3rd and 4th longer gear question.

[syncropaddy]

if you want the actual clock doing speedy cables do it. but the gears in the diff can be swapped about to alter the ratio too.
atm i`m 2 mph slow @ 70mph which is pretty acurate. i would rather be over on the speedo so i need to swap about again.

Yeah, Aidan and I discussed the drive gears when we discussed the rebuild of the box but there was nothing to suit so I opted to leave it as it was and buy a Sat Nav instead !! I calculated that Im about 16% slow on the speedo and the sat nav verifies that to within 3 kms/hr so Im happy with that. Where abouts are Speedy Cables and what sort of charge would be on work like that?

[syncroand101]

Jed - I have the spreadsheet if you want to have a play when you come look at this roof..

I'm sure there used to be a little speedo adapter that used to sell an adapter that went on the side of the gearbox and adjusted in different %'s

I'm running 235-75/15 on a 4.86 and it is almost exactly 10% underreading on the speedo.