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Transfer case and slip yoke #4554817
10/26/17 04:17 AM
10/26/17 04:17 AM
Joined: Apr 2012
Posts: 2,698
West Michigan
buck91 Offline OP
buck91  Offline OP
Joined: Apr 2012
Posts: 2,698
West Michigan
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.


2011 F150 4x4 5.0L
1996 Mustang GT 5spd/ragtop
Re: Transfer case and slip yoke [Re: buck91] #4554851
10/26/17 05:24 AM
10/26/17 05:24 AM
Joined: Apr 2009
Posts: 244
Reno, Nevada
Langanobob Offline
Langanobob  Offline
Joined: Apr 2009
Posts: 244
Reno, Nevada
If you don't get good responses here I would try asking your questions at ford-trucks.com. Nothing wrong woth this site, just that you will find a lot more experience with your year F150 at a site specializing in Ford trucks.

Re: Transfer case and slip yoke [Re: buck91] #4554872
10/26/17 05:57 AM
10/26/17 05:57 AM
Joined: Apr 2012
Posts: 2,698
West Michigan
buck91 Offline OP
buck91  Offline OP
Joined: Apr 2012
Posts: 2,698
West Michigan
Yeah, I actually did double post already 😃


2011 F150 4x4 5.0L
1996 Mustang GT 5spd/ragtop
Re: Transfer case and slip yoke [Re: buck91] #4554923
10/26/17 07:30 AM
10/26/17 07:30 AM
Joined: Feb 2011
Posts: 6,775
Hudson, NH
LeakySeals Offline
LeakySeals  Offline
Joined: Feb 2011
Posts: 6,775
Hudson, NH
I read that trucks with leaf springs suffer from "Axle Wrap" which binds the yoke splines when accelerating or decelerating, certain conditions, etc. Installing a leaf spring clamp is worth a try before you tear things apart.

If you have leaf springs that is...


06 Escalade 6.0L LQ9 AWD 165k M1 0w40
03 Maxima 3.5L POS 152k ST HM 10w30
Re: Transfer case and slip yoke [Re: buck91] #4554944
10/26/17 08:06 AM
10/26/17 08:06 AM
Joined: Apr 2008
Posts: 13,000
Onondaga County
Miller88 Offline
Miller88  Offline
Joined: Apr 2008
Posts: 13,000
Onondaga County
I had that problem with my Cherokee. The only thing that worked was anti seize compound. Grease didn't seem to do it.


18 Forester 2.5I 6M
00 Jeep Cherokee
01 Ford F-350 XL 4x4 5M
Re: Transfer case and slip yoke [Re: Miller88] #4554947
10/26/17 08:10 AM
10/26/17 08:10 AM
Joined: Apr 2010
Posts: 4,565
Storrs, Connecticut
jeepman3071 Online content
jeepman3071  Online Content
Joined: Apr 2010
Posts: 4,565
Storrs, Connecticut
Originally Posted By: Miller88
I had that problem with my Cherokee. The only thing that worked was anti seize compound. Grease didn't seem to do it.


+1

Same with mine.


2000 Jeep Cherokee 4.0L (181k) - Pennzoil 10w30, Napa Gold 1516, Magnefine trans filter
2009 BMW 328i (36k) - Castrol Edge Euro 0w40, MANN HU816X
Re: Transfer case and slip yoke [Re: buck91] #4555962
10/27/17 06:25 AM
10/27/17 06:25 AM
Joined: Apr 2008
Posts: 13,000
Onondaga County
Miller88 Offline
Miller88  Offline
Joined: Apr 2008
Posts: 13,000
Onondaga County
And, contrary to what a lot of people say, it doesn't wear out the slip joint in the driveshaft or the tailshaft. I eventually converted the transfer case to a fixed yoke, but never managed to wear out anything.


18 Forester 2.5I 6M
00 Jeep Cherokee
01 Ford F-350 XL 4x4 5M

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