Difference between revisions of "Transmission oil"
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[[Category:Oil and other fluids]] | [[Category:Oil and other fluids]] | ||
| − | == | + | == API Classes == |
| + | Transmission oil (or gear oil) is classified according to the API (American Petroleum Institute) in GL and MT ratings. | ||
| + | |||
| + | * '''GL-1''' - Deprecated: Used for mild conditions and low unit pressures. Contains oxidation and rust inhibitors, defoamers and pour depressants. | ||
| + | * '''GL-2''' - Deprecated: Used for worm-gear-axles and for conditions of load, sliding and temperatures where GL-1 wouldn't suffocate. | ||
| + | * '''GL-3''' - Deprecated: Used for spiral-bevel-axles in mild to moderate conditions. | ||
| + | * '''GL-4''' - Used for spiral-bevel and hypoid gears with moderate speeds and loads. | ||
| + | * '''GL-5''' - Used for spiral-bevel and hypoid gears with high speed and high torque. | ||
| + | * '''GL-6''' - Obsolete: Designed for very high pinion offset. | ||
| + | * '''GMT-1''' - Used for non-synchronized manual transmission like buses and heavy-duty trucks. Exceeds the protection requirements of GL-4 and GL-5. | ||
== OEM Specifications == | == OEM Specifications == | ||
| Line 9: | Line 18: | ||
== 2nd Gear grinding == | == 2nd Gear grinding == | ||
| − | + | See: [[Second gear grinding]] | |
| − | See: [[ | ||
== Recommendations == | == Recommendations == | ||
| + | Generally speaking you want: | ||
| + | * Meet or exceed the OEM specification | ||
| + | * The highest possible flashing point | ||
| + | * The lowest possible pour point | ||
| − | === Castrol Syntrans FE 75W | + | === Castrol Syntrans FE 75W === |
| − | This oil has fixed the 2nd gear grinding problem for several people. It also meets all the required OEM | + | This oil has fixed the 2nd gear grinding problem for several people. It also meets all the required OEM criteria. |
{| class="wikitable" style="text-align:center;" | {| class="wikitable" style="text-align:center;" | ||
| Line 30: | Line 42: | ||
| '''Viscosity index (DIN ISO 2909)''' || 154 | | '''Viscosity index (DIN ISO 2909)''' || 154 | ||
|- | |- | ||
| − | | '''API''' || GL 4 | + | | '''API''' || GL-4 |
|} | |} | ||
Latest revision as of 08:30, 3 December 2019
Contents
API Classes[edit]
Transmission oil (or gear oil) is classified according to the API (American Petroleum Institute) in GL and MT ratings.
- GL-1 - Deprecated: Used for mild conditions and low unit pressures. Contains oxidation and rust inhibitors, defoamers and pour depressants.
- GL-2 - Deprecated: Used for worm-gear-axles and for conditions of load, sliding and temperatures where GL-1 wouldn't suffocate.
- GL-3 - Deprecated: Used for spiral-bevel-axles in mild to moderate conditions.
- GL-4 - Used for spiral-bevel and hypoid gears with moderate speeds and loads.
- GL-5 - Used for spiral-bevel and hypoid gears with high speed and high torque.
- GL-6 - Obsolete: Designed for very high pinion offset.
- GMT-1 - Used for non-synchronized manual transmission like buses and heavy-duty trucks. Exceeds the protection requirements of GL-4 and GL-5.
OEM Specifications[edit]
Honda states that you should use Honda MTF which is specified as:
- 75W-80 viscosity
- Meets GL-4 Spec
2nd Gear grinding[edit]
See: Second gear grinding
Recommendations[edit]
Generally speaking you want:
- Meet or exceed the OEM specification
- The highest possible flashing point
- The lowest possible pour point
Castrol Syntrans FE 75W[edit]
This oil has fixed the 2nd gear grinding problem for several people. It also meets all the required OEM criteria.
| Flash Point, ºC (ASTM D92) | 226 |
| Pourpoint, ºC (ASTM D97) | -51 |
| Density, @15ºC, g/ml (ASTM D4052) | 0,852 |
| Viscosity, @40ºC, (ASTM D445) | 32,2 |
| Viscosity, @100ºC, (ASTM D445) | 6,3 |
| Viscosity index (DIN ISO 2909) | 154 |
| API | GL-4 |
