Bedrock 80W-140
FULL SYNTHETIC
GEAR OIL
Full synthetic SAE 80W-140 gear oil for drive axles that call for a 140 grade
Bedrock 80W-140 Full Synthetic Gear Oil is the heavier of the two full synthetic gear oils in the Bedrock lineup. A 140 grade keeps a thicker oil film between the gear teeth at operating temperature than a 90 grade does, which is why axle makers list it for heavier loads, slower speeds and hotter running. The 80W side of the grade means it still flows at start-up on a cool morning.
That describes a lot of Gulf Coast work: dump trucks and mixers in stop-and-go city traffic, heavy-haul tractors pulling permit loads, and oilfield trucks grinding over lease roads in summer heat. In those axles the oil has to protect the ring and pinion under high tooth loads and keep doing it as the housing temperature climbs. The full synthetic base oil resists thinning and oxidation in that heat.
Use Bedrock 80W-140 where the axle maker's chart lists an 80W-140 or allows a 140 grade for your load and temperature range. For on-highway axles that list a 75W-90, Bedrock 75W-90 Full Synthetic Gear Oil is the lighter companion grade. Where the chart lists 85W-140, Bedrock 85W-140 Gear Oil, the heaviest grade in the gear oil lineup, covers that service.
Sheets are sent by email on request.
Applications
- Drive axles on dump trucks, concrete mixers and roll-off trucks working in city traffic in summer heat.
- Heavy-haul tractors pulling permit loads at low speed, where the gear teeth carry high loads for long periods.
- Oilfield haul trucks, vacuum trucks and winch trucks on unpaved lease roads.
- Tandem drive axles and inter-axle differentials whose maker lists a 140 grade for the fleet's load and climate.
- Axles that run hot because of continuous loaded operation, long pulls on grades or high ambient temperature.
- Fleets that want one full synthetic 140 grade across heavy on-highway and off-highway trucks.
Performance
- Keeps a thick oil film between heavily loaded gear teeth at operating temperature.
- Protects the ring and pinion against scoring and wear under high tooth loads and shock loads.
- Resists thinning and oxidation as axle housing temperature climbs in hot, slow, loaded work.
- Flows at start-up more readily than an 85W grade, so bearings are oiled sooner on a cool morning.
- Controls foam and protects gears, bearings and housings against rust and corrosion.
Specifications
Bedrock 80W-140 Full Synthetic Gear Oil is an SAE 80W-140 gear oil. The specifications it is formulated to meet are listed on the Product Data Sheet, available on request.
Typical properties
Typical properties for Bedrock 80W-140 Full Synthetic Gear Oil are listed on the Product Data Sheet, available on request at [email protected] or [email protected].
Packages and part numbers
| Package | Part number | Case pack | |
|---|---|---|---|
| 5-gallon pail | BED80W1405G | Single |
Bedrock 80W-140 Full Synthetic Gear Oil comes in one package size: 5-gallon pail.
Order by part number from your dealer → Where to Buy
More in Gear Oils
Bedrock 75W-90 Full Synthetic Gear Oil
Full synthetic SAE 75W-90 gear oil for truck drive axles and differentials
Learn more about Bedrock 75W-90 →Bedrock 80W-90 Gear Oil
SAE 80W-90 gear oil for drive axles, differentials and manual gearboxes
Learn more about Bedrock 80W-90 →Bedrock 85W-140 Gear Oil
Heavy SAE 85W-140 gear oil for drive axles and gear cases in warm-weather, heavy-load service
Learn more about Bedrock 85W-140 →Sizes and part numbers
| Product | 5 GAL |
|---|---|
| Bedrock 75W-90 Full Synthetic Gear Oil75W-90 | BED75W905G |
| Bedrock 80W-90 Gear Oil80W-90 | BED80W905G |
| Bedrock 80W-140 Full Synthetic Gear Oil80W-140 | BED80W1405G |
| Bedrock 85W-140 Gear Oil85W-140 | BED85W1405G |
Swipe sideways to see every size →
Order by Bedrock part number from your dealer.
Frequently asked questions
When should I use 80W-140 instead of 75W-90?
When the axle maker's chart lists a 140 grade for your load and temperature range. That usually means heavy loads, low speeds or high ambient heat. Both Bedrock grades are full synthetic; the 80W-140 holds a thicker film at operating temperature and the 75W-90 flows more easily when cold.
What is the difference between 80W-140 and 85W-140?
Both are 140 grades at operating temperature. The 80W flows more easily at start-up than the 85W, so an 80W-140 covers a wider temperature range on the maker's chart. Bedrock 80W-140 is also a full synthetic; a synthetic base is the usual choice where the axle runs hot for long stretches. Use the grade the axle maker's chart lists for your fleet.
Will a heavier gear oil make my axle run cooler?
Not by itself. A heavier grade keeps a thicker film under load, but a thicker oil also churns harder, which adds heat at speed. Axle temperature depends mostly on load, speed, gearing and ambient temperature. Use the grade the axle maker lists for your service, keep the oil at the correct level and check that the breather is clear.
Specifications and typical properties are stated on each product's data sheet; follow the equipment maker's service recommendations.
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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.
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Request a quote
Write to [email protected] with the part numbers and quantities.
Read more →Bedrock 75W-90 Full Synthetic Gear Oil
Full synthetic SAE 75W-90 gear oil for truck drive axles and differentials
Read more →