The Ford Transit in manual transmission form has been fitted with a dual mass flywheel since the early 2000s, but it's not a major known failure point on the vans. Generally a DMF will last the life of the clutch at the very least - around 100,000 miles depending on how it has been driven. Clutch and DMF replacement on the Ford Transit is generally less expensive than on passenger cars as well as access is far easier. The labour time for the job books at 3-4 hours, so at an industry average rate of £80 an hour (independent) banks on £360 + VAT plus parts - around £700 in total to do the job if needed.