You have to have 20 or 30 posts in order to have a signature and if you are posting from a phone, they won't show up anyway.

 

It is probably 2-4 miles long. I'm not 100% sure. It seems longer than it probably is because of how slow I have to go.

 

Didn't catch the 10MPH part until now, definitely would consider 4LO for that. If you have manual hubs, you don't need to engage them if you don't need 4WD. Since the grade is dirt, 4WD won't hurt anything either.

And check the fan clutch, make sure the cooling fan is working.

Turning off the A/C might also help a bit... Did you happen to notice the engine coolant and oil temps on the previous hauls?

 

I don't recall those temperatures but nothing stood out except for the transmission temp. Don't know much about the fan clutch operation, but I see the fan spinning. Most of the time in heavy tows I turn off the AC (pisses the family off, but gotta do it). I'm going to hose down all the coolers just in case, even though I don't see anything obvious.

 

Thanks for the video. That is interesting. So this would put it in lower gear than say switching the transmission selector to 1? Would you turn this switch on, and run the transmission selector in 1 or regular Drive?

So theoretically this would make the transmission work easier and cause less heat?

 

Thanks for the info. Guess I'm going to have to start posting more. Noticed I couldn't send PM's out yet either.

 

But, they all had Transmission Coolers. Use a 1/4" NTPM and a length of Tubing, Flair End and 1/4 NPTF and route to radiator. From Radiator to Cooler same way, and finally Cooler to original Connection. About $20 and a much better set-up for cooling.

 

I skipped past all other posts after seeing someone suggest 4x4hi which will not help at all. Put it in 4 low, probably 2nd gear. That'll keep the revs up and the slippage on the torque converter low. It might actually lock the converter making for 0 slip, never paid attention to the TCC strategy in low range. The torque converter is where most of the heat is made, keeping the 'slippage' low is key. High RPM at low throttle in a low gear will give little slip and high fan speed to pull air across the cooler. Low RPM in a higher gear will give more slip and less fan.

 

That will appear after a new user has 5 posts and 10 days registered. You're past the 5 posts so, since you registered on the 21'st, you should see the sig option on July 1. I have no clue how precise that clock is, so it may occur on July 2.

Stewart

 

Hey Sous I know you shared it in the original thread which I can't find but where did you get the switch?

 

Post #6 should provide the answer you are looking for.

https://www.ford-trucks.com/forums/1...-to-video.html

Great people to deal with from my experience.

 

I have a manual ZF6 truck, so I would not be the best person to answer this question. Although, I would say once in 4WD LOW then just put the truck back into Drive and keep it slow and steady going up the grade.

 

So the equivalent to your mod would be disconnecting that ESOF connector that you tapped into the ground wire, and then turn the selector switch to 4x4 low position? This would engage the transfer case and go in low, but the hubs won't be locked to turn the front tires. Is that correct? I don't have the time to do your mod before my next trip. So wanted to be sure on the equivalent in the meantime.

 

People talk about torque converter lockup and torque converter slipping (slipping causing added heat). Is this something you can feel? How do you know when your torque converter is locked up? How do you know if your torque converter is slipping?

The only time I ever felt anything weird with my transmission when it was already too late and overheated and puked out the fluid on my 2nd trip, and would not move. Other than that time, I haven't felt it do anything weird (just getting hot). So not sure how I would know if it was slipping causing this extra heat.

 

That is correct. This is what I used to do before I completed the mod. The ZF6 has a very high reverse gear, so much so that the engineers must have been laughing at us when they designed it.

If I have ANYTHING hooked to the back of the truck, I use 2WD LO to back up. If I just have the truck and nothing on the back, then normal reverse works well enough.