speedometer?
>>
>>
>> Jeff Scarbrough
>> Corrosion Acres, Ga.
>> ** triumphs at autox.team.net **
>>
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