Question about 1993 Ford F150 SuperCab
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Posted on Jan 02, 2017
Fairly simple job...Unbolt everything connected to it, take it out, put new one in and replace everything you unbolted. Support the frame, so you can get the unit out and nothing but the diff comes down after all hardware is out. Most bolts are really tight and rusted , so be prepared to have them fight you and when getting one from junkyard, ask if you can have the hardware with the unit so you have spares on hand.
When buying the replacement, make sure it has the correct size driveshaft yoke on it.
This is a good opportunity to custom tailor the diff to your needs...count the ring gear teeth on yours and then divide by the number of teeth on the pinion this gives you the ratio. If you do a lot of low speed driving and pulling loads, you may want to change to a 3.90 ratio or even a 4.11. If you do a lot of long high speed driving, go to a 2 series rear ratio. If you are happy with what you had, match that. (changes require speedometer gear change or it will be a bit off)
Always change the diff lube when you change a diff. Never buy one without removing the cover and looking at gears and checking for fine metal in the lube.
Posted on Sep 17, 2009
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