Bedrock
FULL SYNTHETIC HEAVY-DUTY
ATF, ALLISON TES-668
Full synthetic heavy-duty automatic transmission fluid for Allison transmissions that call for TES-668
Bedrock Full Synthetic Heavy-Duty ATF is an automatic transmission fluid for Allison transmissions that call for TES-668. Allison automatics work the trucks that stop and start all day: refuse trucks, dump trucks and mixers, school and transit buses, fire apparatus, utility trucks and delivery vans. In these transmissions the fluid does more than lubricate. It transmits power through the torque converter, applies the clutches, carries heat to the cooler and helps keep the valve body clean so shifts stay consistent.
A full synthetic ATF holds up in the heat an automatic builds in stop-and-go work and on long grades with a loaded body. It resists oxidation, so the fluid stays clean and keeps its friction properties between services. It flows at start-up for prompt, firm engagement and protects gears, bearings, bushings and clutch plates against wear.
This is the only automatic transmission fluid in the Bedrock line, and it rounds out a transmission family that otherwise covers automated manual and manual gearboxes. A vocational truck with an Allison automatic usually also needs Bedrock 15W-40 for the engine, Bedrock red 50/50 antifreeze / coolant for the cooling system, a Bedrock anti-wear hydraulic oil for the body hydraulics and Bedrock EP grease for the chassis. The ATF comes in the 5-gallon pail.
Sheets are sent by email on request.
Applications
- Refuse trucks with Allison automatics on stop-and-start collection routes
- Dump trucks, mixers and other vocational chassis with Allison transmissions that call for TES-668
- School and transit buses, shuttle buses and motor coaches with Allison automatics
- Fire apparatus, ambulances and utility trucks that idle long and move short distances
- Delivery trucks and step vans working city routes all day
- Oilfield and construction service trucks with Allison automatics in Gulf Coast heat
- Fleet shops that service Allison transmissions on a schedule
Performance
- Transmits power through the torque converter and applies the clutches smoothly
- Keeps its friction properties between services so shifts stay consistent
- Resists oxidation and stays clean in the heat of stop-and-go work
- Protects gears, bearings, bushings and clutch plates against wear
- Flows at start-up for prompt, firm engagement
- Carries heat to the transmission cooler on long grades and in traffic
Specifications
Bedrock Full Synthetic Heavy-Duty ATF is a full synthetic automatic transmission fluid formulated for use where Allison TES-668 is specified. The specifications it is formulated for are listed on the Product Data Sheet, available on request.
Typical properties
Typical properties for Bedrock Full Synthetic Heavy-Duty ATF are listed on the Product Data Sheet (PDS), available on request.
Packages and part numbers
| Package | Part number | Case pack | |
|---|---|---|---|
| 5-gallon pail | BEDUATF5G | Single |
Bedrock Full Synthetic Heavy-Duty ATF comes in one package: the 5-gallon pail.
Order by part number from your dealer → Where to Buy
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Learn more about Bedrock SAE 40 Paccar / Eaton →Bedrock SAE 50 Synthetic Heavy-Duty Transmission Fluid
Synthetic SAE 50 heavy-duty transmission fluid for truck transmissions that call for an SAE 50 synthetic fluid
Learn more about Bedrock SAE 50 →Sizes and part numbers
| Product | 5 GAL |
|---|---|
| Bedrock 75W-90 Synthetic AMT Fluid, DT-1275W-90 AMT (DT-12) | BED75W90AMT5G |
| Bedrock 75W-80 Synthetic Transmission Fluid (Volvo I-Shift, Mack mDRIVE)75W-80 I-Shift/mDRIVE | BED75W805G |
| Bedrock SAE 40 Synthetic Heavy-Duty Transmission Fluid (Paccar, Eaton automated)SAE 40 Paccar / Eaton | BEDSAE405G |
| Bedrock SAE 50 Synthetic Heavy-Duty Transmission FluidSAE 50 | BEDCD505G |
| Bedrock Full Synthetic Heavy-Duty ATF, Allison TES-668ATF TES-668 | BEDUATF5G |
Swipe sideways to see every size →
Order by Bedrock part number from your dealer.
Frequently asked questions
Is this fluid for Allison transmissions that specify TES-668?
Yes. Bedrock Full Synthetic Heavy-Duty ATF is formulated for use where Allison TES-668 is specified. The specifications it is formulated for are listed on the Product Data Sheet, available on request from [email protected]; check the sheet against the Allison service literature for your transmission model.
My older Allison calls for an earlier specification. Can I use this fluid?
Follow the Allison service literature for your transmission model. It states which fluid specifications apply to your unit and whether a TES-668 fluid may be used in place of an earlier one. If you need help reading it, email [email protected] with the transmission model and serial number.
Can I top off with a different ATF if I run short?
Keep the fluid in the transmission consistent. Mixing fluids of different specifications can change friction behavior and shift quality, and it makes the fluid's condition harder to judge at the next service. Carry a spare pail of Bedrock Full Synthetic Heavy-Duty ATF, or ask your dealer for the nearest stock.
Specifications and typical properties are stated on each product's data sheet; follow the equipment maker's service recommendations.
Equipment and specification names belong to their owners and identify the equipment the product is formulated for; they do not imply endorsement.
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Find a dealer
TTM Diesel in Houston stocks the line; more dealers are being added.
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Data sheets
A PDS and an SDS for every product, sent by email on request.
Read more →
Request a quote
Write to [email protected] with the part numbers and quantities.
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