Ddawg 99 f.150 5.4

Hey guys I have a 99 f150 4X4 and was wanting to know how to grease the slip yoke. Thanks in advance, Clay.

blupupher

iTrader: (2)

You don't grease a slip yoke, it is lubricated by the fluid in the transmission (or transfer case in a 4x4).
Do you mean the u-joints?

white89gt

Actually, you do grease it. Ford has issued a TSB on it.

You need to pull the D/S out, and the PTFE grease goes inside where the splines are. From the factory they were coated with teflon, and eventually that wears off.

screamineagle

This is very wrong...

white89gt

Here's a pretty good video or two on it.

This is a 2011, but it's the same principal.

blupupher

iTrader: (2)

So greasing the splines of the slip yoke? Never heard of that.
What TSB #. Only TSB I can find is for newer trucks, not our gen.

The slip yoke is lubricated by the fluid in the transmission/t-case. That does not need to be lubricated. That is not wrong.
As for the splines needing grease, that is news to me, never heard of it.

white89gt

It's easier to find that one because they are more prone to it. The 97 model year had it's own TSB, which is 97-13-21. Really, they should modify it and include all of the 97+ trucks.

Also, this lists the TSB's involved on the side. It is the grease Ford recommends as the fix:
https://www.fcsdchemicalsandlubrican...tegory=Greases

blupupher

iTrader: (2)

Well good to know. Never heard of this issue.

Jbrew

Yea, it's the "clunk" TSB. I haven't watched vidyos posted, but you use brake cleaner medium vap, get everything spotless then apply a very thin coat of teflon grease.

screamineagle

Ok, you weren't completely wrong lol.