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Item #:
75254127
Castrol TranSynd 668 Full Synthetic Automatic Transmission Fluid, 1 Gallon, Case of 3
86% of respondents would recommend this to a friend
Item #:
75254127
ANG 293
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Imported from USA store
QTY:
Only 67 items left in stock.
Order now and get it around Saturday, September 26
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Delivers improved gear protection, extended anti-shudder and clutch-friction durability
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What Stands Out
Full Synthetic Formula
Castrol TranSynd 668's advanced full synthetic formulation enhances performance under high stress, ensuring smoother shifting and improved efficiency compared to conventional fluids.
Extended Longevity
Designed for extended drain intervals, this fluid maintains optimal performance longer, reducing maintenance costs and downtime for vehicle operators, making it ideal for commercial use.
Wide Compatibility
Compatible with a range of automatic transmissions, TranSynd 668 offers versatility, catering to a large audience from everyday drivers to fleet operators seeking reliable fluid solutions.
Product Details
- Premium full-synthetic automatic transmission fluid for Allison Transmission® on-highway automatic transmissions
- Delivers extended anti-shudder durability and extended clutch-friction durability
- Allows for extended drain intervals of up to 300,000 miles or 48 months in general-duty transmissions and up to 150,000 miles or 48 months in severe-duty transmissions
- Provides excellent shear stability, thermal and oxidation stability, and corrosion and foaming resistance
- Superior high-low temperature performance due to full-synthetic base fluids
- Recommended for use with Allison TES 668, and backwards compatible with Allison TES 295
| Product line | TranSynd |
| Vehicle make | Allison |
| Size | 3 gal |
| Features | Top Engine Performance |
| Multipack quantity | 3 |
| Compatible cars | Allison TES 668â¢|Allison TES 295|Allison TES 468 |
| Automatic transmission fluid type | Synthetic Transmission Fluids |
| Brand | Castrol |
| Volume capacity | 3 gal |
| Vehicle model | Allison TES 668â¢|Allison TES 295|Allison TES 468 |
| Piece count | 3 |
| Item Weight | 22 lbs (9.98 kg) |
Who Should Buy?
-
Heavy-Duty Vehicles
Ideal for trucks and buses needing high performance under extreme conditions, enhancing transmission life and efficiency.
-
Fleet Operators
Perfect for businesses managing multiple vehicles to ensure optimal transmission performance and reduce maintenance costs.
-
Performance Enthusiasts
Great for auto enthusiasts who demand superior transmission performance and reliability in high-performance applications.
-
Standard Cars
Not suitable for everyday cars that require conventional ATF, as it may exceed necessary specifications.
Product Description
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
What are the drain intervals for this fluid?
Answer: Up to 300,000 miles or 48 months in general-duty transmissions and up to 150,000 miles or 48 months in severe-duty transmissions. -
Question:
Is this fluid compatible with Allison TES 295?
Answer: Yes, it is backwards compatible with Allison TES 295 applications. -
Question:
What is the recommended applicator for this fluid?
Answer: The recommended applicator is Allison TES 668.
Castrol Castrol Auto Transmission Fluid Editorial Review
Castrol TranSynd 668 Full Synthetic Automatic Transmission Fluid, 1 Gallon, Case of 3 is recognized for its compatibility with Allison transmissions, ensuring top engine performance and smoother shifting even in older models with high mileage. Users have noted significant improvements in their transmission's function, especially when towing. The fluid's vibrant red color and pleasant smell add to its appeal. It is widely recommended as a preventive maintenance measure, indicating its reliability and effectiveness over time. Many choose this synthetic fluid for its proven performance in high-demand situations, making it a popular choice among truck enthusiasts.
Customer Reviews & Ratings
48 customers ratings
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5 Star
85%
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4 Star
4%
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3 Star
8%
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2 Star
0%
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1 Star
2%
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Pros
- Compatible with Allison TES 668 and TES 295
- Enhances shifting performance in older transmissions
- Recommended for preventive maintenance
- Vibrant red color and pleasant aroma
- Pack of three gallons for better value
- User-friendly for both casual and professional use
Cons
- Availability can be limited at local stores
Platform Trust & Buyer Confidence
JK
Jasmin
Verified buyer
“Great products and very good service: very easy and very fast international delivery.”
9 September 2026 · via Trustpilot
AG
Anke
Verified buyer
“Wonderful online shopping experience, smooth transaction from the start. Payment method works conveniently and delivery is unexpectedly fast and reliable. You go the extra mile for service. What makes this even more amazing, you deliver to Namibia. I will remain a happy Ubuy customer and will increase my purchases for sure! Thank you!”
10 September 2026 · via Trustpilot
H
Hazel
Verified buyer
“Very easy to find the products what you need, and so fast delivery, that’s why I highly recommended to others costumers to used ubuy.”
10 September 2026 · via Trustpilot
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Opaleye
Verified buyer
“I received exactly what I ordered I was skeptical about your site because that was my first time to order. But the order came timely and neatly packaged. I was not disappointed. Thank you.”
11 September 2026 · via Trustpilot
AC
Adele
Verified buyer
“Easy to find and order what you want on the website. Delivery is quick to the UK”
8 September 2026 · via Trustpilot
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ANG 293
Order now and get it around Saturday, September 26
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QTY:
Only 67 items left in stock.
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Features & Benefits
- Extended drain intervals of up to 300,000 miles or 48 months
- Provides excellent shear and thermal stability
- Superior high-low temperature performance
- Excellent corrosion and foaming resistance
- Specifically formulated for Allison Transmission®
- Backwards compatible with Allison TES 295
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