94' Chevy 4 x 4 Problem

[tailnbone]

I've got a problem with my truck and need some opinions and advice. Usually I can figure it out, but this time I'm puzzled. Hopefully you guys can shed some light.
Whenever I take off from a stop I can feel a slight shimmy in the rear end of the truck. More noticeable at 35 mph or less. Whenever I hit a bump in the road it seems to take a while for the truck to stabalize. If I press the brake pedal between 45 - 65 mph the whole truck wants to bounce up and down more so in the rear. This bouncing up and down is driving me up the wall.
I've replaced the following parts on the truck:
Rear brake drums, wheel cylinders, spring kits and pads.
Front brake rotors & pads.
New master cylinder.
New shocks all the way around.
Rear outer axle bearings and seals.
New tires all the way around.
The brake pedal does pulsate when applying the brakes, so I know I have a warped rotor or drum, (Probably made in China).
Do you guys think this would cause all the bouncing or could I possibly have a bent axle or something. I don't know what else to replace except for the truck itself.
I just paid it off last August, its been kinda nice not having a truck payment and I really can't get into another payment rigtht now.
Any ideas or suggestions would be greatly appreciated.

[Rock Chuck]

U-joints. When they go bad, they do all kinds of shaking, rattling, and rolling.

Dick

[tailnbone]

Oh yeah, I forgot, I replaced the u-joints on the driveshaft too. But, i'll have to check the universals on the output shaft of the transfer case and front hubs.
I had the bed off recently because I had to replace the fuel pump (in the gas tank) and the fuel lines. While I had it off I cleaned up the frame and undercoated everything. I didn't notice anything else broke or loose.

[DaveHawk]

yep, u-joints was my 1st thoughts.