Since the mowing season is getting closer, I am beginning to do some maintenance on my mowers before the season starts. I bought 2 gallons of Mobil 1 Synthetic 15w-50 and 2 filters to do a oil change on the Grasshopper 718K transmission. I opened the box where all the oil change stuff was and I discovered that when I ordered filters they had sent me 2 Stens filters. They are a bit shorter than the OEM filters but the part number matches up. This is my first transmission oil change and I am already a tad bit nervous because I cant afford to tear this mower up, but I have never used these aftermarket filters before. Can I go ahead and use them without the fear of tearing my mower up, or should I order some Grasshopper filters.