...my 10cents worth!
.........the logic behind testing a used trans oil
sample is not my way of thinking.My logic dictates
that if I wanted to try a 'Brand X' lube I would carry
out checks before I put it in the trans.The baseline
spec is the Ford WSD-M2C200-C for both
life,performance,component wear,shift speeds etc
already exists.I think we can take it as a given that
the Motorcraft lube(made by Castrol) has meet the test
specs.I'd be more inclined ,in the absence of a 'Brand
X' lube without the Ford spec/test results,to do a
chem/lab analysis and at least check if the 'numbers'
were even close...which I did.I can't subscribe to a
test proceedure that just puts a Brand X lube in the
trans then does the analysis on a failed trans
lube.Maybe you think it's backwards but with some
'known' info Re Ford test spec,lab tests why would you
put anything that doesn't match/come close to those
results in,it's the obvious 'start point',why ignore
it??
