Originally Posted by
EricPero
So if I grab the spindle and try to move it up/down/left/right, and it does move, then the knuckle seal is bad? If so, is this the correct part I need?
Pinion Seal - Front Axle
<table width="570" border="0" cellpadding="2" cellspacing="2"><tbody><tr><td width="100%"><table><tbody><tr><td valign="top" width="80" align="right">Part: </td><td valign="top" align="left">NOS 15503 </td></tr><tr><td valign="top" width="80" align="right">Product Line: </td><td valign="top" align="left">NAPA Oil Seals </td></tr></tbody></table></td></tr><tr><td colspan="2" align="middle"><table border="0"><tbody><tr><td style="white-space: nowrap;" align="right">Price
Unit
</td><td>:
:
</td><td style="white-space: nowrap;" align="right">26.49
Each
</td></tr></tbody></table></td></tr></tbody></table>
no... to properly tell if the knuckle seal is bad... rip the hub off as you said you did already, grab the stub shaft with a rag - use my pdf for ball joints and yank on the axle shaft... you can pry the u joint to help you get it out - its got a good seal in the diff so the first time is tough.
The part you showed is a pinion seal... this goes between the pinion gear and the front driveshaft of the front differential... totally different.
here is the tool....
Lisle LIS38060 AXLE SEAL INSTALLER FORD F SERIES TRUCKS
here is where the knuckle seal (sometimes called a main seal or main axle seal) goes
http://quad4x4.com/images/front%20ax...arts%20054.jpg
pull the axle shaft out... the knuckle seal goes on the stub shaft (short axle) and the dust seal goes on the axle shaft - longer axle.
i had to get my seals at ford... but i recall somebody finding them online somewhere
they are 80 bux from ford
they are called main seal or knuckle seal NOT PINION SEAL
just making sure you know
kenny