My 05 LX70 is sitting at 216K (about 100K that with 33” tires). I’ve owned it about 6mos. I think it has a slight driveline vibe under load- most noticeable at ~50 to 60mph under steady highway speed. Very slight vibration felt in the floorboard. I’ve greased the u-joints with Lucas red n tacky a few times since I’ve owned it. This weekend, I filled the slip yokes with palladium moly grease. The front I was able to grease until the old came out around the seal. The rear took countless pumps of moly and finally a little bit came out around the seal. I kept pumping and noticed at that point that the excess was coming out at the end of the shaft by the u-joints. At that point I removed the slip joint yoke zerks from the front and rear shafts and took it for a good hard drive on some bumpy terrain and then past my local AutoZone to load up my suspension on some killer speed bumps. Brought home from my expedition run and put the zerks back in. I shed a lot of moly on that trip and the underbody shows it. Anyway, I re-pumped the rear slip joint yoke with moly, still no notable old grease coming out around seal, removed zerk and grease shot out with extreme pressure. Drove my expedition route again and replaced zerk. No clunks, no thuds, when selecting gears or driving. But, there still seems to be a slight floorboard vibration 50-60mph. Should I pull the rear shaft, separate it, clean it up as well as possible, and relube? Should I just keep driving it until it gets worse? Or should I just swap out the driveshafts with new OEM? I can’t detect any slop in the ujoints- expect maybe a very, very faint clunk when working rear shaft in vertical motion. It’s extremely faint, if any play at all.
Driveshaft: Service or Replace
- Thread starter Indiana80
- Start date
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reading along...
I'd take it apart, clean and re-lube before going the new driveshaft route. Vibration could be from rear control arm bushings, trans mounts etc. Some folks on here have swapped in brand new OEM driveshafts chasing vibrations and only found that the vibration was originating elsewhere.