What kind of transmission/hydraulic fluid do all you L5450 owners use. Mine is a 1996 and of course the Kubota dealership is saying I should only use the Kubota UDT fluid which is around $85 for a 5 gallon bucket. I used the case hy- tran last time I changed the fluid but that stuff is way expensive and now hard to find since I moved. Is there a cheaper alternative that works without sacrificing protection? Thanks for any info you can provide.