Have Transmission Questions? Ask a Mechanic for Answers ASAP
Hi, that shuddering is caused by either a warped flywheel or pressure plate. The transmission will have to come out to fix it. You could either replace the flywheel or take it to a machine shop to get resurfaced. I'd get a new clutch kit with a pressure plate and throw out bearing while you're there, it really doesn't make sense to replace the pressure plate and not the clutch disc.
Is there anything else I can help you with?