In the following year she won the Prix de la Grotte by ten lengths and recorded her biggest success when taking the Coronation Stakes at Royal Ascot.
In the same year she finished second in both the Poule d'Essai des Pouliches and the Queen Elizabeth II Challenge Cup Stakes and third in the Prix du Moulin.
She was sired by Caerleon, an American-bred colt who won the Prix du Jockey Club and the Benson and Hedges Gold Cup in 1983 when trained in Ireland by Vincent O'Brien.
Despite her modest form, the filly was then moved up in class to contest the Group Three Prix d'Aumale over 1600 metres on very soft ground at Longchamp Racecourse in September.
On her three-year-old debut, Shake The Yoke met Miss Tahiti yet again in the Prix La Grotte on good to firm ground at Longchamp on 21 April.
In June, Shake The Yoke was sent to England to contest the Group One Coronation Stakes over one mile at Royal Ascot, with Olivier Peslier taking over from Boeuf.
After being restrained in the early stages, STY moved forward approaching the straight, took the lead from Dance Design inside the final furlong and won by a neck from the fast-finishing Last Second.
On her final appearance of the year, the filly was sent to the United States for the Grade I Queen Elizabeth II Challenge Cup Stakes at Keeneland Racecourse on 5 October in which she was partnered by Eddie Delahoussaye and finished second to Memories of Silver.