... Probably best not to hotlink, yannow.
And using THIS pic, which joint is it you're talking about?
http://www.seibertron.com/transformers/ ... 105/2/110/From the split up:
The split is a dual-pinned dual hinge joint
Above that is a pinned swivel joint
Above that is the transform only "side to side" elbow, which is also pinned.
Above that is the "actual elbow. Guess what? Pinned.
Above that is the pivot INSIDE the shoulder for transforming. It's in place due to the shoulder pieces on either side. This joint can be disassembled by simply taking the screws out of the shoulder and can be tightened by tightening those same screws, no superglue trick needed.
Next up is the articulation shoulder up-down, which is pinned.
And finally we have the shoulder pivot, which is held in place by the two halves of the torso. Tighten the three screws on the back of the torso to tighten this joint.
If the joint you need to tighten is one of the pinned joints, there IS a way to do it, but it is VERY tricky, VERY difficult, and has a chance of permanently messing up the figure if your hand isn't steady enough.
1 ) Decide on what joint needs tightening.
2 ) Get a tube of liquid superglue that has "modelling tips" - you can probably get them at a hobby shop (of the type that carries model kits).
3 ) GENTLY release a LITTLE bit of the superglue directly on the gaps of the selected joint.
4 ) IMMEDIATELY start working that joint, and any other nearby joints, back and forth. Keep doing it until your hands get tired, then do it again, for at least 2-3 minutes.
If done wrong (too much superglue, miss the joint, don't work it enough), this CAN freeze one or more joints in place, making it no longer able to transform or pose, so take GREAT care when using this method - make SURE you knw what gaps are part of what joint, for example.