4 x 400 m Relay, Women
| Competition | 1977 South American Athletics U18 Championships |
|---|---|
| Venue |
Rio de Janeiro
 BRA
|
| Held | — |
| Status | Medal |
| Competitors | 12 |
| Countries | 3 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | Brazil | BRA |
3:50.6 | ||
| Antonia Mainart | — | ||||
| Iłża Telles | — | ||||
| Sandra Ferreira | — | ||||
| Sueli Machado | — | ||||
| 🥈 | Argentina |  ARG |
3:52.1 | ||
| Alejandra Vives | — | ||||
| Viviana Brossard | — | ||||
| Silvia Augsburger | — | ||||
| Marcela López | — | ||||
| 🥉 | Chile |  CHI |
3:57.7 | ||
| María Labarca | — | ||||
| Pía Ábalos | — | ||||
| Cecilia Rodríguez | — | ||||
| Mónica Regonesi | — |