# Trans Fluid Compatability

**URL:** <https://community.cartalk.com/t/trans-fluid-compatability/124673>\
**Category:** Maintenance/Repairs\
**Tags:** buick, century\
**Created:** [September 10, 2018, 1:44am UTC](https://community.cartalk.com/t/trans-fluid-compatability/124673 "2018-09-10T01:44:29Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jmcarc](https://avatars.discourse-cdn.com/v4/letter/j/278dde/32.png) [@jmcarc](https://community.cartalk.com/u/jmcarc)\
**Post date:** [September 10, 2018, 1:44am UTC](https://community.cartalk.com/t/trans-fluid-compatability/124673/1 "2018-09-10T01:44:29Z")

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I bought a quart of transmission fluid that’s a full synthetic composition. I would like to know if it’s compatible with the non-synthetic fluid already in the transmission. Will I have problems if I mix the two types?

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**Author:** ![NYBo](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nybo/32/17281_2.png) [@NYBo](https://community.cartalk.com/u/NYBo)\
**Post date:** [September 10, 2018, 1:46am UTC](https://community.cartalk.com/t/trans-fluid-compatability/124673/2 "2018-09-10T01:46:35Z")

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As long as it meets the GM specs for your car, no problem.

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**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\
**Post date:** [September 10, 2018, 1:47am UTC](https://community.cartalk.com/t/trans-fluid-compatability/124673/3 "2018-09-10T01:47:13Z")

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Always use the transmission fluid recommended by the vehicle manufacturer.

Tester