1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

What fluids do the older transfer cases use?

Thread Tools
 
Search this Thread
 
  #1  
Old 04-18-2006 | 12:41 PM
Kwikkordead's Avatar
Kwikkordead
Thread Starter
|
Fleet Owner
Joined: Jun 2004
Posts: 24,756
Likes: 933
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.
 
  #2  
Old 04-18-2006 | 05:00 PM
Franklin2's Avatar
Franklin2
Moderator
Joined: Jan 2001
Posts: 54,658
Likes: 1,990
From: Virginia
Club FTE Gold Member
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.
 
  #3  
Old 04-18-2006 | 08:33 PM
puck1263's Avatar
puck1263
Senior User
Joined: Oct 2005
Posts: 342
Likes: 0
mercon for the transfer case and transmission. hypoint for the rear..with lube if it has limited slip. gear oil (80W-90) for front differential.
 
  #4  
Old 04-19-2006 | 05:39 AM
Kwikkordead's Avatar
Kwikkordead
Thread Starter
|
Fleet Owner
Joined: Jun 2004
Posts: 24,756
Likes: 933
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.
 
  #5  
Old 04-19-2006 | 08:12 PM
Franklin2's Avatar
Franklin2
Moderator
Joined: Jan 2001
Posts: 54,658
Likes: 1,990
From: Virginia
Club FTE Gold Member
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.
 
  #6  
Old 04-20-2006 | 09:05 AM
Kwikkordead's Avatar
Kwikkordead
Thread Starter
|
Fleet Owner
Joined: Jun 2004
Posts: 24,756
Likes: 933
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.
Good idea, thanks.
 




All times are GMT -5. The time now is 05:53 PM.