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Click on image for the lowdown. 
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| | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | Why?
The grade of oil for that transmission is specified by GM. SAE 90 (with SAE 80 being OK in the winter).
Steering gear grease is a muck thicker lubricant than specified by GM for use in that transmission.
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