I have my car in the shop. It is a shop I have used before and I do trust them. The car has a grumble vibration in first and a bit in second under moderate accelleration. It feels like running on gravel when the rocks slide out from under the tire. I thought it may be tires since they are worn. After replacing the old Generals with new Michelin PS 3+ the same vibration is there. The shop tells me it is the flex disc (I assume rear only) The cost is 2 grand. I see NeedsWings has them for $100. Is it really that difficult to replace? I see a few videos on You Tube for the bigger Mercedes passenger cars and it is just 2 wrenches and a pry bar; ignoring the car lift. Is this something easy enough to do in a drive way on a weekend? If so, is it just as easy as unbolt, pry apart, remove disc and installation is the reverse?

As for skills; I do not do major surgery on cars, but I can certainly replace an alternator, break pads and the like. I have ramps, jack stands, tools and a big enough pry bar. Is it a repair worth 2k?