Jack Brooks wrote:
>
> Matthew,
>
> There are a lot of conflicting publications out there. The A and J types has
> been used in many marques, including Volvo and A-H and both gear lube and
> motor oil have been specified at various times.
AFAIK, Laycock (the OD mfgr) has always recommended motor oil, and in
fact the A-type service manual has a specific warning against using
"extreme pressure gear" oils.
Triumph originally said motor oil, but switched their recommendation
sometime in the early 60's. According to Ken G. this was in response to
some early gearbox failures. I've been following Ken's recommendation
of Valvoline 20W50 Racing oil for several years, I'm quite happy with
the results.
Randall
59 TR3A daily driver
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