My Allison has experienced delayed engagement a couple of times after sitting. She has 35,144 miles so is still under warranty, but I just put in $160 worth of synthetic ATF, and this would kill me to lose that. Should I have GM fix the leakdown before 36K or just let it idle in neutral when it happens and live with it? I am going to Fl to pick up tow my Dad's car to Ohio in May, and will run over the warranty, so need to do it "right now" if I am going to do it. Thanks.