Change Your Differential Fluid This tech article was originally posted at FordF150. Low fluid level in the differential may cause it to overheat and fail. Must be something in those numbers indicates Synthetic - And it did specify the lube level at. It's buttoned up, working fine, and pretty now, but that square plug really threw me just when I thought I was done. Thank You in advance for any and all responses.
I'll go home and see how much I put in and post my results. If you drive in dusty areas, tow a trailer, idle or drive at low speeds for extended periods, or drive for short periods less than four miles at a time in below freezing temperatures, even smaller intervals are recommended. It's leaking fluid nearly out and he seems to think that the diff is shot even though 4x4 still works My question is. My 4-wheel drive is having trouble. I know that the lube has at least 27k on it. Modern cars and trucks need less maintenance than the vehicles of 25 years ago, but they still need fluid changes, checks, and adjustments.
The F150 is a half-ton, full-size pickup truck made by the Ford Motor Company. Follow these instructions at your own risk. It is primarily intended for Ford F-150 trucks but most likely also applies to other Ford models and years. The type of oil used in the front differential on four-wheel drive models may be different than what is used in the rear axle. Looks like someone used red loctite or equivalent to install these plugs. Does anyone know what the correct fill level of the front diff is? F-150 Rear Differential Oil Change This procedure was performed on a 4x4 with 4.
. I did find the capacity spec for the 2002 Navigator front diff. Because frequent maintenance enhances the efficiency, performance and resale value of your car, we encourage you to follow our schedule. Note: Some Ford techs recommend not using the Ford spec 70W140 synthetic due to it not being able to absorb water and possibly leading to corrosion and failure of parts within the axle assembly. If you need guidance, or step by step instructions, check out our , or get the , or our. . I know I found the exact amounts somewhere or a guide but can't see to find it.
There is a small pocket in the diff that holds half a cup of oil in the bottom. If a leak is detected, the gear oil should be checked. I think I'm gonna go with ye 'ol backwoods method. Note the position of the two tags on the bolts. . Or fill the axle on level ground until oil starts to run out of the filler hole.
I started at the bottom, moved up the sides, and finished at the top bolt. I still have the bottle at home from when I changed my fluid as well. Tighten the bolts all one more time to spec, then check each one for tightness. What follows is our quick reference guide for the 10th generation 1997-2003 Ford F-150 pickup truck, F-150 based light duty 1997-1998 Ford F-250 non-Super Duty , and 1997-2006 Ford Expedition and Lincoln Navigator. You also fill the diffs until fluid starts to come out the fill plug hole. Installing a replacement gasket is also optional. If the total weight does not exceed the truck's towing capacity, then go for it.
A mechanic is telling me the problem is with the front diff. There is no specific order. Wipe off oil anywhere you can get to on the gears and walls inside the axle. F150s that are equipped with four-wheel drive also have a front differential that is very similar to the rear. I didn't realize the front diff came from the factory filled with synthetic lube, but I knew the rear diff did.
Loktite is optional on the threads of the plug. Three of them are almost 10K pounds, plus the weight of your trailer which you should know as well. This article has been generously donated by Peter Ferlow. Axle service interval 30,000 miles or 24 months according to Haynes. Personally I wouldn't do it. . If I can make a picture post, you'll be able to see how dirty it was and how much gear oil was left over.
Ford calls for a synthetic gear oil to be used in the rear differential on most later model F150s. For that reason I chose Redline 75W90. Ford shop manual indicates the front diff fluid for that year was not synthetic. Ford shop manual indicates the front diff fluid for that year was not synthetic. Please note this is not my recommendation. A stock Cherokee weighs about 3,300 pounds. I didn't think the old lube was very dirty as it drained out of the diff, but afterwards I poured some of it in the empty quart bottle to compare to the new lube.