Notices
1999 - 2003 7.3L Power Stroke Diesel  
Sponsored by:
Sponsored by: DP Tuner

Quick Transmission/transfer case question

Thread Tools
 
Search this Thread
 
Old Dec 13, 2010 | 05:57 AM
  #1  
bobbyrjw's Avatar
bobbyrjw
Thread Starter
|
Tuned
20 Year Member
Photogenic
Photoriffic
Shutterbug
Joined: Jan 2004
Posts: 419
Likes: 1
From: Jamestown, TN
Club FTE Silver Member

Quick Transmission/transfer case question

My new HD OEM reman tranny requires Mercon V.

My transfer case uses Mercon III.

There is a gasket between the two when you split them.

Do they "exchange" fluid?

I don't want the Mercon III from the transfer case to get into the Mercon V in the transmission.
 
Reply
Old Dec 13, 2010 | 07:00 AM
  #2  
Ponyboychris's Avatar
Ponyboychris
Lead Driver
15 Year Member
Joined: Jan 2007
Posts: 6,708
Likes: 5
From: Kiowa CO
Club FTE Silver Member

No, the transfer case and the tranny do not exchange fluids. They are independent of each other.
 
Reply
Old Dec 13, 2010 | 09:50 AM
  #3  
szotty's Avatar
szotty
Senior User
Joined: Jul 2009
Posts: 336
Likes: 0
yeah there two seprate things but make sure you dont put the mercon v in the transfer case cant use it in there i was told when i just changed my tranny to oem hd one
 
Reply
Old Dec 14, 2010 | 05:47 AM
  #4  
bobbyrjw's Avatar
bobbyrjw
Thread Starter
|
Tuned
20 Year Member
Photogenic
Photoriffic
Shutterbug
Joined: Jan 2004
Posts: 419
Likes: 1
From: Jamestown, TN
Club FTE Silver Member

Thanks for the info. I didn't think that it did, but I wanted to get confirmation.
 
Reply
Old Dec 14, 2010 | 08:29 AM
  #5  
miller_feed's Avatar
miller_feed
Hook it, I'll pull it.
Joined: May 2007
Posts: 15,037
Likes: 4
From: Grand Lake, La.
Club FTE Silver Member

Originally Posted by bobbyrjw
My new HD OEM reman tranny requires Mercon V.

My transfer case uses Mercon III.

There is a gasket between the two when you split them.

Do they "exchange" fluid?

I don't want the Mercon III from the transfer case to get into the Mercon V in the transmission.
There was never a Mercon III, only Mercon, and Mercon V. You can use Mercon V in the transfer case and the trans.
 
Reply
Old Dec 14, 2010 | 09:42 AM
  #6  
DieselCamper01's Avatar
DieselCamper01
Fleet Owner
15 Year Member
Photogenic
Photoriffic
Shutterbug
Joined: Mar 2007
Posts: 28,312
Likes: 6
From: BLT, MN
I used Mercon V in mine with no issues...
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Skauber
1997 - 2006 Expedition & Navigator
18
Apr 2, 2017 07:45 AM
Firefighter 1406
1999 - 2016 Super Duty
15
Oct 20, 2016 02:50 PM
pony
1999 - 2016 Super Duty
10
Mar 27, 2014 10:07 PM
AmmoDawg
1997 - 2006 Expedition & Navigator
2
Jan 8, 2013 09:26 AM
aurgathor
Oil & Lubrication
7
Jan 16, 2005 12:50 PM




All times are GMT -5. The time now is 06:58 PM.

story-0
10 Ways Ford is LOSING to the Competition

Slideshow: 10 ways Ford is losing to the competition

By Joe Kucinski | 2026-06-15 09:52:01


VIEW MORE
story-1
Top 6 Best Deals Available on New Fords & Lincolns Right Now

Some great targets in today's expensive world.

By Brett Foote | 2026-06-15 09:35:19


VIEW MORE
story-2
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level

Slideshow: The VelociRaptor Expedition gains a lift, upgraded suspension, Brembo brakes, and trail-ready equipment while retaining the stock 440-horsepower EcoBoost V6.

By Verdad Gallardo | 2026-06-12 11:01:55


VIEW MORE
story-3
Top 10 Fords at 2026 Carlisle Ford Nationals

Slideshow: Top 10 Fords at 2026 Ford Nationals

By Joe Kucinski | 2026-06-09 11:10:08


VIEW MORE
story-4
3 Best / 3 Worst Parts of Modern Ford Ownership

Based on years of owning multiple modern Ford products.

By Brett Foote | 2026-06-09 10:53:36


VIEW MORE
story-5
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches

SPONSORED: From muddy boots to rain-soaked cargo, these upgrades address some of the most common frustrations Ford truck owners face every day.

By Pouria Savadkouei | 2026-06-08 18:50:34


VIEW MORE
story-6
Every 2026 Ford Engine Explained

Here's everything you need to know about every Ford engine available for the 2026 model year.

By Brett Foote | 2026-06-05 12:58:01


VIEW MORE
story-7
10 Ugly Ford Trucks That We Still Kinda Love

Slideshow: 10 ugly Ford trucks that we still kinda love.

By Joe Kucinski | 2026-06-03 09:51:16


VIEW MORE
story-8
10 Things Every Truck Owner NEEDS (2026 Edition)

Slideshow: the best gifts for dads & grads

By Michael S. Palmer | 2026-06-03 15:43:58


VIEW MORE
story-9
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath

Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.

By Verdad Gallardo | 2026-06-03 11:38:36


VIEW MORE