The answer to this depends on which sets of allies you are asking about. Some of the Allied Powers had good relations with one another while others did not.
In general, the relationship between the United States and the United Kingdom were very close and very good. The two countries had cooperated closely during the war and were on very good terms. These two countries and France were also on decent terms. The French, under de Gaulle, did have some agreements with the English-speaking countries. The French wanted to treat Germany more harshly. They also were very concerned that they should get full credit as allies even though they had not participated as fully in the war.
These three got along well enough, though, that they ran their occupation zones of Germany jointly and generally had only minor disagreements. However, relations between the English-speaking countries and the Soviet Union were quite bad. Essentially as soon as WWII ended, the Cold War began. The Cold War stemmed from the serious distrust and ideological differences between the Western Allies and the Soviets.