What weight diff oil should I use?

The diff oils have a significant impact on your car’s performance. The basic set up we recommend is 5000 cSt in the front, 5000 cSt in the center and 3000 cSt in the rear. With this setup, you’ll achieve neutral behavior while cornering and during acceleration when exiting corners.

Is RC diff oil the same as shock oil?

Yes, shock oil and diff oil are generally the same thing, only different viscosity (both silicone based liquids). Depending on the vendor, the units used are completely different.

How much gear oil goes in a differential?

Use the highest-quality gear oil you can afford to fill the differential. The weight and capacity will be listed in your owner’s manual; your differential will usually hold as much as 3 quarts.

What kind of oil goes in a differential?

Differential oil, sometimes referred to as gear oil, is found in the axle housing. It’s thicker than engine oil and is designed to perform under high pressure (gears mashing together, hydraulic nature of clutch packs) rather than high temperatures like engine oil.

What is the best differential gear oil?

AMSOIL SEVERE GEAR® Gear Lubes are formulated with increased levels of premium quality additives, allowing improved limited-slip and locking differential performance. AMSOIL SEVERE GEAR® Synthetic SAE 75W-110 EP Gear Lube provides superior performance and replaces competitors’ 75W-110, 75W-90 and 80W-90 gear oils.

Is 80W-90 the same as SAE 90?

Yes it is the same… close enough anyway. SAE 90 gear oil is equivalent to 50wt engine oil (SAE 80 = 30wt), so you could always dump that in instead if you want.

Can I use 75W90 instead of 80w90?

If you have differential whine that is quieted by a thicker fluid, then 80W-90 might be a good option. It will certainly be thicker than 75W-90 for most owners’ operating conditions in moderate climates. You could also try 75W-110 for a thicker oil that performs better in the winter.

Is Thicker gear oil better?

As a general rule high viscosity oils are best for low speed, loaded gears with a rough surface. Higher viscosity provides a thicker film, higher wear resistance, and less deformation of the gears as time goes on. Low viscosity oils, on the other hand, are best for high speed systems with lower load.

Can I use SAE 90 instead of 75W90?

Yes. 75w-90 should be just fine.

Can I use engine oil as gear oil?

Home / Technical infos / F.A.Q / Can I use engine oil for the gearbox? No, the majority of gearboxes require a special formulated lubricant for the transmission system. whose crankcase is common between the engine and the transmissions. Like engine oil, the gear oil must comply with the manufacturer’s requirements.

What is 80w90 gear oil used for?

The oil known as 80W-90 GL-5 is a lubricant for the gears in your vehicle. It is used in automatic and manual transmissions, and assists the gears in shifting smoothly.

Can I use 80W90 instead of SAE 80?

It just thins less than a straight 80w would, ending up as thick as a 90w would be when warm. Unless there’s some unusual reason your ATV must have straight weight, 70w-80 would be the way to go. Then it will be the proper viscosity when warm. Since it’s a hypoid gear application be sure that you use a hypoid gear oil.

What gear oil is the thickest?

The SAE grading system indicates oil viscosity in simple numbers ranging from the thin oil (10) to the very thick oil (140 or above). Heavier weight, or higher grade oil is more viscous and therefore thicker as it flows between the gears. Light grade oil is ideal for small, fast, polished gears under a light load.

What is the difference between 80W90 and 85W140 gear oil?

The viscosity chart rates the 80W90 up to 95 degrees while the 85W140 is rated up to 120 degrees.

Can you use GL-5 gear oil instead of GL4?

So if GL5 is used instead of GL4, you’re using a gear lube the American Petroleum Institute says is better, and the Society of Automotive Engineers agree with. GL5 replaces GL4. Failure of manual transmissions is seldom lubricant related.

Is 85w140 thicker than 80w90?

80w-90 front, 75w-140 rear. Rear gets more of a workout so more heat. This equates to thicker lubricant.

Can you mix GL4 and GL5?

Note that the transmission lube is a GL4 while the differential lube is a GL5. You can use GL5 in the transmission, of course, but it is not necessary; the GL5 has Extreme Pressure additives, needed for the sliding action of the hypoid gears in the differential.

Does GL5 replace GL4?

No, the API GL5 rating does not supercede or cover the GL4 rating. It is important to follow the gearbox or diff manufacturers recommendations and use the correct GL rating.

What does GL-5 oil mean?

A GL-5 grade oil has a very high rating for EP (Extreme Pressure) protection. EP gear oils contain additives that prevent metal surfaces from cold welding under the extreme pressure conditions found in situations where boundary lubrication prevails.

What does API GL-5 mean?

The designation API GL-5 denotes lubricants intended for gears, particularly hypoid gears, in axles operating under various combinations of high-speed/shock load and low-speed/high-torque conditions. The performance specifications for API GL-5 are defined in the most recent version of ASTM D7450.

Is synthetic gear oil better?

Synthetic lubricants as a class don’t show their age, particularly at high temperatures, and have a longer service life. Synthetic lubricants have a lower friction coefficient in a gearbox, better film strength and a better relationship between viscosity and temperature (viscosity index, VI).

What does GL-4 mean in gear oil?

API Category GL-4 designates the type of service characteristic of spiral-bevel and hypoid gears in automotive axles operated under moderate speeds and loads. These oils may be used in selected manual transmission and transaxle applications.

Can I use 75w85 instead of 75w90?

Our answer: Yes, 75W-85 gear oil can most definitely be replaced by 75W-90.

Can I use 75w140 instead of 75W85?

New Member. If you tow a lot, the 75w-140 is what you would use. For towing only once in a while go with the 75w-90.

What is hypoid gear oil?

They are basically spiral bevel gears, where the pinion engages below the centerline of the ring gear. This lowers the driveshaft away from the bottom of the vehicle. Hypoid gear oil is formulated with extreme-pressure (EP) additives to protect and operate effectively with hypoid gears.

What does 75W85 mean?

SAE class

Is 75W90 better than 80w90?

SAE 75W-90 maintains a more consistent thickness, or viscosity, across a wide temperature range. It’s thicker when exposed to high heat and thinner under colder, wintry conditions than 80W-90. The use of 75W-90 gear oil is recognized by OEMs as a contributor to overall fuel economy.

What is the difference between 75 80 and 75 90 oil?

Technical Supremo, Platinum Member. Doubt if it’s the oil, basicly the low number is how thick the oil is when cold and the high number when hot, so the 75/90 stays slightly thicker than the 75/80 when hot, but is the same when cold.

What is the best 75W90 gear oil?

7 Best 75W90 Gear Oil [Top Picks & Reviews 2021]

Mobil 1 75W-90 Synthetic Gear Lube.
Red Line MT-90 75W-90 Manual Transmission Gear Oil.
Lucas Oil 10047 Synthetic Transmission and Differential Lube.
Valvoline SynPower SAE 75W-90 Full Synthetic Gear Oil.
Amsoil Full Synthetic Severe Gear Lube.
Royal Purple 01300 Max Gear 75W-90 Synthetic gear oil.

What weight diff oil should I use?

Is 75w90 better than 80W90?

Can you use 75W 140 instead of 80W90?

Either one is fine. Generally the synthetic 75w-140 is for HD applications such as towing, but it will work fine in any application.

What do the numbers on gear oil mean?

Monograde gear oils are designated by one number (70, 90, 140, 250, etc.). The number indicates a level of the oil viscosity at a particular temperature. The higher the grade number, the higher the oil viscosity. Viscosity of gear oils designated with a number only without the letter “W” (SAE 80, SAE 90, SAE 140 etc.)

What is 80W90 gear oil used for?

The oil known as 80W-90 GL-5 is a lubricant for the gears in your vehicle. It is used in automatic and manual transmissions, and assists the gears in shifting smoothly.

What does 80W 140 mean?

The 80W90 and 80W140 are high performance SEMI-SYNTHETIC GEAR OILS with ANTI- FRICTION TREATMENT. They provide superior lubricity which means less wear caused by friction and improved gear protection at extreme temperatures.

What does SAE 140 mean?

The number “140” refers to the kinematic viscosity of the gear oil at 100 °C. This is within a range of 24.0 – 32.4 mm²/s. The higher the number, the more viscous the oil is. SAE 140 class gear oil is considered to be one of the thickest oils used in passenger cars.