Below is a description on the example of AT A5S 310Z.
1. Remove the AT oil pan (see Section Removal and installation of the oil pan).
2. Turn out bolts and remove the mesh oil filter.
3. Remove the cover (1) from the hydraulic control unit АТ.
4. Remove the hydraulic control unit from the AT body.
Remove only head bolts (A) 12 mm.
5. Turn the wiring connector to the left and pull it out.
6. Remove the clamping bracket and push the wiring connector into the AT crankcase.
7. Remove the hydraulic control unit with wiring harness.
8. Installation is carried out in the reverse order. Pay attention to the following points.
9. Make sure that the alignment pins are installed correctly (1). Pin (3) selector lever must engage in the groove of the sliding valve (2).
10. Replace o-rings.