1999 Dodge RAM U-Joint question (66k miles)

Met a guy yesterday who took my suzuki 750 motor that he bought from me. He is a truck driver and an all around nice guy. I gave him a ride from his semi to my house and back, and he told me that my U-Joint in
my 1999 Dodge RAM is going bad. He claims that he "heard it" when I was accalerating or switching into reverse. I could not tell much, but figure that he had no reason to lie to me.
My questions are 1) just what exactly should I look for to see if the U joint is bad and 2) how hard is it to DIY replace it.
thanks
i
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Assuming it's on the driveshaft, you'd look for any slop in the driveshaft by trying to turn it back and forth while holding the rear pinion still with a big pair of channel locks. Also, any apparent grease leaking out passed the cup seals on a stock U-joint are a tell-tale sign of impending failure.

Actually, pretty easy. You remove the driveshaft (by unbolting the straps at the rear differential yoke, and unbolt the center carrier bearing from the frame [if you have an extended cab, longbed truck]), then pull the slip joint out of the transmission (or transfer case, if you have a 4x4). Have the rear end raised up on jackstands, or the vehicle parked facing downhill, to prevent fluid loss out of the transmission/transfer case while the slip yoke is out.
Remove the snap rings with a pair of pliers (squeeze them together and pull them out), then with a ball joint/U-joint press borrowed/rented from your local auto parts store, press the U-joint out (pick up a cheap service manual, like a Haynes #30041, from the auto parts store for details and pictures on this. You'll also use the press to press the new U-joint caps in. Re-install the snap rings, and re-install the driveshaft.
Best to do both if you're going to do one - U-joints are cheap. Also, mark the orientation of the slip yoke in relation to the driveshaft, and the driveshaft in relation to the rear axle yoke, so everything goes back together the same way. Go easy when re-installing the slip yoke into the back of the (transmission/transfer-case) - you don't want to damage the oil seal. Also wipe down the slip yoke thoroughly and apply a little trans fluid or oil over the surface of the slip yoke, again to let is slide through the seal nice an easy.
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just did my ram 2500 4 wheel drive, when u put it in reverse you will hear a clang, thats the joints, mine had 6 joints total parts on the joints was $382.50, they were a bear to get out as the old ones where in there pretty good, could'nt press them out had to beat them out, maybe yours will be easier, also 4 wheel has a front shaft also. good luck.
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With my ball-joint press and an impact wrench, I blew out the end of a bearing cap by driving the cross through it (accidentally had the press interfering with the movement of the cap). There's no way any rust is going to stand up to that kind of pressure.
You just needed a better press :)
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