Question about 1992 Ford F350

1 Answer

Can you run a1992 ford f 350 diesel can i run tranmission in overdrive when pulling a large trailer

Posted by on

  • dstack51 Mar 13, 2011

    the diesel turns to many rpm when your going 65



1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Ford Master
  • 5,370 Answers

NO.Turn the overdrive off on truck when pulling with the OD OFF when hauling - it protects your transmission -If you run that way,then your transmission gets damaged.
"Overdrive" is just that... here's how it works: it makes the wheels turn more than one rotation for every rotation of the transmission/ engine. So basically when you're in overdrive your wheels are spinning faster than your engine, which takes stress off the engine in normal freeway driving when the accelerated mass of your car can maintain your speed and your engine doesn't need to work as hard. But if you are towing more weight, going uphill, etc., it actually makes your engine work HARDER because it has to catch up to the wheels to push that load. It's like this: imagine (and these are just arbitrary numbers) for every 1 rotation of your engine, your wheels are spinning twice. In normal freeway driving, the mass of your car at speed helps to push itself and the engine really only needs that single rotation to every double rotation of the wheels to maintain speed. But if you add weight, you are asking your vehicle to pull up to twice its mass at half engine power. This will make your vehicle sluggish and tear up your transmission, because it's trying to convert the engine's power to wheel power at a lower rate. Your engine will bog down and have to work twice as hard to maintain the same rate of speed.

When you turn overdrive off, it sounds/ looks like your engine is working "harder" but it's really just working normally. Towing is hard on your vehicle anyway, but its NOT doing any favors by keeping it in overdrive, its actually damaging the transmission.

Overdrive on causes more shifting of gears. When you drive your truck normally (OD on) and accelerate or go uphill you will notice the vehicle shifting gears. When towing, the weight of the trailer will cause this to happen more often. The frequent gear shifting when pulling weight is not good for the transmission.

OD is your highest transmission gear. It is called overdrive because the
gear ratios in the trasmission makes the output shaft of the
transmission turn turn faster that the engine. In most modern automatic
transmissions, OD is the 4th gear. 3rd gear is usually "direct drive",
meaning that the output shaft turns at the same rpm as the engine. In
lower gears (1st and 2nd) the gear ratio is such that the engine is
turning faster that the output shaft.
If you select OD off, you tell your transmission to forget about
shifting up to 4th. It will upshift up to 3rd only. Your engine will rev
faster for a given speed compared to OD (4th), your gas mileage will
suffer a bit, but you will have more power available since the engine
rpm is higher, wich is good when towing. Also the transmission is less
likely to hunt gears between 3rd and 4th wich could eventually damage it.
You transmission may or may not run cooler with OD off. That depends
largely if the torque conveter in the transmission locks or not in 3rd
gear.The reason you turn your OD off is that the OD is the biggest cog in the gear box there for it puts more strain on it when towing and is the easiest to damage over a long period of time---------
The owners manuals recomed turning OD off when towing.-----------------
This should help.Thanks.Helpmech.

Posted on Mar 13, 2011

  • raj somaiya Mar 13, 2011

    If the tire size is less then rpm will be more.If the tire size is big then rpm will ne less.
    65 mph is ~1900 rpm for with 3.73's.
    With 4:88 at 65mph and those tires you would be at 2403rpm
    With 5:33 at 65mph, 2625rpm

    With 4:33 at 65mph, 2132rpm
    With 4:10 at 65mph, 2019rpm
    This would be in OD.
    If the speed rpm is too much get the differential gears checked.------------- This should help.Thanks.Helpmech.



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

20007 ford f 350 turbo diesel trailer lights not working

Hello Marty Stolle,

Before I would get overly concerned with the VEHICLE...

I would first ENTERTAIN the thought...
are creative works of ART.

Use the FREE drawings & TSB (Tech Service Bulletins)
on the BBB Industries website at
BBB Industries Premium Alternators Starters Power Steering Products

To true-up the FUNCTIONALITY of your F350
(nice rig)...


Extend a simple BATTERY JUMPER CABLE...
to your "TRAILER" to verify whatever you have
going on there...

In MY PAST ... (borrowed: co-owned) rather than
commercial grade... "homemade" ...

Rather than tamper with the trailer... or my truck
I used the Factory connecter Conversion JUMPER
to use with that particular trailer...

Easy... Running lights & license... plus
Left & right turn signals...

Easy to trace trailer wires...
Bulbs must be pulled and circuits disconnected to
properly use a tone tracer...

$25 Example from AMAZON...
Extech TG20 Wire Tracer and Tone Generator Amazon com

Carnac the Magnificent

Aug 30, 2017 | Ford Cars & Trucks

1 Answer

2006 ford explorer tranmission price t0 rebuild 0r used one

A 2006 Ford Should not need rebuild, unless it was run completely out of fluid. What are your symptoms? Is it a manual or automatic? Do you pull a heavy trailer? Did you Change the trans. filter at 60,000 miles? Mr. Transmission has them on the shelf, but very expensive.

May 20, 2017 | Ford Cars & Trucks

1 Answer

Where are the trailer light fuses on a Ford F-350 6.7 diesel

they are the fuses for the rear end lights of the vehicle
if trailer lights don't work but the vehicle lights do , the problems is most likely in the connections for the vehicle or trailer

Oct 18, 2015 | Ford Cars & Trucks

1 Answer

Do i use overdrive when i pull my horse trailer

NEVER use OVERDRIVE when hauling a trailer, unless the trailer is EMPTY and you are on FLAT OPEN HIGHWAY!

Jul 22, 2014 | 2006 Ford F-150 SuperCab

1 Answer

05 f-250 super duty Pulling trailer uphill reved up shifting down, bogged out no throttle response wrench light on. Top of hill pull over restart wrench light out Problem repeats at next hill. ford...

It does have a towing package right? A button on the end of the gearshift that you push in when towing? It sounds like it is in too high of gear. Maybe trans fluid gets hot and turns on the light? If it dont have the towing package? Are you keeping it in overdrive? Shift it down manually and keep it in 3rd when hauling any kind of weight.
Not sure if this helps but I know peopl that have burnt their transmission out pulling trailers in O/D

Oct 15, 2011 | 2005 Ford F 350 Super Duty

1 Answer

I have a 95 f250 powerstroke diesel, automatic, since yesterday the transmission has been slipping between 3rd and overdrive. the problem started while hauling a fairly light horse trailer and the...

You should not use overdrive unless you are steadily going highway speeds. I had one of those and my ex liked to use cruise control on windy coastal roads. This caused it to shift back and forth from 3rd to overdrive constantly. So I disconnected the cruise control so he couldn't use it. Lol. I'm not suggesting this for you. You should keep overdrive off for now and have your transmission serviced. New filter & oil & flush the cooler. Make sure you ONLY USE THE RECOMMENDED FLUIDS!!!!!!!!!! See if that helps. Do not use overdrive pulling a trailer and going up a hill and do not use it if you are on windy roads where you are slowing down alot of times. Try letting off the gas for a second when you do want to engage the overdrive. Remember to always check your automatic tranny fluid with the engine running and fully warmed up.

Apr 01, 2017 | Ford F-250 Cars & Trucks

1 Answer


look in the driver door it will tell you i pull a gooseneck with 30000 on it all the time with no prolbem my wieght is 30000

Feb 15, 2010 | 1987 Ford F 350

1 Answer

Will not go into overdrive automatic

even as a f350 heavy duty diesel owner i pull a 33 foot trailer i never use my over drive ,its to hard on the tranny.your tranny will last longer, so DONT use overdrive

Aug 09, 2008 | 1987 Ford Ranger

Not finding what you are looking for?
1992 Ford F350 Logo

Related Topics:

83 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts


Level 3 Expert

76846 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22246 Answers


Level 3 Expert

5546 Answers

Are you a Ford Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides