Would a transmission leak make your car shake at 65 mph?

It is unlikely that a transmission leak would cause your car to shake at 65 mph specifically. However, if the transmission fluid is low enough due to the leak, it can put strain on the transmission system and consequently lead to vibrations or shaking at various speeds. Additionally, driving with low transmission fluid can cause damage to the transmission itself, so checking the fluid level regularly and addressing leaks promptly is important. If the shaking persists or you notice other symptoms like unusual noises or difficulty shifting gears, it is advisable to have your car inspected by a mechanic to determine the exact cause and ensure safe driving.