Manual Trans & Diff oil (Full Version)

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Manual Trans & Diff oil

  

hamcginn -> Manual Trans & Diff oil (1/25/2008 1:35:01 PM)

07 Colorado.  The owners manual calls for 75W90 synthetic in the diff, 89021-806 (manual trans fluid) in the trans. Am pretty sure the trans fluid is not synthetic.  What about using synthetic oil in the trans.

  
EuroGoldLS -> RE: Manual Trans & Diff oil (1/30/2008 5:21:27 PM)

Most transmission fluid is synthetic now. If it was natural refined oil, it would lose its viscosity over time and not protect as well. Theres also nothing in the Colorado transmission that can really be damaged by using synthetic fluid anyway. I say use it. It shouldn't make much difference either way.

hamcginn -> RE: Manual Trans & Diff oil (2/5/2008 2:57:20 PM)

Thanks for your thoughts.  My main concern is the synchronizers not being able to grab.

  

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