TRIAX Trans Zero 20W-50 Full Synthetic Hydro-Static Transmission Oil for Zero-Turn Mowers (1 Gallon)
$39.99
Price: $39.99
(as of Oct 22, 2025 13:51:13 UTC – Details)
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Compatible with SCAG, Toro, Ferris, Snapper Pro, Gravely, Ariens, Exmark, Walker, Hustler, Wright, Dixie Chopper, John Deere, Husqvarna, EverRide, Bad Boy and Cub Cadet hydrostatic transmissions.
True all season fluid, -50F pour point and outstanding high temperature stability for continuous functionality in the summer. Virtually zero deposits and extremely high resistance to shear.High Zinc concentration, preventing gear scuffing and glazing
Commercial Grade – Maintains mower speed, flawless transmission operation on varied terrain, high grass, high loads. Excellent oxidation stability.High viscosity and high film strength, effectively preventing metal to metal contact. Extremely long fluid life, up to 3 x OEM drain intervals
Excellent corrosion prevention, lasting up to two years in storage conditions
Ideal for use in commercial applications with long operating hours. Replaces all OEM hydrostatic transmission fluids for zero turn mowers requiring a 20W50 or high viscosity grade fluid.
Customers say
Customers find this transmission oil to be of high quality, working well and making their mowers run like new again. The oil is praised for its smooth operation, with one customer noting dramatic improvements in torque response, and customers appreciate that it’s noticeably quieter. They consider it good value for money, and one customer mentions it’s specifically developed for hydrostatic transmissions. While most customers report no leaks, one mentions receiving a leaking package.
13 reviews for TRIAX Trans Zero 20W-50 Full Synthetic Hydro-Static Transmission Oil for Zero-Turn Mowers (1 Gallon)
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michael antenucci –
Excellent Synthetic Oil â Perfect for My Cub Cadet LTX1045
I used this TRIAX 20W-50 in the hydrostatic transmission of my Cub Cadet LTX1045, and it works flawlessly. The mower runs smoother, quieter, and cooler compared to conventional oil. Shifts are consistent, and I can tell the transmission is protected even under heavy mowing conditions. This oil is high-quality full synthetic, designed specifically for zero-turn and garden tractors, so it gives peace of mind that the hydro system will last. A gallon is enough for service with extra left over, making it a solid value. If you want long-lasting protection and smoother performance for hydrostatic mowers, this is the right choice.
aleykhat –
Must use for hydrogear transmission
Only place i could find it at good price, nice fluid for mower hydrostatic transmission. Performance and quality.
DJfromGA –
Wow, what a difference!
Exceeded my expectations!I could immediately tell a dramatic improvement in the torque response and also a much smoother push/pull on the controls. It really made my hydros function better than new. I’m really glad that I went with this brand and I’m impressed with the quality!
Hunter –
ZTurn magic
This is what your transaxle needs, great stuff
Porkchop –
Runs like new, with less whining noise!
Second transmission service to my Husqvarna MZ5225 mower with Hydro-Gear ZT-3100 transmissions. I must say I have now mowed the grass several times since the switching to this oil. Everything runs like before except for one thing. I have noticed a huge decrease in the transmission noise. Gone is much of the whining noise. To be honest I don’t know if I did a better job of purging the air from the transmissions this time or if it’s the oil. Maybe both? This oil is made for mower transmissions like mine so I figure it has some sort of better additive package than just using a high quality fully synthetic motor oil like I did the last time. Anyway I am convinced using this oil made specifically for this purpose is better. My only problem with this product is it only comes in a 4 quart jug. My transmissions needed between 4 to 5 quarts so I had top the transmissions off with a partial quart of Lucas hydrostatic transmission oil. I really wish this came in a 5 quart jug or their single quarts which they sell weren’t so expensive!!! So to finish this review up I’ll just say I would definitely use this product again. Much quieter transmissions even quieter than the factory fill, not just the last one I did.
giacomo –
New hydrostatic oil turned the old cub cadet into a brand new machine
Use this in my wifeâs zero turn cub cadet Ultima hydrostatic was time to change the hydraulic hydrostatic oil. This worked real good. The new oil is full synthetic and makes the hydrostatic drive a lot quieter. She notices the difference. Mom is happy. Iâm happy so far we havenât had any problems. Check the oil. The oil seems fine. The value for the money was decent. Took a little time to drain out the old stuff to get the new fluid in.
Leroy –
hydro oil
worked good but I needed about a half quart more for my Gravely zt48 hd
Roger Caron –
Zero turn mower transmission fluid!
Oil quality:I believe this oil is quality productValue for money:Â It less expensive than OEM and probably as good as, maybe better!
Mr Rafraffy –
Bon produit, pratique
Lada –
Bra
Mrs AJW –
My husband searched everywhere for this product for his new ride-on mower. Just the ticket.
Amazon Customer –
Ho appena sostituito l’olio del idrostatico del mio trattorino Toro. Va molto bene, ma bisogna ripetere lo spurgo dell’aria almeno 4/5 volte prima che la trazione funzioni bene. Se soprattutto in retromarcia e sotto sforzo “strappa” meglio ripetere lo spurgo dell’aria qualche volta.
Karsten M. –
Ãl von bester Qualität! für das Hydrostat Getriebe meines Rasentraktors. Der Traktor fährt damit sehr gut.