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⚙️ Shift into the future with Castrol TranSynd 668 – where performance meets precision!
Castrol TranSynd 668 Synthetic Automatic Transmission Fluid is a premium, universal-fit fluid designed to deliver superior gear protection, extended anti-shudder and clutch durability, and excellent resistance to corrosion and foaming. Its advanced thermal and oxidative stability prevents deposits and oil thickening, ensuring smooth, reliable transmission performance under all driving conditions.
| ASIN | B095SZB2DK |
| Best Sellers Rank | #4,791 in Automotive ( See Top 100 in Automotive ) #18 in Transmission Fluids |
| Brand | Castrol |
| Brand Name | Castrol |
| Container Type | Bottle |
| Customer Reviews | 4.8 out of 5 stars 1,030 Reviews |
| Item Form | Liquid |
| Liquid Volume | 1 Gallons |
| Material | Synthetic |
| Number of Items | 1 |
| Package Information | Bottle |
| Part Number | TES 668 |
| Recommended Uses For Product | Automotive |
| UPC | 079191219164 |
| Unit Count | 128.0 Fluid Ounces |
D**E
Excellent product
This is an excellent product, I’m very happy with it
W**E
Highly recommend Fully Synthetic oil
Perfect for my Allison 5 split
K**S
Good deal
Just what I needed. Good price and fast shipping
M**5
Only fluid to use in any Allison transmission
Started using Tes fluids 8 years ago in my 2005 duramax. Trans developed a shudder and jerking motion going downhill in cruise control. Called Allison tech support. Was told Dex VI wasn't good enough to protect 1000 series trans internals and seals. Changed to Tes 295 and all trans symptoms disappeared. Did forward system flush to get all Dex VI out of the system. 4 gal. Now I'm using 668. 322,000 mi and the trans shifts like new. Can be used in NP and Magna 263 and 261 transfer cases . I do a pan drain every 2 years and canister filter every 12 mo. The cleaner the fluid the cooler it runs.
T**S
Great great
👍🤠
R**N
Care in OPERATION and maintenance allows me to have reliable, never failed, transportation!
Was usable with no bad effects in 2002 GMC seirra2500HD ALLISON TRANSMISSION/Duramax6.6. No wrenches on transmission or motor in 25 years. Change fluids in power steering, radiator, autotran, and motor. Change power steering and serpentine belt every 10 years. BEFORE STARTING -twist key ONLY to on- USE THE LITTLE PENCIL ERASURE SHAPED BUTTON LEFT CORNER OF DASH PRESSING 3-4 times till BELL SOUNDS and lights go out and EXTRA POWER DIVERTS TO STARTER MOTOR FOR FASTER SPINS. I’m still on first motor starter because of this. NOW TWIST KEY TO START POSITION AND RELEASE NOW AGAIN button pressing for audible BELL and LIGHTS COME back on.
R**F
Can’t go wrong with this transmission fluid
Best trans fluid for my Duramax with the Allison 1000 Came over night and less cost than the auto stores that don’t even stock it
M**N
Matches Manufactures Spec.
This is a harder to find Transmission Fluid. It was easer to order it through Amazon than trying to find it on a Saturday.
E**T
Fully synthetic only way to go
I’m giving it 5 stars because it’s fully synthetic, I’m only expecting the best, the trailer will be the test
B**Y
Fast and good service
Everything was fine as described
K**W
It's the best for Alison transmissions
My chevy is 7 years young now and I swap out the external filter yearly and change out the oil every 2 years. Never ever had a problem using this oil. And I only use Alison filters BTW
K**R
Allison transmission filter & fluid.
Excellent product, good delivery.
M**L
Arrived on time and as ordered. why after purchasing items that they are offered at a lower price?
Arrived on time and as ordered. why after purchasing items that they are offered at a lower price?
Trustpilot
1 month ago
5 days ago