Valvoline Flexfill SAE 75W-90 Full Synthetic Gear Oil 1 QT, Case of 4

I recently switched to this full synthetic gear oil for my differential fluid change, and the flexible pouch design is an absolute game-changer. If you’ve ever struggled with a rigid bottle and a hand pump in tight spaces, you’ll appreciate how easily this nozzle fits into fill holes, allowing you to squeeze out every last drop without the mess. This design makes its less likely to leak the fluid from the packaging. Beyond the convenience, the performance specs are top-tier; knowing it provides significantly better wear protection than conventional oils gives me great peace of mind for long-term vehicle maintenance. It’s a premium, high-quality lubricant that turns a typically frustrating chore into a quick and clean DIY project—highly recommended for anyone who does their own garage work.

Valvoline is great rear-end fluid for my Ford 8.8. Added during a recent fluid and differential cover change. WIth the limited slip additive and Flexfill gear oil, my differential hooks up much better and is definitely smooth as butter. The gear oil bags/packaging are very useful but I still used a hand pump/hose to add back the new oil to the differential. Highly recommended for the health of your differential!

Perfect, used as a maintenance item on a 2019 Ram Rebel as the differential fluid on the truck needed limited slip additive. So far the fluid is doing its job with no leaks. I love how easy it is to fill the differential with the baggy design for the product, brilliant! Great value for the money!

Flex bag makes it so easy. Already has the Limited Slip Additive. Perfect match for my 2016 RAM 1500. Rear rear differential.

The bottle design saved me from having to buy a small hand pump for my transfer case. Overall the fluid is synthetic and at a reasonable price point so it’s a good fluid to use. Of course if you’ve never used gear oil before the smell is normal due to limited slip additives.

These Valvoline lube packs made refilling my differential clean and easy. My Ford excursion had over 220,000 miles and it was time to change the differential fluid along with transmission fluid and oil and transfer case fluid. After this lubrication service I was pleased to receive a 15% boost in fuel economy above the normal 10 and a half miles per gallon I had been getting.

So easy to use under vehicle. Just squeeze and fill up.

Refreshed Rear Diff Fluid on 2020 Tacoma with this Gear Oil... Did not have a lift so did the Ol crawl under and made it happen. I went ahead and dropped the spare tire which had been years since I did and glad I did because the spare only had 10 PSI. Dropping the spare gave me a lot of room and made it easier to fill. The Flexfill bottles work ok but because you have to squeeze them a bit to pick them up a bunch of oil squirts out the top before you can even get it to the Fill hole... Will probably go with the regular sturdy qt bottles next time and with removing the spare tire they will work better to fill...

Great product for my Durango 2018. Highly recommend

El embalaje fácilita la aplicación del aceite al diferencial, el aceite se ve muy bien en tonalidad y viscosidad. Además ya le hacia falta el cambio a mi unidad.

Très bon service et rapide huile de très haute qualité , Merci.

great gear oil for my tundra, shipped super fast at a great price

Good enough