I will be towing a 300lb motorcycle on a small trailer. I had my tranny worked on and looking at the parts list it had the normal parts like solenoid and 4th gear hub along with shift kit and lots of other random parts and my question is is it safe to tow with it if I'm gentle? Does the new hub have hardened splines or are they the same as what was going out? My car never had issues with shifting into 4th it was just the high pressure which caused jerky shifting once driven for a long time. Thanks