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+--- Thread: 4 speed g'box speedo drive (/showthread.php?tid=7035)
4 speed g'box speedo drive - Hugh Barnes - 02-01-2022
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?
RE: 4 speed g'box speedo drive - dickie65 - 02-01-2022
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.
RE: 4 speed g'box speedo drive - Tony Betts - 03-01-2022
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.
RE: 4 speed g'box speedo drive - Ruairidh Dunford - 03-01-2022
(02-01-2022, 10:24 PM)dickie65 Wrote: 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.
RE: 4 speed g'box speedo drive - dickie65 - 03-01-2022
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.
RE: 4 speed g'box speedo drive - Austin in the Shed - 03-01-2022
With a bit of cutting about you can get the cable to point upward if you are fitting into an earlier car.
RE: 4 speed g'box speedo drive - Hugh Barnes - 03-01-2022
Thanks, all, for the pointers, I now can move forward and compete the 'box...