Transmission Fluids for Heavy-Duty Trucks
Heavy-duty truck transmissions no longer share one fluid. Automated manual transmissions call for different grades by maker, manual gearboxes keep their own specification, and Allison automatics need an ATF made to their standard. Bedrock Transmission Fluids give each one a synthetic fluid matched to it.
Fleet managers, shop owners and owner-operators who service their own trucks want the right fluid in the right pail, with the specification plain on the label and the data sheet available when they ask. Every Bedrock transmission fluid comes in the 5-gallon pail and is stocked through Bedrock dealers, starting with TTM Diesel in Houston, Texas. Product Data Sheets and Safety Data Sheets are available on request by email.
How to choose
- DT-12 automated manual transmission: use the 75W-90 synthetic AMT fluid.
- Volvo I-Shift or Mack mDRIVE automated manual transmission: use the 75W-80 synthetic transmission fluid.
- Paccar or Eaton automated manual transmission: use the SAE 40 synthetic heavy-duty transmission fluid.
- Transmission that calls for an SAE 50 synthetic transmission fluid: use the SAE 50 synthetic heavy-duty transmission fluid.
- Allison automatic that calls for TES-668: use the full synthetic heavy-duty ATF.
In this family
Bedrock 75W-90 Synthetic AMT Fluid, DT-12
Synthetic 75W-90 transmission fluid for DT-12 automated manual transmissions in heavy-duty trucks
Learn more about Bedrock 75W-90 AMT (DT-12) →Bedrock 75W-80 Synthetic Transmission Fluid (Volvo I-Shift, Mack mDRIVE)
Synthetic 75W-80 transmission fluid for Volvo I-Shift and Mack mDRIVE automated manual transmissions
Learn more about Bedrock 75W-80 I-Shift/mDRIVE →Bedrock SAE 40 Synthetic Heavy-Duty Transmission Fluid (Paccar, Eaton automated)
Synthetic SAE 40 heavy-duty transmission fluid for Paccar and Eaton automated manual transmissions
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 →Bedrock Full Synthetic Heavy-Duty ATF, Allison TES-668
Full synthetic heavy-duty automatic transmission fluid for Allison transmissions that call for TES-668
Learn more about Bedrock ATF TES-668 →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.
What it does on the job
Lubricates the gear train
Gears, shafts and bearings in automated manual and manual gearboxes.
Carries heat out of the transmission
On long pulls, on grades and in stop-and-go city work.
Keeps shifts consistent
A fluid matched to the transmission controller or the Allison valve body.
Protects between services
Resists oxidation and guards against wear, rust and corrosion.
The drive axles behind these transmissions take Bedrock Gear Oils, from 75W-90 to 85W-140. Gear Oils →
Other Bedrock families
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.
More from Bedrock
Find a dealer
TTM Diesel in Houston stocks the line; more dealers are being added.
Read more →
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.
Read more →Bedrock 15W-40 Synthetic Blend Heavy-Duty Engine Oil
SAE 15W-40 synthetic blend diesel engine oil for on-highway trucks, diesel pickups and off-road equipment
Read more →