# gl-4 gear oil

**URL:** <https://forums.speedlife.net/t/gl-4-gear-oil/19039>\
**Category:** NYSpeed Automotive\
**Created:** [October 19, 2006, 7:08pm UTC](https://forums.speedlife.net/t/gl-4-gear-oil/19039 "2006-10-19T19:08:32Z")\
**Posts on this page:** 1\
**Showing post:** 12

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**Author:** ![MaximaSE98](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/maximase98/32/7600_2.png) [@MaximaSE98](https://forums.speedlife.net/u/MaximaSE98)\
**Post date:** [October 26, 2006, 6:29am UTC](https://forums.speedlife.net/t/gl-4-gear-oil/19039/12 "2006-10-26T06:29:05Z")

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> [@ecoshardcore](#):
>
> pretty sure MT90 is full synthetic

it is…but its safe for GL4 transmissions and transfercases

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