Speedometer adapter for 4.30 gears?

[XH29N0G]

Anyone using an adapter when running low gears?  I installed a Tremec transmission and have 4.30 gears.  The 23 tooth speedometer driven gear is very flimsy and wore out very quickly.  I am considering using a ratio adapter and a gear with fewer teeth.  Does anyone have experience with this type of set up?  Does anyone have recommendations on where to get one?  I would like to keep the mechanical speedo.

Thank you.

[A383Wing]

any speedometer shop can make one...they will need to know both your reading speed and actual moving speed to calculate correct adapter....they ain't cheap though....

[XH29N0G]

Thank you.  So best to find a local place.

[Dino]

Tremec?  What type?  Details man, details!   

[XH29N0G]

This is a hurst driveline unit (TKO 600).  I did not do the install.   I still have to correct the driveline angles some more, but so far, I like it a lot.  I am also still learning how to drive the car. 

[John_Kunkel]

You have 4.30 gears and are using a 23-tooth pinion?

Must be running 24" tires.

[XH29N0G]

John,

Not 24 " tires, but I am curious whether there is another option to change. 

I am running 175 60 15s (I think 28")  I may drop back to a 27". 

The 23 tooth driven gear is a ford part for the tremec I have and is as high as it goes.  There is a drive gear inside the transmission, that I think is 7 tooth.  Are there other options?