transmission oil

[enginespirit]

Can anyone tell me what the diffirence is between transmision oil GL-4 and GL-5 ?
Thank you in advance !

 

[Texasmark]

Google the question.

 

[boomer1025]

Gl 4 oil is safe for brass parts.
GL 5 oil will corrode or eat brass parts.

 

[enginespirit]

thank you boomer1025 !!

 

[Z71]

API GL-4 Spiral-bevel and hypoid gears in automotive axles, moderate speeds and loads These oils may be used in selected manual transmission and transaxle applications.


API GL-5 Gears, particularly hypoids in automotive axles high-speed and/or low-speed, high-torque conditions Lubricants qualified under U.S. Military specification MIL-L-2105D (formerly MIL-L-2105C), MIL-PRF-2105E and SAE J2360 satisfy the requirements of the API GL-5 service designation.