I have a single rail gearbox, recently assembled from a mix of new and
used parts, and now with a noisy 2nd gear (all the rest are OK).
Gear End floats etc are all within spec. All new bearings, thrusts,
syncros etc. The problem is not a fundamental assembly one
There are no obvious internal problems except a bit of a scuff mark on
the very tips of mainshaft 2nd. gear, so I suspect a gear mesh problem.
The layshaft 2nd gear has 21 teeth and is 2.25" diameter
The mainshaft 2nd gear has 26 teeth and is 2.74" diameter. There is a
small step on the bearing face of the gear, indicating a very late spec
Both gears have a 35 degree tooth angle
Can anyone confirm these are the correct matched pair with teeth count
and diameter???. I am aware that within the Leyland group there were a
multitude of ratio and helix angle changes with this style of box, so I
am wondering if I have a (non-obvious) mis-match of gears.
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