4 speed g'box speedo drive

[Hugh Barnes]

I'm just finishing the refurb of a 4 speed Crash gearbox for the Box Saloon. I have only just realised that the box, rudely awakened from its slumbers of 30 years under the bench, has no speedo drive. Am I right in thinking that all 4 speeed boxes have the same speedo drive fitted, so I can scavenge one from anything?

[dickie65]

The sports box has a different drive ratio for the speedo due to lower axle ratio.
The crash box and early synco boxs should work for you.

[Tony Betts]

hi hugh.

my memory is not the best, BUT several years ago i done a batch of NEW final drive gears for 3 and 4 speed boxes.  

but i think, the crash box was different to the syncromesh. ???

so i made the syncro,a NOT the crash. as the need was not asked for.

it may be the crash is 7 teeth,without the 3 speed peg on the bottom. and the syncro is 8 teeth.

but do excuss me on this because my memory may be wrong.

im sure someone can confirm any differences.

tony.

[Ruairidh Dunford]

The sports box has a different drive ratio for the speedo due to lower axle ratio.
The crash box and early synco boxs should work for you.

I always thought is was the speedometers that differed.

Hugh,

I can help you with the drive you need.

[dickie65]

The EB65 speedo had the cable drive coming in a different angle.
The speedo drive gears have a different part number on the sports models.
When I ran a Box Saloon axle for a while the speedo was under reading by a lot.
With the sports ratio axle back in its very accurate against a GPS.

[Austin in the Shed]

With a bit of cutting about you can get the cable to point upward if you are fitting into an earlier car.

[Hugh Barnes]

Thanks, all, for the pointers, I now can move forward and compete the 'box...