Customer Ratings & Reviews

Recently took possession of a 2019 GMC Sierra 1500 w/10-speed automatic transmission. Definitely noticed some transmission slipping and hard shifts from time to time. Have read all about the problems people have been having with this transmission. Changed the transmission fluid out for the Amsoil Signature Series ATF and immediately noticed a smoother, more consistent transmission performance. Would definitely recommend anyone with the GMC 10-speed transmission make this change!

Better than oem

Shipped fast and was correct amount for fluid and filter change. Shifts smooth and should last another 100 k miles. Love all ams oil products.

It gets plenty hot in the summer down in Louisiana. I use Amsoil transmission fluid to keep my trans cool and pulling.

Phase 2 done. Transmission, Transfer case, both Differentials. Cooling system left to do for 100%

Changed transmission, transfer case, and both differentials. Shifting is smoother, especially when towing my RV. Mechanics liked the easy handling of the "pouch packs".

did 3 drain and fills (3 of 7.6 QT) and calculate about 80% of old fluid exchanged. I noticed quieter smoothing shifting after the first one. so far very happy. i feel this fluid is better than the OE mazda fluid.

Ma transmission avait de la misère à se rendre sur le dernier rapport, depuis le changement d'huile, elle fonctionne comme une neuve. De plus les contenants flexible simplifie beaucoup la vie lors de l'entretient. Merci Amsoil!

Drained and filled 2015 honda odyssey, had that low rpm surge. Went away with 4 qts, will drain and add 4 more quarts after some miles. Immediately improved driveability.

Truck shifts much more smoothly, and with way less slippage.

IMHO this is the best ATF one can use in their automatic transmission.

I use nothing but Amsoil lubricants in my 2016 GMC 2500hd . I put my trust in them to keep her in tip top shape .

Performed a 50,000 mile maintenance on my 19 Jeep Wrangler JL so decided to replace all fluids/oils with Amzoil Signature Series products. Used this in my ZF8 speed auto tranny. The shifts are smooth and enhanced the smooth performance of my ZF transmission. I go deep in the back country across the USA overlanding and need to insure reliability since the conditions are out of the norm with high elevations to high heat. Signature Series seems to work great.

It was time for the first fluid change in my 2019 Silverado 1500 with an eight speed transmission. Pan drop, filter change and then filled/cycled Amsoil Signature Series through oil cooler return line until it ran clean cherry red fluid. Topped off at proper transmission temperature and then drained the fluid from the transfer case and refilled it with Amsoil SS ATF fluid also. Afterwards I could feel the difference, especially in the lower gears as they seemed to shift with a little "bite" from one gear to the next. Truly pleased with the performance!

Je recommande vraiment cette huile, la meilleur que j'ai acheter! Je vois vraiment la différence entre les rapports comparément au autre huile. Et je connais plusieurs personne qui sont aussi satisfait que moi.

Very highly recommend the best you can get!!

Best transmission fluid money can buy

Excellent product. Could feel the difference with my truck after draining and filling the transmission fluid in my truck.

Transfer case fluid change was a breeze with the easy pour packaging. Satisfied customer.

Lexus rx350 2014 138k miles. My. Ar was over shifting/under shifting and shuddering at times in gears 2/3/4. I did a drain and fill with fill and the improvement was remarkable. I'll do another in a few hundred miles. Amsoil saved the day.