It is not advisable to drive with a stiff clutch since this is a sign of an underlying problem that could get worse with time. Many issues, such as a damaged clutch disc, a malfunctioning hydraulic system, or misaligned clutch parts, might cause a stiff clutch. If you keep driving, you can have a total clutch failure and become stranded. It can also result in early wear on other components and undue strain on the transmission. Some drivers look into used car parts for sale to cut costs even though replacing the clutch unit as a whole might be expensive. But, in order to stop more serious harm, it is imperative that the problem be resolved right away. A qualified mechanic should identify the issue and suggest the best course of action for repairs or replacements.