So I recently installed the rough country 2.5 inch lift kit and after the alignment it seemed to be doing well. A few weeks ago I noticed the was a buch of grease flung about under the car. After inspection there were no rips or tears and the clamps did not move or appear defective. Right now it looks like the cv axle is just at a bad angle and it is forcing out the grease. So, looking into it there are extended travel cv's but non for my specific model/year (2002 LS blazer 4dr 4x4). One thing I have also looked into is if the Zr2 cv axles would fit and fix this since I was reading somewhere they have a stock lift so it would reason they would be able to handle the steeper angle. So if anyone whos had this problem can point me in a direction or answer about the Zr2 swap it would be helpful. Ty in advance.

 

If you caught the slipped off boot early enough so that the joint was not contaminated, you can put on a new boot. I had this happen to an inner boot after I did a small lift. In the short term, I was able to reinstall the boot with some extra axle grease and secure it in place temporarily with a large hose clamp. I suspect it slipped off because the thermoplastic oem boots are somewhat stiff.

At first I was going to just replace the axle. But I had a hard time getting the new one in and I felt stuck. The retention ring on the inner front axle shaft would just not go in and seat. Instead I installed a neoprene boot I found at NAPA that was more flexible than the original plastic one. I did a thorough cleaning and added new grease while I was at it. I believe I did this in about 2017. This fall while doing an oil change and lube, I did notice that the neoprene boot had started cracking. I'm planning on replacing it in the spring when I replace the lower ball joints. If you go this route, you might need to borrow a special clamping tool for the bands for the boot from an auto parts store.

I saw on some off-road forums, a Toyota one I think, that replacing boots can be a regular thing.

L/R inner boot kit: https://www.napaonline.com/en/p/CVB6862374
L/R outer boot kit: https://www.napaonline.com/en/p/CVB6862340

If you find a better boot kit with even more durable neoprene than I used, be sure to let us know.