Question - Type 9 Gearbox, speedo output.

[Kayheggz]

Hello,

Thought I’d save myself some time and try my luck asking you guys in here for advice.

I have a later model type 9, which I am planning to squeeze into a ’59 Thames 300e along with a Zetec blacktop.
But the trouble being that this gearbox has the electronic speedo sensor, and no slot for wire output.
I have searched various forums and came across alot of good information, however not any info that answers the questions below.


My options and questions are

Option 1; Changing tail shafts

• Are the tail shafts interchangeable between 4. and 6. cyl. applications?
  (I have several V6 gearboxes on shelf.)

Option 2; Machining an adapter

• Would it be possible to machine an adapter to fit a speedo wire to existing worm gear? -I have the machining drawings in mind, and access to all neccesary machines.
  • From what I understand normal ratio is approx. 3.57 with 7tooth worm and 25tooth gear.
    Would it work if I make a 18tooth gear to accompany the 5tooth worm for el.-speedo? This would give me approx. same ratio.

I’m sure that the most reasonable thing to do would be to just go electric speedo and be done with it, but I do want to keep the original 120km/h unit.
To see how fast I can bottom that sucker out. Hehe..


Best Regards


Mr. Kay Heggset
N-6408, Aureosen, Norway
Mobile: +47 966 23 227
Mail: kay_hegg@hotmail.com

[Tpau]

Throw money and tech at the problem?
https://www.streetmusclemag.com/news...-really-works/
/T