Where did you find that?
https://www.warhistoryonline.com/military-vehicle-news/jeep-crate-for-50.html
A Military Jeep in a Crate: Was it ever true?
Jeeps were produced and packed this way for shipment to U.S. forces and countries like England and the Soviet Union who the U.S. supplied during WW II. At the Ford Motor Company assembly plant in Richmond, CA, about 70% of production was boxed due to their close proximity to the San Francisco port.
Boxing up a jeep was expensive and time consuming so it was only done when absolutely necessary. Jeeps that were crated were complete vehicles, not a box of parts — windshields were folded, wheels taken off and a few other things done to minimize the cubeage. Very few, if any, of these crated jeeps remained in the United States, even during the war. After more than sixty years, there are probably none left. Several organizations and dealers have had a substantial reward offer for years for anyone who can produce one and no one has claimed the money.
Here is my secret method:
I Googled "WWII Jeep In Crate" and clicked the images option.