Fluid for front diff
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Senior User
Joined: Mar 2002
Posts: 450
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From: Charter Oak, Iowa
Fluid for front diff
I am just completing a major O-haul of my front axle on 1989 F150 4X4. Any suggestions for fluid for the diff.? Synthetic or dino-gear.?Any particular weight? I use the 4X4 mostly in the winter. Biggest complaint with the factory fluid (whatever that was)is sluggishness when extremely cold. Tend to leave lockouts engaged all winter and drive short distances every day. I 'spose I shoud have posted in oils and lube column but thought this would apply here too. Will replace rear fluid eventually and am looking for suggestions there too.
Thanks
Thanks
Senior User
Joined: Jul 2001
Posts: 235
Likes: 0
Fluid for front diff
[updated:LAST EDITED ON 23-Oct-02 AT 05:54 AM (EST)] Whatever you use in the rear axle should be sufficient. I had a '93 F-150 which was recommended Ford "4x4 Gear Lube" in the front, Mercon in the transfer case, and 80W-90 in the rear. These specifications were found in the owner's manual. I don't know what made the front so special as to have its own unique fill, but it is still a differential and should be maintained as one. Due to the spotty use of four wheel drive, the 4x4 Lube may have additional rust inhibitors or some such thing. Perhaps Mr. Henderson or one of the other helpful folks here would know for sure. My personal choice would be to fill it with the same 80W-90 conventional oil recommended for the rear.
Wish they still made trucks like they used to. My Bronco takes the same weight and type of fluid throughout, transmission included. All it took was a five gallon pail from NAPA and a hand pump to service the entire drive line
Wish they still made trucks like they used to. My Bronco takes the same weight and type of fluid throughout, transmission included. All it took was a five gallon pail from NAPA and a hand pump to service the entire drive line
