The M1 seemed ok so 6 mo ago I did a 2nd d&f plus LG Red. Out of the blue, the trans is sticky and shifting hard. Does the LG wear out? Anyway, I tossed in the 1000 miles used AMSoil+Z1 that came out of my Accord. What could cause the hard shifting? Can I wait 6 months to do the next fresh AMSoil d&f or do it now? Should I try a softer fluid like ATF+4? btw- I disconnected the battery for a reset.