I had a 129 that my Dad bought new. I used it for years to mow and plow snow. I never put and thing but CC Hytran in it. I bought a new 3184 to mow my grass,but still used the 129 for the snow. The engine finally blew around 2012, so I bought an old 108 to plow snow. After a couple years, I finally got tired of the manual lift on the plow. Age had a lot to do with that. So, in 2017,I found a used 3225, with a plow . I picked it up and the gentleman, gave me a jug of Hydralic oil from Tractor Supply. I took the 3225 home and it didn't seem to have the forward speed, that my 3184 has. I changed the Tranmission filter and fluid, and put in Drive System Plus, and it runs a lot better. I only put what the manual says, in any of my vehicles. I didn't engineer it. If it costs a little more,it is worth it to me.