SHP® 668 ATF
ALLISON TES- 668 APPROVED PREMIUM SYNTHETIC, HEAVY-DUTY, AUTOMATIC TRANSMISSION FLUID
Kendall® SHP 668 ATF is a full-synthetic, heavy duty automatic transmission fluid designed for use in truck and bus transmissions that operate under severe service conditions or in extended drain intervals. SHP 668 ATF is for use where OEM specifies an Allison TES-668 transmission fluid.
With excellent shear stability and high load-carrying ability, SHP 668 ATF protects against viscosity breakdown, resists oxidation, and maintains thermal stability to minimize the formation of sludge and varnish. With exceptional friction durability, SHP 668 ATF ensures smooth shifting and proper transmission performance. This fluid has properties to perform well in low temperature environments, ensuring year-round use and protection against rust and corrosion.

Links of Interest
Features & Benefits
- Excellent friction durability for smooth shifting throughout the service interval
- Outstanding oxidation resistance and thermal stability for long fluid life
- Protects against sludge and varnish formation
- Protects against wear
- High shear stability maintains fluid integrity across the service interval
- Protects against rust and corrosion
- Outstanding low-temperature properties for easier shifting in cold weather
- Good seal compatibility and foam resistance
- Back-serviceable to Allison TES-295 applications and earlier
Applications
- Heavy-duty automatic transmissions in trucks and buses in extended drain or severe service, such as in intracity transit buses, intercity tour coaches, school buses, emergency vehicles, recreational vehicles, refuse vehicles and commercial utility vehicles
Technical Details
Licenses & Approvals:
SHP 668 ATF is OEM-approved for service fill in:- Allison automatic transmissions where a TES-668 approved fluid is specified (Approval No. 668-10192021)
Additional Details:
Specific Gravity @ 60°F | 0.85 |
Density, lbs/gal @ 60°F | 7.10 |
Color, Visual | Red |
Flash Point (COC), °C (°F) | 210 (410) |
Pour Point, °C (°F) | -51 (-60) |
Viscosity, Brookfield | |
cP @ -40°C | 11,160 |
Viscosity, Kinematic | |
cSt @ 40°C | 33.7 |
cSt @ 100°C | 6.9 |
Viscosity Index | 171 |
Zinc, wt % | <0.0001 |