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Discussion Starter #1
I have owned my 2004 F250 4WD since new. I tow a 5th wheel and a bumper hanger 18 ft 5,000 lb race trailer.
While in Haul/Tow, the transmission has always down shifted under breaking. When I brake, the transmission would downshift. When I applied more pedal pressure the transmission would downshift even more. The transmission would stay in that lower gear until I accelerated again.

At 71,000 miles the original transmission failed. A new Ford rebuilt transmission was installed by a Ford dealer which has a 3 year warranty. The rebuilt transmission worked identically as the original transmission, including the compression braking. After 1,000 miles that transmission failed. I wouldn't have power to go uphill, it would go into neutral unexpectedly then back into drive, the tow/haul light would blink on and off, the transmission temperature went up to high and the check engine light came on.
I took it to my local Ford dealership (Future Ford, Concord, CA) for repair. They did the repair, under warranty. Which consisted mainly of replacing clutch packs. they said the transmission fluid was burned.
When I got the truck back, the transmission seemed to work ok, but the downshifting under braking in tow/haul was gone.
I have taken it back to the dealer two times. Of course they told me the transmission is working properly and this transmission never had compression breaking. They even said their transmission mechanic has a 2004 F250 and his doesn't have compression braking while in tow/haul. Either I have had smoke blown up my *** or his transmission isn't working properly.

Yesterday I drove my truck with a 5,000 pound trailer for the first time since the transmission repair. Coming off the freeway and on the brakes, there was no compression breaking. In fact, it took significant amount of additional distance with only the brakes than with both brakes and compression braking.
I would consider the compression breaking a safety factor as it significantly reduces braking distance to slow the truck under control than with only the truck and trailer brakes. My niece is getting this truck & because she will be hauling horses with it, I want the truck to be as safe as possible for her.

According to the Ford information for the 5R110W Tow/Haul function:
"Another feature of the 5R110W TorqueShift transmission is the switch for the tow//haul function, activated by a switch on the shift lever. The purpose of this switch is to make it more energy-efficient to tow heavy loads.
When you activate this switch, it turns on the torque converter lock while in lower gears. This is an important safety feature when going down long hills to control the vehicle's speed. When the gyroscope detects your truck moving down a decline, it automatically downshifts the engine to reduce speed and provides extra ability to brake."

Question,
How can get the dealer to repair the transmission to get the compression braking back when they refuse to acknowledge that it ever had compression braking?

Mark, I need your help to convince them.
 

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Mark Kovalaski over at the Powerstroke Nation ( sister site to this one ) can tell you exactly what the 5r does in TH since he was part of the team that wrote the software

I am surprised they did clutches on a OEM Alma Rebuilt unit and did not just replace the unit

something is definitely up with the strategy or actual unit

and why did it smoke the original friction disc ?
 

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PSMark K states the converter does not lock or unlock any differently in TH than in regular mode so not sure where your info came from ?

from the nation

Tow/haul does not keep the torque converter locked any more than normal mode. Tow/haul will make the upshifts at higher speeds and will automatically downshift the transmission to help with engine braking, but it does that with the torque converter unlocked.

Tow/haul also does NOT increase line pressure.
 

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Take it to another dealer to evaluate.
It should be shifting down with added brake pressure as you described while in tow/haul mode.

Sent from my SM-G965U using Tapatalk
 

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In tow-haul mode, the transmission will downshift when you tap on brake pedal. Subsequent taps will downshift again so long as a safe engine rpm will result.

Living in California, we travel up and down mountains all of the time. Using this downshift feature is a must! Last year our tranny had an issue in the middle of a cross country trip. Tow-haul didn't work and light was flashing. Needless to say, I pulled a rookie move descending the Grapevine....kept on the bakes the whole way down to the valley. I smelled burned brakes...ruined the brakes on both the fifth wheel and truck. New brakes and drums on fiver, rotors, pads, and calipers on truck. When I removed calipers on truck, found that pistons got so hot that they crystalized and started to desintegrate.

I would have saved a lot of $$$ and trouble if I had just manually downshifted...senior learning moment...won't repeat.

Edit: forgot to mention that transmission needed to be rebuilt. Had them use heavy duty parts...works great now.
 

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2003 trucks have it. There is a hill that I drive down (unloaded) on the way too beach that my transmission will down shift on and “chirp” my rear tires if I am not careful. Your current dealer is F O S...
BTL
 

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Discussion Starter #8
Tow/Haul

Thanks for all your help. I finally got the dealership to acknowledge that my truck should have compression braking and they will take care of it.
They will call Ford this week to get authorization for the repairs.

BIG THANKS!!!!
 

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The dealership agreed to do a road test with computer and special software provided for Ford. They thought the problem may be in the Coast Clutch.

My conversation yesterday with your tech didn't address the problem even after a 1/4 tank of diesel to accomplish the test.
All the dealership would say is the truck has compression braking (they were non committal about if he tested it as described below). Which I asked them to do.

The following is the way the 5R110W should work in haul/tow mode. All three transmissions have worked this way. The haul/tow mode stopped working after the dealership repaired?????? it on 7 Nov 2019:

Going down a grade (loaded or unloaded) while in drive and haul/tow mode.

1. Step on brake (it down shifts into a lower gear).
Take your foot off the brake
It stays in that lower gear.

2. Step on the brake again (It down shifts into an additional lower gear).
Take your foot off the brake
It stays in that 2nd lower gear.

3. Step on the brake again (It down shifts into an additional lower gear).
Take your foot off the brake
It stays in that 3rd lower gear.

All the time the brakes are not being used, only compression braking.

Accelerate to get the transmission to shift up into drive.

I talked to the Ford Powertrain Assistance Center. They gave me a case number and suggested that the vehicle be taken to a different dealer for repair.

Any other suggestions? I sure miss the compression braking.
 

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The dealership agreed to do a road test with computer and special software provided for Ford. They thought the problem may be in the Coast Clutch.

My conversation yesterday with your tech didn't address the problem even after a 1/4 tank of diesel to accomplish the test.
All the dealership would say is the truck has compression braking (they were non committal about if he tested it as described below). Which I asked them to do.

The following is the way the 5R110W should work in haul/tow mode. All three transmissions have worked this way. The haul/tow mode stopped working after the dealership repaired?????? it on 7 Nov 2019:

Going down a grade (loaded or unloaded) while in drive and haul/tow mode.

1. Step on brake (it down shifts into a lower gear).
Take your foot off the brake
It stays in that lower gear.

2. Step on the brake again (It down shifts into an additional lower gear).
Take your foot off the brake
It stays in that 2nd lower gear.

3. Step on the brake again (It down shifts into an additional lower gear).
Take your foot off the brake
It stays in that 3rd lower gear.

All the time the brakes are not being used, only compression braking.

Accelerate to get the transmission to shift up into drive.

I talked to the Ford Powertrain Assistance Center. They gave me a case number and suggested that the vehicle be taken to a different dealer for repair.

Any other suggestions? I sure miss the compression braking.
That is exactly how mine worked before the transmission rebuild, and still the way it works after the rebuild.

Couldn't drive over mountain ranges without. Doing the I -5 Grapevine on Wednesday!
 

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Discussion Starter #11
Well Guys, finally success.
As the Ford Powertrain Customer Service suggested, took the truck to a Ford Dealer in Vacaville, CA.
They drove it and agreed to pull and inspect the transmission under warranty.
After pulling it apart and discussing the repair with Ford, it was decided to replace the transmission with a rebuilt from Ford.

Finally, thanks also with all your help, it will be fixed.

Not going back to that Ford dealer in Concord, CA again.
 

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Discussion Starter #12
Well Guys, finally success.
As the Ford Powertrain Customer Service suggested, took the truck to a Ford Dealer in Vacaville, CA.
They drove it and agreed to pull and inspect the transmission under warranty.
After pulling it apart and discussing the repair with Ford, it was decided to replace the transmission with a rebuilt from Ford.

Finally, thanks also with all your help, it will be fixed.

Not going back to that Ford dealer in Concord, CA again.
 
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