TOWING - OD or OD Off? - Diesel Forum -
Towing and Hauling Towing and hauling with Ford diesel trucks and vans.

LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old 08-26-2010, 09:36 PM Thread Starter
musstag's Avatar
Join Date: Nov 2005
Location: Fairhope, Alabama
Posts: 92
Feedback Score: 0 reviews
TOWING - OD or OD Off?

I HAVE A 95 F350 7.3 turbo A/T Crew Dually Diesel. Many plp have always said, "Oh you got to tow with OD off". But I have to run about 3000 RPM's to go 60 mph, So I don't, I tow with OD ON. A few days ago I found on page 284 of my F series Ford Book that came with the Truck, IT SEZ to TOW in OD if u have a computer controlled trans. E4OD or 4R7OW. If u are decending a steep hill to operate in Drive (?). I gues that menas outa OD. Is that what yall do, whata yall think.

'95 Crew Diesel Dually 7.3 automatic (147k 12/02/05) 199k 11/16/11, no cat, bigger DP I was told. "Don't put sides on your Shop, or the Ole Lady will want to store Furniture in it"
musstag is offline  
Sponsored Links
post #2 of 4 (permalink) Old 08-26-2010, 09:55 PM
Senior Member
chuckster57's Avatar
Join Date: Apr 2008
Location: Central Valley, Ca.
Posts: 16,382
Feedback Score: 1 reviews
As long as the transmission isn't "hunting" meaning going in and out of O/D, then leave it in OD. I know I have an IDI not a PSD, but the tranny is computer controlled in both. I asked the same question when I first got my truck and I was assured by many members here and the tranny GURU Mark Kovalsky, that it is fine to tow in OD.

1994 F-350 7.3 IDI Turbo, crew cab, E4OD,4:10 L/S, LB, Dually Photos
ATS Turbo upgrades: 3" DP with 3" exhaust Magnaflow XL muffler: Pictures Here
2012 Copper Canyon 273 FWRET w/2 slides, Air Lift 5000 bags
Pillar pod: Autometer C2 Series gauges: pyro,trans, boost, water, oil pressure
Hypermax Cowl induction, K&N air filter, flex-a-lite 26K trans cooler with fan,Tekonsha prodigy
Train Horns: Pictures here

PM please not visitor message
chuckster57 is offline  
post #3 of 4 (permalink) Old 08-27-2010, 06:03 AM
Lifetime Supporting Member
Mark Kovalsky's Avatar
Join Date: May 1999
Location: SE Florida, USA
Posts: 10,432
Feedback Score: 0 reviews
The transmission was designed to tow in OD. The manual tells you that you should. You can't keep up with traffic towing in D. People who know nothing about transmissions tell you to not tow in OD.

Seems pretty overwhelming to me.

Former Automatic Transmission Engineer 1988-2007

“The good thing about science is that it's true whether or not you believe in it.” ― Neil deGrasse Tyson
Mark Kovalsky is online now  
post #4 of 4 (permalink) Old 09-01-2010, 11:59 AM
Join Date: Apr 2009
Posts: 39
Feedback Score: 0 reviews
As above, I tow in OD until the transmission starts "hunting" on a hill, then I hit the button to lock out OD. We have some significant hills that I pull, the worst is an 8% 4-mile long grade. I hit it as hard as I can legally drive, then lock out OD when the transmission downshifts.

When speed drops, and it automatically downshifts to 2nd, I pull the lever down to second also, back off the throttle, and ride to the top.

Downhill on that section, I hit the top of the mountain as slow as possible, pull it down into 2nd, and use the brakes to keep my speed below about 45 mph. I'll let it run up to 45 mph, then brake hard to drop it to around 40 mph, let the brakes cool as speed picks up, and repeat.

King George
2007 F-350 XLT 6.0L
Minor upgrades include: Husky Liners, B&W Gooseneck/Companion hitches, and a Glock G31.
The Highlander is offline  
Sponsored Links

  Diesel Forum - > Ford Diesels > Towing and Hauling
Gear in this thread - Powered by O'Reilly Auto Parts

Quick Reply

Register Now

In order to be able to post messages on the Diesel Forum - forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome