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⚙️ Keep your transmission running smoother, longer — because your ride deserves the best.
Castrol TranSynd 668 is a premium full-synthetic automatic transmission fluid designed specifically for ALLISON transmissions. It offers industry-leading extended drain intervals up to 300,000 miles in general-duty use, exceptional shear stability to maintain viscosity, and enhanced gear and clutch protection. Packaged in a convenient 5-gallon pail, it delivers superior performance and value for professional-grade vehicle maintenance.
| ASIN | B0977Q8S49 |
| Best Sellers Rank | #25,628 in Automotive ( See Top 100 in Automotive ) #85 in Transmission Fluids |
| Brand | Castrol |
| Brand Name | Castrol |
| Container Type | Pail |
| Customer Reviews | 4.7 out of 5 stars 333 Reviews |
| Global Trade Identification Number | 00079191219638 |
| Included Components | Transmission Fluid |
| Item Form | Liquid |
| Item Weight | 38 pounds |
| Liquid Volume | 640 fluid ounces |
| Manufacturer | Castrol |
| Material | Synthetic |
| Model Number | 15E2E0 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Package Information | Pail |
| Part Number | 15E2E0 |
| Recommended Uses For Product | Automotive |
| SAE J300 Viscosity Grade | 5W-40 |
| Specific Uses For Product | Specific vehicle and transmission types, enhancing performance and longevity |
| UPC | 079191219638 |
| Unit Count | 640 Fluid Ounces |
D**6
Great deal.
Good stuff for Allison Transmissions. Convenient to get it in a bulk size, off Amazon of all places. Sale price was good too. Very happy..
D**R
Arrived with NO leaks
Much cheaper than buying single gallons of this stuff. Works fine. LLY Duramax.
J**K
Check your manual for fluid type, TranSynd isn't for every transmission
Perfect, Castrol is a quality product and recommend for the Allison 3000 in our 2003 Newmar Diesel pusher. As most all items from Amazon it arrived fast. if your thinking about changing yours, check your manual and make it requires TranSynd, your Allison Transmission will Appreciate it.
R**E
great quality
great product great value
L**R
SAVE YOUR CASH
I looked at this product for a transmission service - double flush takes 8 quarts times 2 - so four gallons at about 45 bucks per gallon = 180 dollars. Here you get five gallons for about 160 dollars. Save 20 and have a gallon in reserve! And don't worry about kicking over five gallons onto your garage floor - this comes with a pour spout! They even deliver it laying on its side.
A**N
can you believe that you can just buy a 5 gallon bucket of transmission fluid on amazon
legit did the double fluid change on my 2019 chevy 2500 since i didn't know when it was done last or what kind of fluid and it has 126k miles. she shift so SMOOTH now it's wonderful it makes me so happy that my truck is happy :3 also very glad to know that i won't have to do this again for a very long time with this stuff. 300k fluid change interval is insane lol my advice tho: get a good pail pump that lists how much fluid per pump so you're not guessing and having to check the dipstick a buncha times and a long hose so you're not having to lift a big 5 gallon bucket into your truck's engine bay lol
M**S
Good
Good
J**F
Good quality for Allison MD3060 transmission.
Transmission runs cooler in my freightliner motorhome with this while towing my jeep.
Trustpilot
1 month ago
3 weeks ago