dish soap to get it back on the control arm. Slippery enough to get it on there then drys out for a tight grip.
OP: if you mean something to press the bushing out of the bracket, I'd recommend a hydraulic press. I've heard it's a bitch to get those out. I always replace the whole thing for that reason. However, I have the ball joint press you speak of and it works great fro RTAB. If I remember right, there isn't enough room to fit tool where it needs to go to do the rear diff bushing...
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