Did the front end on my GMT800 - upper & lower LCAs, spindles (Belltech lowering), tie rods, etc.
There's one lower ball joint that refuses to accept grease. I've tried FOUR different fittings, changed the tip of the grease gun, but it just will not fill up. It just spooges out.
Disclosure: these are cheap-ass Detroit Axle brand parts.
Help me GRM, you're my only hope.
You can try exercising it a bit, but more than likely you'll have to replace the ball joint. It happens.
Grease joint rejuvenator: https://www.amazon.com/Innovative-Products-America-7862H-Rejuvenator/dp/B0000AXDB3
I use one at work on kingpins and shackles that have petrified grease in them.
Fill it full of ATF, put it on the fitting and pound it with a hammer. The tool pushes the ATF through the joint and flushes the old crap out. Once it's flowing nice, put the grease gun on and pump until you have grease coming out.
Or you can buy the needle attachment, pierce the boot and pump it in that way but it's a bit of a hack way to do it.
In reply to Knurled. :
It's had a few miles of exercise on it, chasing down the different fittings and gun tip. I didn't want to swap BJ, hence getting a loaded LCA... 
In reply to ShawnG :
This is a new ball joint, no old grease in it. Not even any new grease in it, unfortunately.
I had thought about the needle method, but it goes in for an alignment in the morning, at a real frame & axle shop, not a hack quick align place. I'll see what they can do.
Jack up the truck and take the load off the joint.
Toyman01 said:Jack up the truck and take the load off the joint.
This might work. Support by the control arm (or to be safe, jackstand under frame and jack up control arm with floorjack) to make sure that the spring isn't loading the ball joint.
It's worth a shot (har har), sounds like you don't have time to warranty it out.
Worst case, it doesn't work, and you drive it until it fails, at which point you warranty it out. Or maybe it will take grease in a few hundred miles.
You'll need to log in to post.
