how hard of a task is this for a mildly mechnaically inclined person? what kind of fluids should i replace it with

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The TRUCK:
1999 Black F150 XLT Sport 4x4 Flareside, 4.6 Triton V-8, Manual Transmission, Captains Chairs, Power Everything.

Appearance Changes:
Button-down Tonneau Cover, Webasto Sunroof, Spray-on Bed-liner, Xenon Fog and Headlights, Blackwidow Car Alarm, Window Tint, Wet Okole Seats (ALL), BedRug, Ford Seat-belt Shoulder Pads.

Stereo:
2 10" Kicker CompVR's on Fosgate 360a2, Kicker Components Front & Fosgate 5x7 Rear on Fosgate 200a4, Blaupunkt Muchen Deck.

Performance:
265/70 R17 Yokohama Geolandar A/T+, Borla Split-Rear Cat-Back Exhaust, K&N FIPK, Rancho RS9000s, Helwig Rear Anti-Sway Bar.

 

Try Redline 80 or 70W-140 it already has the friction modifiers that Ford calls for. Your truck calls for synthetic in 70W-140. If you don't want to use Redline gear lube then you will have to get the friction modifier from Ford.

Now, if your rear axle is 8.8-9.75" then you will use 4 oz. of modifier or if it is 10.25" then use 8 oz. It should take approx. 5.7 pints, but fill it to the bottom of the fill plug hole.

Almost forgot, the gasket is really cheap around $6. Might as well change it while you are at it. The procedure from start to finish might take you about an hour and the work is very easy. Just look at your old lube for any pieces of metal and inspect your gears for any signs of obvious damage that may need to be repaired.


[This message has been edited by bubblehead (edited 06-25-2001).]

 

Most of Ford's diffs these days do not use a gasket: Just a bead of high temp silicone.

If you have the ability to perform your own tune ups, you should have the skills to chakge your own gear oil.

Tony