Re: GL4 or GL5 for Brass Synchronizer This is not a better question, GL5 will damage your gearbox. There are some GL5s on the market that claim to be yellow metal safe, but I don’t believe them. Use GL4. All early isochronous transmissions contained yellow metal.

Is GL5 safe for brass?

This recipe is non-corrosive Brass, copper or other metal alloys for transmissions. Today, this is widely used in automotive transmissions and gear oils. GL-5 grade oils have a very high EP (extreme pressure) protection rating.

Can I use GL5 instead of gl3?

The main difference between GL-4 and GL-5 gear oils is the amount of EP additive. GL-4 is suitable for hypoid gear service under severe conditions but without shock loads. GL-5 is suitable for hypoid gears under severe conditions and shock loads, not for gearboxes.

Is GL5 synthetic?

Bel-Ray® Synthetic GL-5 Gear Oils are designed to provide superior performance for automobiles, light and heavy duty trucks, and a variety of industrial equipment specifying API Service Classification GL-5 and/or MT-1. This product is formulated from synthetic base oils with excellent thermo-oxidative stability.

Are GL-5 gear oils backward compatible?

GL-5 is not necessarily backward compatible Synchronous mesh transmissions designed for GL-4 oil: Due to the higher concentration of EP additives than GL-4, GL-5 has a lower coefficient of friction, so the synchronizer does not engage effectively.

Understanding the Transmission Synchronization Ring

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Can I use 80W90 instead of SAE 80?

Yes, it’s the same…close enough anyway. SAE 90 gear oil is equivalent to 50wt engine oil (SAE 80 = 30wt) so you can always pour it in if you want.

Is 75W90 better than 80W90?

75W90 is synthetic, mostly better than 80W90, but at a higher cost. The low temperature viscosity of 75W90 is better, and the whole process runs well. If you’re in a place that’s not too cold, there’s little advantage to running a 75W90, and in theory, an 80W90 might even be more stable.

What does GL-5 mean?

Name API GL-5 Representation Lubricants for gearsespecially hypoid gears, in axles operating under various combinations of high speed/shock loads and low speed/high torque conditions.

What does API GL-5 mean?

API API Gear Oil Specifications

Friction modifiers and extreme pressure additives must not be used. … name API GL-5 representation Lubricants for gearsespecially hypoid (see note) gears, in axles operating under various combinations of high speed/shock loads and low speed/high torque conditions.

Is the GL4 safe for yellow metal?

answer: GL4 grade oil is safer for yellow metals.

What is GL3 Gear Oil?

GL3 is next level of performance And the application is very limited. Mainly used in French and Italian (Fiat and Alfa) cars with very soft synchromesh. It has very low EP (Extreme Pressure) properties and contains no concentrated additives used in later engines.

What is GL4 Gear Oil?

Sheng brand gear oil GL-4 is A multipurpose gear oil for transmissions and transaxles in passenger cars and vehicles… Valvoline™ gear oils provide excellent protection and lubrication for transmissions in passenger cars, service and other vehicles in a wide range of climatic conditions and temperatures.

Is GL 5 gear oil safe for yellow metal?

You do need to use oil with high pressure additives to help protect 2 of those worm gears. They do not recommend GL5 gear oil Because it is very hard against yellow metal.

Can I use 75W 90 instead of 75w80?

Using the 75W-90 (instead of the 75W-80) will Makes gear meshing and changing clumsyespecially in cold weather.

Can I use 80W90 instead of 75w90?

answer: Yesyou can mix 75w90 with 80w90.

Can I use 80W90 instead of 85W90?

85W90 can only flow at -12 °C, on the other hand, the 80W90 drops to -26 °C. If your vehicle is regularly exposed to very cold temperatures, we recommend 80W90 transmission fluid, otherwise 85W90 can also be added.

Is GL 5 a hypoid?

Gear Oil GL-5 provides value through: Good gear life – extreme pressure characteristics Protect hypoid and other types of gear wear. … extreme pressure additives in gear oil GL-5 provide good gear protection in general gear applications.

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

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Doubt if it’s oil, basically the low number is the consistency of the oil when it’s cold and the high number when it’s hot, so 75/90 is slightly thicker than 75/80 when hotbut also in the cold.

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

The viscosity chart sets the maximum temperature for 80W90 at 95 degrees, while 85W140 rated up to 120 degrees.

Is thicker gear oil better?

Higher viscosity provides thicker films, higher wear resistance and less deformation of gears over time. On the other hand, low-viscosity oils are best suited for high-speed systems with lower loads. They provide thinner films and better cooling to match the higher speeds of the associated gearbox.

Can I use 75W140 instead of 75W90?

Can I use 75w140 instead of 80w90? either one is fine. Typically, the synthetic 75w-140 is used for HD applications like dragging, but will work fine in any application.

Which is thicker, 75W90 and 75W140?

So the difference between « 75W90 » and « 75W140 » is that at operating temperature, 75W140 will be much thicker than 75W90 But at room temperature, they have about the same viscosity.

Is 80W the same as 10W 40?

The most common mistake is to assume that the viscosity of SAE 80W gear oil is much higher than that of SAE 10W-40 oil. This is absolutely incorrect! The viscosity of 10W-40 oil is actually similar to that of 80W gear oilThe viscosity of SAE 10W-30 is similar to that of 75W gear oil.

What is the equivalent of SAE 90 oil?

Since the viscosity of transmission oil and engine oil are measured on different scales, the viscosity of SAE 80 transmission oil is roughly comparable to that of SAE 20 engine oil. The viscosity of SAE 90 transmission fluid is the same as SAE 50 engine oil. Most manufacturers now offer EP80W/90 oil in place of EP80 and EP90.

Is GL5 a hypoid oil?

Hypoid Gear Oil (GL5) SAE 140W is a high performance, high pressure gear oil made from carefully selected base oils and multifunctional extreme pressure additives. This hypoid gear oil is suitable for axle drives, especially for heavy duty hypoid gearboxes.