What oil do I use in my rear differential?
There are two types of differential fluid. One is mineral oil, which is a natural, crude oil-based fluid. The other is synthetic differential fluid, which is created in a lab. As with all synthetic oils, synthetic differential fluid oils can be fine-tuned for optimal performance.
What weight gear oil goes in the rear end?
Because many of today’s commercially available synthetics are not engineered with the 9-inch’s requirements in mind, Currie advises using only conventional 85W-140 non-synthetic GL-6 rated gear oil in all front and rearend applications.
What gear oil should I use in my differential?
Most differential gear oils require a grade of SAE 75w90. In comparison, some heavy-duty semi trucks may require SAE 90, 80w-90, and 75w140. Refer to the vehicle’s manual to which type of oil and grade is appropriate for your semi trucks.
What type of gear oil does a Ford 8.8 take?
Ford’s recommendation for diff oil is 80W90 conventional for the front diff and 75W140 for the rear diff (with Ford friction modifier if rear LS).
Is axle oil and gear oil the same?
Well, yes, they are all gear lubricants, but no, you can’t just use them interchangeably. Axles, differentials, final drives and other gear sets used in mobile equipment applications all require specific lubricants designed for the heavy loads and the sliding and rolling forces associated with the operation of gears.
Why does diff oil smell?
The bad smell is an indication that the gearbox is overheating because the lubricating oil is either finished or dirty and cannot oil the gears properly. The oil can also be expired or too old to lubricate any vehicle parts, causing the same bad smell because the metals will be burning due to metal-to-metal friction.
Is synthetic gear oil better than regular gear oil?
Synthetic lubricants have a lower friction coefficient in a gearbox, better film strength and a better relationship between viscosity and temperature (viscosity index, VI). This indicates synthetic lubricants can be used at lower viscosity grades and lower temperatures.
What is gl6 gear oil?
The designation API GL-6 denotes lubricants intended for gears designed with a very high pinion offset. Such designs typically require protection from gear scoring in excess of that provided by API GL-5 gear oils.
What oil goes in a limited slip differential?
Description. Synthetic 75W-90 Limited Slip Gear Oil utilizes the same synthetic oil technology as Driven’s 75W-140 Limited Slip Gear Oil to provide consistent limited slip differential performance.
What oil goes in a Ford 8.8 rear end?
The 8.8 rear end of the Ford Mustang will require approximately 2 to 2.5 quarts of gear oil for the differential. The recommended viscosity for the rear end iS75W-90 synthetic gear lube.
How many quarts does a 8.8 rear end take?
Registered. In the Hot Rod manual, the 8.8 capacity is listed as 1.875 Qts then 4 ounces of friction modifies.
What kind of oil do you put in a Ford Mustang?
Get the all in one kit from Late Model Restoration which includes two bottles of Royal Purple max-gear oil and one bottle of Ford Performance friction modifier. The perfect amount to get your rear end filled back up while virtually eliminating gear and bearing wear, reducing temperatures, and giving your Mustang a smoother operating differential.
When to use gear oil&friction modifier on a Mustang?
Any differential work is going to require you to refill it with Mustang gear oil & friction modifier. Gear installs, axle swaps, traction-lok rebuilds, differential rebuild, and any other projects that require you to remove the differential cover are going to require more gear oil and friction modifier.
Why do I need to service the rear of my Mustang?
The perfect amount to get your rear end filled back up while virtually eliminating gear and bearing wear, reducing temperatures, and giving your Mustang a smoother operating differential.
Do I need more gear oil after installing gear?
Gear installs, axle swaps, traction-lok rebuilds, differential rebuild, and any other projects that require you to remove the differential cover are going to require more gear oil and friction modifier.