Towing with E4OD

[m67tang]

I have a new trailer to haul firewood. It will carry about 4500# plus the trailer weight brings the total towing load weight to about 6200#. Do I need to lock out the OD while on 60 mph state highways to save my tranny?

The tranny has a large cooler, synthetic Amsoil fluid and about 20K on rebuild. I just don't want to burn up my transmission towing. I'm not familiar to towing with an auto OD tranny.

 

[david85]

The only reasons I think you should lock out overdrive is

1; if you are not getting enough engine RPM to comfortably hold speed, or

2; if the transmission hunts between 3rd and overdrive

If you have 3.55 gears, the truck should be pretty ideal in 3rd if your speed is 60 MPH. If you have 4.10, the RPM/powerband will be much better in overdrive.

 

[m67tang]

the truck has 4.10 gears

 

[david85]

Yeah just drive it

If its gonna blow, it will go weather you spare overdrive or not. Due to the internal architecture of the transmission, the overdrive section is the first internal part to receive torque no matter what gear you are in (including reverse) so it really doesn't make as much difference as many seem to think.

When E4ODs blow, its usually some other underlying problem that is responsible.

One thing to watch out for is pushing too hard in reverse near O MPH for more than a few minutes. They can overheat from that, but with 4.10 gears its not as likely to happen as with 3.55s (or 3.08s for that matter!)

 

[94f450sd]

keep it cool.

 

[RLDSL]

You are running high end fluid with a large cooler, on fairly flat ground. That kind of weight with that kind of speed and rear end, you will most likely be fine in OD just so long as it's not boging down or hunting. Remember, you will get better fuel mileage with a heavy load if the engine is revved up a but to where it isn't having to strain and you aren't having to floor it. If you have to stand on it to maintain od , then, just lock it out and ease off the pedal and save some fuel and your tranny, but if it's sailing along in OD without having to work it, then you are fine.

 

[Compu Doc]

Also to add to the other comments, install a tranny temp gauge.

 

[OLDBULL8]

With 4:10 gears you should be running 1800-1900 RPM at 60 MPH , thats at the low power/torque band. You should be just fine running in OD. That aux. cooler will do the job cooling.

In Lawrenceburg, just go over to the Hollywood if you need some extra cash.

 

[robmoore11]

With 4:10 gears you should be running 1800-1900 RPM at 60 MPH , thats at the low power/torque band. You should be just fine running in OD. That aux. cooler will do the job cooling.

In Lawrenceburg, just go over to the Hollywood if you need some extra cash.

My 1990 idi f250 has 3.55 and I run at 1800 rpm at 60 mph..

 

['94IDITurbo7.3]

With 4:10 gears you should be running 1800-1900 RPM at 60 MPH , thats at the low power/torque band.

The truck in my sig will run those rpm's unloaded @ 50-55mph. @ 60mph it runs ~2000-2100.
Is that normal?

 

[86truckpull]

I did truck pulls with my e4od it's a great tranny with one problem the torque converters burn up I would put a good aftermarkt one in here like the one from monster transmision

 

[h2odrx]

With 4:10 gears you should be running 1800-1900 RPM at 60 MPH , thats at the low power/torque band. You should be just fine running in OD. That aux. cooler will do the job cooling.

In Lawrenceburg, just go over to the Hollywood if you need some extra cash.

I've got 4.10 and mine runs 55 @ 1900, 60 @ 2000?

 

[OLDBULL8]

Geez, my tach must be off.

 

[OnDaRoad]

As someone who tows everyday ...

I tow everyday with my 1991 F350 w/ an E$OD
all over the lower 48 states

My average trailer load I pull is 12,000 pounds

If you want your transmission to last

You need to always tow with the OD light on

Try to keep it at 55 m.p.h.

If you don't have a tranny temp gauge - install on
in the correct location (tell em' where to put it Bill)

Don't exceed 900 degrees on your pyrometer

Drop it down to 2nd & settle for 35 m.p.h when navigating
a relatively steep upgrade (5% or greater)

Watch your temp gauge - run the heater to dissipate heat
if necessary inthe summer when climbing the hills

Take car of your transmission & your truck - it will take care of you


Jim

Bill - a shot of Deva last week on an Allis G9 before I left for
California ....... you stay cool

You must be registered for see images

 

[robmoore11]

At 75 mph I am about 2000-2050 pretty much all diesels are the same trans wise. I've owned two dodges and 1 ford now. At 2000 rpm with 3.55 you should be doing around 120 km/h (75 mph). With 3.73 you should be around 105-110 km/h. And with 4.10 you should be around 100 km/h give or take (60 mph)