What fluids do the older transfer cases use?
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Fleet Owner
Joined: Jun 2004
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From: Rio Rico, AZ.
What fluids do the older transfer cases use?
My employee has a 1989 F-250 4X4 with the 5.8.
Rear axle code is 39.
He doesn't have an owner's manual.
What oil to use in the rear axle?
And transfer case? ATF?
Thanks.
Rear axle code is 39.
He doesn't have an owner's manual.
What oil to use in the rear axle?
And transfer case? ATF?
Thanks.
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Joined: Jan 2001
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From: Virginia
Pull the plug on the transfer case and stick your finger down in the oil. If it's red and thin, then more than likely it's atf fluid. Most of the later ones did run atf.
Do the same for the rear. If it really stinks, is thick and dark, it's 80-90w gear oil.
Do the same for the rear. If it really stinks, is thick and dark, it's 80-90w gear oil.
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Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
Thanks, guys. He put Mercon in the transfer case and topped up the rear axle with some of my Redline Shockproof. We still don't know if the rear axle is LS or not. Can't find a reference for axle code 39.
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Joined: Jan 2001
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From: Virginia
Jack one rear wheel off the ground, and try to turn it with the truck in neutral. If the wheel turns freely with the driveshaft, then you do not have limited slip, or if you do, it's really wore out. If it's stiff to turn, then you have limited slip.
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Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
Originally Posted by Franklin2
Jack one rear wheel off the ground, and try to turn it with the truck in neutral. If the wheel turns freely with the driveshaft, then you do not have limited slip, or if you do, it's really wore out. If it's stiff to turn, then you have limited slip.
