"hammer" is a strong word. More like "use a hammer to "tap" it together" is the meaning.
Once the U joint is assembled to the drive shaft, you should be able to move it around freely with very little resistance if done right. If you have to apply force to move around, you've got it to tight.
Are you sure the "rattle" is coming from the U joint?
check to make sure your ujoint actually fits the yoke coming out of the rear. mine does not fit tight and i have no idea why. i bought both u-joints the local autozone offered as replacements, one was too big, the other was too small. the one that crapped out on it was too small as well. so here's what i did.......I centered it the best i could using an old school spark plug gapper then used copper washers as a shim between the clip and the cap on the joint.
now it's tight and no vibrations at all. not saying it's going to hold forever, but until i can find an actual u-joint that fits, its the best i can do. if your drive shaft slides back and forth under the clips holding the u-joint to the yoke, i'd give this a shot. use copper instead of the other washers cause the bend and form.
Yo Ho Yo Ho a Pirates Life For Me......
1992 Islander - I6 - 3" Body Lift; 2.5" RC Suspension Lift; Mystery Shackle Lift; 35x12.50x15 on 15x8's.
check your hangers for your exhaust. if your exhaust is touching any metal (frame, tow bar, control arms, skids) when you coast, and rpms drop, it can cause it to vibrate and make a noise. mine does this, but under hard acceleration at low rpms. take a look.
Ryan - A good eye, a light foot, and a smart rig. Bolt-ons are boring
Are you referring to my question about the rattling sound or the shakiness during acceleration?
around here, you can swing in at almost any shop, explain what your'e hearing or whatever, they usually take a look or send someone out. some will simply say make an appointment and we'll take a look, but some will actually spend a dew minutes trying to help you out. They may be able to find it.
The shakiness during acceleration, man, that could be anything. Might not even be related or could be the whole cause.
If you can get it the area of the noise, front back, left side, right side, general area, you can narrow from there. Probably will need a second person to assist.
Jeeps rattle, it's aggravating. worse vehicle I've had when it comes to noises......