The Engineering Department had been working on a new model during these depressed years, and it was shown in late 1935 as the Series ''Y''. It was an attractive vehicle with sloping front and rear windshields. The hood treatment was similar to the 1935 Ford V8. The new cars sold well. During the first quarter, 980 were built. One thousand two hundred and fifty were projected for the second quarter, and a new long wheelbase vehicle, which could be called the grand daddy of the Aerobus, was developed. They were built initially for the Parmelee Company and could be purchased in six and eight door models. They were used extensively for transportation between depots, airports and hotels. Production was booming again and men were being called back to work. Business improved in 1936 and into 1937. Between January and March 1936, Mr. Markin was able to regain control of the company. If he had not done so at the time, Checker would be but a memory. In August of 1937, E. L. Cord decided to retire and put all his holdings up for sale. By the end of 1937, Stutz, Marmon, Pierce-Arrow, Peerless and many other of the finest names in automobiles were gone by the wayside. At Checker, the Model ''Y'' stayed on as the mainstay of production, and the company diversified a bit. In 1938 and 1939 they built bodies for Hudson Motor Car. They also built a few large trucks and buses. Cab production was low but steady. Then in 1939 a new project came about.

A new Series ''A'' was started. It was a very critical one as it actually was to carry the company into the final design used. The Series "A" came out in 1940 and continued through World War II. The car had many new safety features and was one of the roomiest Checkers ever built.

When Checker wasn't building cabs during this period of time, they were building trailers for Sears-Roebuck, truck cabs for Ford and an Army jeep. There were only four jeeps made, all to government specs. All were four-wheel drive and four wheel steer. Checker still has one and it looks as new as it did in 1940. Among other Army vehicles made were tank retrieval trailers, tank recovery vehicles, all types of trailers, both semi and otherwise, Signal Corps. bodies and petroleum trailers.