Originally Posted by dbworms
consider me a complete noob in this subject matter. I googled double joint drive shafts, but I don't see any parts that appears to fit the bd5.
I am running standard drive shafts that come with the bd5. I only had it for a few weeks and I assumed the chattering noise was from the low ground clearance and the hellaflush style wheel fitment scraping the body.
The chatter is because the standard driveshafts are what is called a universal joint. What this joint can't do is provide a constant rotational speed once the joint is at an angle. That means that the main bone is spinning pretty consistently while the drive axle is constantly accelerating and decelerating twice(?) every 360 degrees. As you can imagine this causes a great amount of G on the wheel when spinning really fast. This coupled with wheel imbalance and general slop causes a pretty big vibration or 'chatter'.
A true CVD (litemodz cvs) or a double cardan joint shaft (spec-r ecs) can rotate the axle and bone at the same speed consistently throughout the full 360 degree rotation at large joint angles. Therefore there is no acceleration and deceleration of the axle/wheel combo; this is why they remove the chatter vibrations.
Hope that helps. Ask away if there is anything else you need
Or if someone is real clever and I've said it wrong, feel free to
me and put me right