Shudder coming from truck Quiz

[KenP]

This is a quiz. See if you can figure out the problem from the symptoms. I haven't even told CP about this so she can try also (We know that won't happen because she doesn't read this section, but....).

When first accelerating I get a shudder throughout the truck that lasts just a second. If I accelerate very slowly, nothing.

When slowing down I get a shudder as soon as I hit the brakes. However, if I stop extremely slowly, as in coasting, nothing.

Sometimes I get the shudder when turning on residential streets.

Please remember we're talking about BigNasty with big tires and a lift.

It took me two days to find the problem. Let's see if you can do better.