Automatic Transmission Case

WARNING: This page is about a different car, the 2020 Buick Regal and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Automatic Transmission Case Ball Check Valve Locations

Courtesy of GENERAL MOTORS COMPANY

I.D.	Input Oil	Input Oil	Output Oil
1	38 CL	-	38 CL
2	57 Rev CL	-	57 Rev CL
3	6789 CL	-	6789 CL
4	1 Rev Limit	-	1 Rev Release
5	1 Rev Feed	-	1 Rev Apply