4 x 400 m Relay, Women
| Competition | 1978 South American Athletics U20 Championships |
|---|---|
| Venue |
Sao Paulo
 BRA
|
| Held | — |
| Status | Medal |
| Competitors | 12 |
| Countries | 3 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | Argentina |  ARG |
3:47.3 | ||
| Elba Labatte | — | ||||
| Anabella Dal Lago | — | ||||
| Silvia Augsburger | — | ||||
| Marcela López | — | ||||
| 🥈 | Chile |  CHI |
3:47.8 | ||
| Carla Herencia | — | ||||
| María Fernández | — | ||||
| Cecilia Rodríguez | — | ||||
| María Labarca | — | ||||
| 🥉 | Brazil | BRA |
3:56.8 | ||
| Célia Da Costa e Silva | — | ||||
| Elizabeth Montesano | — | ||||
| Cláudia Adolfo | — | ||||
| Maria José Ferreira dos Santos | — |