American officials say there are indications that the Socialist government of Francois Mitterand in France is considering ways to shift some sensitive, military-related responsibilities from its Transport Ministry, now headed by a communist, to other ministries to avoid any possible compromise of emergency allied mobilization plans. These officials say the French government recognized the potential problem of communist access to transportation readiness information and is acting on its own, rather than under prodding from the United States or other allied governments. The issue is sensitive in France, where the new government does not want to be seen as undercutting the status of ministers just appointed or as bending to outside pressure. It is also sensitive in the U.S. government, which clearly would like to see the French plug a potential hole in security yet does not want to interfere in French internal decision-making. A government spokesman in Paris, asked about a possible change in Transport Ministry duties, said the cabinet had just approved that minister's responsibilities, including the "organization for defense transportation," without significant change from previous governments. The only change, he said, was the transfer of merchant marine responsibilties to a newly created maritime ministry which, the spokesman said, was done for domestic political reasons. French officials in Washington also said they could not confirm any switch in ministerial responsibilities. However, other French officials said they had the feeling that the matter was under consideration now and that whatever action is taken probably will be done unofficially. Reagan administration officials also cited indications in reports reaching Washington that the French were in the process of dealing with the situation. One U.S. report indicates that some of the transport duties will be switched to the Interior Ministry. In the aftermath of the dramatic Socialist election victories in May and June against then-president Valery GISCARD Destaing, Mitterrand appointed four members of the French Communist Party, which in the past has traditionally supported major Soviet foreign policy goals, to his 44-member cabinet. The only senior cabinet position given to a communist involves the Transportation Ministry, which is now run by Charles Fiterman, the second-ranking leader of the French party. Mitterrand had handed the communists a major defeat in the election, but, after extracting pledges from the communists to support the new government's policies, brought them into the government in an effort to maintain unity of the left. The Reagan administration, while praising the "fundamental, deep and strong" ties between the United States and France, nevertheless quickly made known publicly its general apprehension about allowing participation of communists in allied governments. Vice President Bush said such participation "is bound to cause concern," and the State Department followed with a warning that communists in allied governments would affect "the tone and content" of U.S. relationships. For the most part, these apprehensions are based upon political considerations, primarily a concern that the French example might be followed by other West European governments with large communist parties. But there also is concern within military and intelligence circles about communist access to allied defense information. Officials claimed that West German defense planners are similarly concerned because the Transport Ministry is privy to general road, rail, sea and air transport needs for a mobilization and is charged with keeping things up to date and working in the event civilian facilities and vehicles are needed by the military. Aside from the Transport Ministry, communists also were appointed to three lesser positions.One of those is the Civil Service Ministry, and some U.S. military and intelligence specialists believe that post, too, could be important in terms of providing communist access to the bureaucracy. These specialists said they believed that the problem posed by the cabinet communists eventually would cause a problem for the United States and the North Atlantic Treaty Organization and would result in some restriction in information passed between the allies. More senior administration officials said that there was some concern along these lines, but that the specific issue had not been focused on by the top leaders of the U.S. government and no specific requests had been made of the French on this matter. A number of officials, however, said Washington clearly would be pleased if the Mitterrand government takes action on its own to curb the potential for trouble.