Can you use rubber hose to replace transmission cooler lines?

Using rubber hose to replace transmission cooler lines is not recommended. Transmission cooler lines are typically designed to withstand high temperatures and pressures, and specialized metal or reinforced rubber lines are better suited for this purpose. Standard rubber hoses may degrade quickly and could lead to leaks or failures, resulting in potential transmission damage. It's best to use the appropriate replacement parts specifically designed for transmission cooling systems.