While there were pockets where the east and west came together, and had some overlap, over the course of the war, the answer is basically no. The Soviets refused to disclose anything at a tactical level, or provide information about their forces to the western allies. The entire major thrust of the western d-day theater - the invasion of France - was designed to remove pressure from the Soviet Union.

The only place where real assistance could have happened was in the last days, and rightly or wrongly, Eisenhower chose not to go into Berlin, and paused his forces at the Elbe River, ensuring that the armies (on the whole) where not in contact until hostilities had ceased.

In the pacific theater, the Soviets also did not materially help. They interned any american planes or soldiers who landed in their territory. After Germany was knocked out of the war, the Soviets planned their own indepdent invasion of Japan, but did not inform the Americans or the British of this. Stalin desperately pushed his forces into the pacific theaters as quickly as possible to attempt to claim as much of asia as possible, but the atomic bomb limited his ambitions to occupational zones in Korea, Sakhalin and the Kuril Islands, setting the stage for the next war.