The 5 speeds I have seen had a 4.833 diff ratio and 0,82 fourth gear.(3.96 final drive)
This is taller, but very close to the stock 2lt bus box over all ratio of 4.57 and 0.88.(4.036).
There were some late 4 speeds that had the 4.57 dff and 0.82 4th gear, but seem less common than the 5 speeds in Australia.
It should be noted that the 4 speeds came with selector shaft in the :
nose,
or side of nose cone,
or side of gear casing.
The five speed only came in side shift,
which the selector shaft comes from the side of the main casing,
so will not fit easily in earlier buses.
The 5 speed transporter box is essentially a four speed with a low first gear.
4th/5th gear CAN be improved at a rebuild.
westi wrote:That's mad Alan.