Notices
1994.5 - 1997 7.3L Power Stroke Diesel  

Best E4OD fluid temps?

Thread Tools
 
Search this Thread
 
Old Jul 13, 2018 | 10:14 AM
  #1  
510galaxy's Avatar
510galaxy
Thread Starter
|
Cross-Country
Joined: Feb 2014
Posts: 76
Likes: 3
From: SoCal
Best E4OD fluid temps?

I'm installing a rebuilt E4OD with billet converter into my 1997 F-250 7.3 and I purchased a 6.0 ( Mishimoto ) trans cooler to pair with it. Now I understand this cooler may be overkill for my setup, so that's why I plan to install an external thermostat to regulate the trans fluid temps.
I'm looking at thermostats that are available in stabilized temps of 145, 165, 185, and 215F degrees. I'm leaning toward the 185F, but can anyone tell me what fluid temperature range the E4OD was designed to operate? ( Mark K? )

And let me say that removing this transmission at home on the ground, alone, was the BIGGEST PAIN IN THE *** I have ever encountered working on anything. It surely seems the 7.3 PS was NEVER supposed to live in the OBS chassis ( one that was designed in the 1970's ). I decided not to cut up my downpipe in the truck, that I could pull it out once the trans was out - WRONG! It's still hanging there!!! -I'll drop it when I change my up-pipes and install my coated 3" DP.....
 
Reply
Old Jul 13, 2018 | 11:36 AM
  #2  
oldbird1965's Avatar
oldbird1965
Fleet Owner
20 Year Member
Liked
Loved
Community Favorite
Joined: Aug 2004
Posts: 20,418
Likes: 197
From: AZ
Club FTE Silver Member

A good syn oil I've read up to 250*° but I believe 215*° would be about right. Years ago I put a true-cool trans cooler in with the thermostat and had over heating problems. I finally threw it out. As far as the down pipe, use a sawzall to cut it in half. Don't use a torch, one guy burned his truck up doing that!
 
Reply
Old Jul 13, 2018 | 09:59 PM
  #3  
Mark Kovalsky's Avatar
Mark Kovalsky
Frmr Ford Trans Engr
25 Year Member
Liked
Community Favorite
Top Answer: 3
Joined: Aug 1999
Posts: 24,704
Likes: 2,626
From: SE Florida
The 185F thermostat is the best choice. That will keep the trans temp around 160-170F, which is ideal.
 
Reply
Old Jul 15, 2018 | 12:50 AM
  #4  
510galaxy's Avatar
510galaxy
Thread Starter
|
Cross-Country
Joined: Feb 2014
Posts: 76
Likes: 3
From: SoCal
Thanks guys!
 
Reply
Old Jul 15, 2018 | 07:36 AM
  #5  
oldbird1965's Avatar
oldbird1965
Fleet Owner
20 Year Member
Liked
Loved
Community Favorite
Joined: Aug 2004
Posts: 20,418
Likes: 197
From: AZ
Club FTE Silver Member

I should have clarified, 215° when I'm towing that 5th wheel in my signature.
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
alf15092
1987 - 1996 F150 & Larger F-Series Trucks
4
Jan 17, 2016 09:35 PM
rcnease
1987 - 1996 F150 & Larger F-Series Trucks
5
Feb 17, 2014 09:37 AM
patrickkomar
1987 - 1996 F150 & Larger F-Series Trucks
25
Mar 5, 2010 12:37 PM
BrokenBit
1999 - 2003 7.3L Power Stroke Diesel
12
Jun 8, 2008 11:36 PM
Schmavic
Offroad & 4x4
22
Jun 5, 2004 11:52 PM




All times are GMT -5. The time now is 05:49 AM.

story-0
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

By Joe Kucinski | 2026-05-18 19:34:33


VIEW MORE
story-1
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

And it might be even better than that.

By Brett Foote | 2026-05-18 19:26:42


VIEW MORE
story-2
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

Slideshow: Does lowering an F-150 Lobo RUIN the ride quality?

By Michael S. Palmer | 2026-05-18 19:20:37


VIEW MORE
story-3
Ford's 2001 Explorer Sportsman Concept Looks For a New Home

Slideshow: Ford's bizarre fishing-themed Explorer concept has resurfaced after spending decades largely forgotten.

By Verdad Gallardo | 2026-05-12 18:07:46


VIEW MORE
story-4
10 Best Ford Truck Engines We Miss the Most!

Slideshow: The 10 best Ford truck engines we miss the most.

By Joe Kucinski | 2026-05-12 13:09:47


VIEW MORE
story-5
2026 Shelby F-150 Off-Road: Better Than a Raptor R?

Slideshow: first look at the 810 hp 2026 Shelby F-150 Off-Road!

By Brett Foote | 2026-05-12 12:50:07


VIEW MORE
story-6
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!

Slideshow: Everything You Need to Know about the 2027 Super Duty Carhartt Package!

By Michael S. Palmer | 2026-05-07 17:51:06


VIEW MORE
story-7
10 Most Surprising 2026 Ford Truck Features!

Slideshow: 10 most surprising Ford truck options/features in 2026.

By Joe Kucinski | 2026-05-05 11:17:22


VIEW MORE
story-8
Top 10 Ford Trucks Coming to Mecum Indy 2026

Slideshow: Here are the top 10 Fords coming to Mecum Indy 2026.

By Brett Foote | 2026-05-04 13:49:49


VIEW MORE
story-9
5 Best / 5 Worst Ford Truck Wheels of All Time

Slideshow: The 5 best and 5 worst Ford truck wheels of all time

By Joe Kucinski | 2026-04-29 16:49:01


VIEW MORE