Which specification does Automatic transmission fluid (ATF) need for the Citroën GSA 1300 (1979–1983)?

Automatic transmission fluid (ATF) for the Citroën GSA 1300 (1979–1983): Allison TES 389, Caterpillar TO-2.

Which specification does Axle & differential oil need for the Citroën GSA 1300 (1979–1983)?

Axle & differential oil for the Citroën GSA 1300 (1979–1983): API GL5, MIL-L 2105 D.

Suitable for Citroën GSA 1300 (1979–1983)

For the Citroën GSA 1300 (1979–1983), the manufacturer specifies motor oil 10W-30 (ACEA A3, ACEA B4, API SF), 15W-40 (ACEA A2, ACEA A3, ACEA A3/B4), or 20W-50 (ACEA A3, ACEA A3/B4, ACEA B4).

Fluids and approvals for the Citroën GSA 1300 (1979–1983)

Fluid	Requirement
Motor oil	10W-30: ACEA A3, ACEA B4, API SF15W-40: ACEA A2, ACEA A3, ACEA A3/B420W-50: ACEA A3, ACEA A3/B4, ACEA B4
Automatic transmission fluid (ATF)	Allison TES 389, Caterpillar TO-2
Axle & differential oil	API GL5, MIL-L 2105 D