I believe this is the reason that they upgraded the pinion plate to steel on the newer models, to prevent damage and why there is a cecco aftermarket part as well. I'm not sure why it happens but lots of reading on it in past threads.
Latebird - are you suggesting that the Polaris demand drive fluid is too viscous and that most times in the cold ,ATF would be better - especially in really cold and not just cool temperatures?Oil in the front gear case either too heavy or contaminated (usually by water)
It is a concern - you should try to avoid actions that cause the problem - it may damage the gear case either internally, externally or both. Change the oil in the gear case and fill with ATF to see if that eliminates the problem.
Is the Type F Mercon preferable in all (but especially in really colder) situations - over or just a cheaper alternative to the Polaris Demand Drive stuff in your estimation though?I use ATF type F or Mercon almost exclusively - I use Honda two stroke transmission oil if ATF type F is not available
Thanks I may consider using the F instead - I also have some PS-4 engine oil - but have heard others say Klotz or Amsoil is better - do you have any idea if that is true and if so which one would be the 'ultimate' type and grade to use over the PS-4 stuff in your estimation for a 450 HO engine - especially for cold Winter usage?Type F is formulated not to promote slip of the clutches of automatic transmissions - type C does promote slip - really does not make a difference when lubricating between the faces of the gears, but I have all Ford products and the type F works equally well in my dirt bike transmissions. So I have plenty of it on the shelf of my garage. Polaris DDF may well be ATF with a different label, but I find ATF type F works as well as DDF and AGL - so one oil for two applications.
I use Klotz not because it's better, but because it's what I like.Thanks I may consider using the F instead - I also have some PS-4 engine oil - but have heard others say Klotz or Amsoil is better - do you have any idea if that is true and if so which one would be the 'ultimate' type and grade to us over the PS-4 stuff in your estimation for a 450 HO engine - especially for cold Winter usage?