So my 2011 F150 has continued to provide the joys of slip bump (despite its the 145in WB with one piece driveshaft which doesn't suffer from that problem). Lubricating the slip yoke splines fixes the problem 100% for a few thousand miles AT BEST. Even going with a moly paste did not fix the problem for longer than that. I'm at the point where its time to consider parts replacements. Basically two options I'm exploring.
1. Raptor transmission mount. Not directly related to the slip yoke, but its supposed to be a more rigid bushing and reduce dirveline vibration and pinion angle changes.
2. Slip yoke and/or transfer case output shaft replacement
I'd like to explore the second option a little. The slip yoke would be as easy as replacing the u-joint, basically. I would think replacements would be easy to find at drivetrain shops. What about the transfer case output shaft? Transfer case would be fairly easy to drop out but is it a big deal to open it up to replace this shaft? I'm really stumped on how these splines are INTENDED to be lubricated from the manufacture, as service info and diagrams have been difficult for me to find. Does anybody have much knowledge on transfer cases? I don't mind doing a little work, but I don't want to waste my time tearing stuff apart and replacing parts that won't help.
FYI, yes I've tried the Ford recommended lubrication (the blue teflon lube, XG-8 I think). It lasts a few thousand miles. So does the white teflon grease they sell with the kit. So does a heavy moly paste. So does a heavy moly paste cut with synthetic ATF. Like I said, I want to explore FIX options now.
1. Raptor transmission mount. Not directly related to the slip yoke, but its supposed to be a more rigid bushing and reduce dirveline vibration and pinion angle changes.
2. Slip yoke and/or transfer case output shaft replacement
I'd like to explore the second option a little. The slip yoke would be as easy as replacing the u-joint, basically. I would think replacements would be easy to find at drivetrain shops. What about the transfer case output shaft? Transfer case would be fairly easy to drop out but is it a big deal to open it up to replace this shaft? I'm really stumped on how these splines are INTENDED to be lubricated from the manufacture, as service info and diagrams have been difficult for me to find. Does anybody have much knowledge on transfer cases? I don't mind doing a little work, but I don't want to waste my time tearing stuff apart and replacing parts that won't help.
FYI, yes I've tried the Ford recommended lubrication (the blue teflon lube, XG-8 I think). It lasts a few thousand miles. So does the white teflon grease they sell with the kit. So does a heavy moly paste. So does a heavy moly paste cut with synthetic ATF. Like I said, I want to explore FIX options now.
