transfer case fluid

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Jan 29, 2017 | 09:20 AM

hotrodfeguy

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More Turbo

Joined: Mar 2003

Posts: 578

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From: Green Bay Wi

transfer case fluid

How often do you all change your Transfer case fluid? Also what weight do you guys use or does every one stick with the ATF/Merc5 stuff?

Jan 29, 2017 | 09:36 AM

Sous

FTE Leadership Emeritus

Joined: May 2014

Posts: 27,353

Likes: 5,946

From: Lake Hartwell, GA

I changed mine when I bought the truck 2.5 years ago with Amasoil Synthetic ATF. Some have moved away from the ATF and gone to a specific transfer case fluid recommended by Ford.

I don't plan to change it very often, perhaps during transmission fluid changes, which I have a manual so about every 25K miles or so based on use.

Jan 29, 2017 | 10:23 AM

mueckster

Lead Driver

Joined: Jun 2003

Posts: 8,298

Likes: 25

From: Damon (South East Texas)

I started using Mobil 1 Synthetic ATF in my transfer case when rebuilding my "mechanical diode" 4R100 about 9 years ago. It was changed out at each trans service, there after (~ 50k miles). I also serviced my ESOF locking hubs at that time. ~ 150k miles using the Mobil 1 and no issues.

Jan 29, 2017 | 11:00 AM

TerranE

Mountain Pass

Joined: Nov 2016

Posts: 153

Likes: 2

From: Front Range

Due to the reported changes in ATF formulations, I used the recommended Ford transfer case fluid.
I figure that first it only takes a couple of quarts and secondly it only takes a couple minutes to change. Any warm fuzzy feeling I get from using synthetics can be regained by changing before the recommended interval. Any money saved by using a cheaper blend of ATF is minimal.