ok then based on the article -

1) “The previous MOPAR ATF+3® formulation was discontinued in 2005 and ATF+4® is recommended for all transmissions filled with ATF+3®.”

2)"You can use ATF+3 with all older Chrysler transmissions"

then i should be able to use 4 in my 1969 727 right?

and what is meant by 'shearing'?? shruggy