[TR] Speedometer drive in J-type OD

Sujit Roy triumphstag at gmail.com
Tue May 28 08:04:46 MDT 2019


Another source in UK. Overdrive Spares.

On Tue, May 28, 2019, 7:03 AM Sujit Roy <triumphstag at gmail.com> wrote:

> I have a j type on the stag and no brackets are in the way. U can get to
> it. Oil will come out not sure how much. Change two o rings while u have it
> out. Google the no. Of teeth for the 6. I have a j type for a dolomite
> sprint and had to swap out the gear. .
>
>  The no. Of teeth were different as well as the length
>
> Just fty. At the end of the OD is a stamped. On the Stag and sprint are 6
> start. This is the no. Of threads on the big gear in the OD.
>
> Sujit
>
>
>
> On Mon, May 27, 2019, 8:38 PM Mark Hooper <mhooper at indiefilmnet.com>
> wrote:
>
>> Hello oh List:
>>
>> My 72 TR6's speedometer has stopped working completely. It was jumping
>> more and more wildly and now is completely dead. Since the cable seems to
>> turn freely in the casing I'm pretty certain the drive gear down below has
>> just lost too many teeth to engage. Memory tells me the drive is plastic. I
>> have a J-type OD in my car. I ordered it built up by the Laycock de
>> Normanville descendants who work (I am told) with the original tooling. I
>> had it done with the Volvo gearing (1.25). Three questions:
>>
>> 1 - Can I pull the gear out without having to remove the OD ? It looks
>> like it's removable.
>>
>> 2 - Will I end up with a flood of transmission oil all over the place.
>> i.e. should I drain it first?
>>
>> 3 - How do I count/measure to know which replacement gear to buy?
>>
>> Thanks in advance for any helpful advice out there.
>>
>> Mark Hooper
>> 1972 TR6
>>
>>
>>
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>
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