SO, what kills u-joints?

[72cudamaan]

Every oil change or 3K miles is normal.  Do you romp on the car at all.  Excessive torque could brinell the cross and prevent the needles from rotating properly.

[shadango]

Every oil change or 3K miles is normal.  Do you romp on the car at all.  Excessive torque could brinell the cross and prevent the needles from rotating properly.

"Honest officer, I never romp on this.  Its my price posession. I baby it."

Translation: hell yeah I romp on it. 

LOL

I dont think I have excessive torque though.....318, j heads, cam, intake, carb, headers....goes good, but with 2.76 gears there isnt excessive low end (Hoping to switch to 3.55s).....

[brads70]

So, how do you know they are "hardened" ?

The first ujoints I bought (one of which is still in the car, tranny end) are "super heavy duty" units from napa.....for 4x4s.

It said so on the box? 
http://www.federalmogul.com/en/AftermarketSolutions/NorthAmerica/SteeringSolutions/Products/PrecisionUniversal-Joints/
http://www.offroaders.com/directory/products/Yukon-Super-Joints.htm

[shadango]

yeah....it had a picture of a 4x4 and said "super heavy duty".....they listed for $45 at NAPA....they sold them to me for half that. 9Go figure...I HATE that stupidity too...put the real damn price on stuff!)

It could have been I didnt lube enough, the vibes I had, the angle or maybe all 3....or the tech who put them in the shaft for me could have screwed uo...who knows.

Well, this time at least I know the tech did th best he could (me).....LOL