Castrol Transynd 668
Castrol TranSynd 668 is a premium, full-synthetic automatic transmission fluid specifically formulated for Allison Transmission® on-highway automatic transmissions. It provides oxidative stability, anti-wear performance, and friction durability, as well as TES 668™ specification differentiators such as extended anti-shudder durability and extended clutch friction durability. This fluid features an Allison TES 668 approval, and the TES 668™ spec is fully backwards compatible with both Allison TES 295® and TES 468™ applications.
KEY FEATURES
| •Delivers improved gear protection |
| •Delivers extended anti-shudder durability |
| •Delivers extended clutch-friction durability |
| •Excellent corrosion and foaming resistance |
| •Excellent thermal and oxidative stability that helps to prevent deposits and oil thickening |
| •Excellent transmission cleanliness under all conditions permits extended oil-drain intervals and decreased servicing |
| •Excellent temperature reduction through reduced friction leads to longer oil and component life |
| •Outstanding cold-flow properties enable faster oil flow to all critical components, particularly during cold starts |
| •Optimized frictional characteristics give smoother gear changing at all ambient temperatures and load conditions |
| •Excellent shear stability properties help retain full transmission performance over the entire oil-drain interval |
TECHNICAL SPECIFICATIONS
| Appearance | Bright & Clear (Visual) |
| Colour | 6.2 (ASTM D6045) |
| Density @ 15°C, Relative | 0.8508 g/ml (ASTM D4052) |
| Viscosity, Kinematic 100°C | 6.9 mm²/s (ASTM D445) |
| Viscosity, Kinematic 40°C | 33 mm²/s (ASTM D445) |
| Viscosity Index | 168 (DIN ISO 2909) |
| Viscosity, Brookfield @ -40°C (75W) | < 12,000 mPa.s (cP) (ASTM D2983) |
| Flash Point, COC | > 210°C (ASTM D92) |
| Pour Point | -51°C (ASTM D5950) |
PRODUCT PERFORMANCE CLAIMS
| •Allison® TES 668™ |
| •Voith H55.6335.xx |
| •Volvo Transmission Oil 97341:091 |
| •MAN 339 V1 |
| •DTFR 13C190 |
| •DANA-OHTM-ATF-X |
| •Backwards compatible with both Allison TES 295® and TES 468™ |
Data Sheet Date: 11 Jun 2026
The information contained in this data sheet is based on data considered to be accurate. No warranty is expressed or implied regarding the accuracy of this data. Product specifications and availability are subject to change without notice. Lube Control Pty Ltd accepts no responsibility for any loss or damage arising from the use of this information.
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Technical Documents
Castrol TranSynd 668 - TDS
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Product details and specifications are for reference only and subject to change without notice. Customers must independently verify all technical data and OEM approvals directly with the manufacturer prior to purchase. We accept no liability for any errors, omissions, or damages arising from reliance on this information.