The Diesel Stop banner

1 - 9 of 9 Posts

·
Registered
Joined
·
3 Posts
Discussion Starter #1
2002 Ford E350 Powerstroke, Quigley 4x4 conversion, Sportsmobile camper conversion

I was coming down a long steep fire road in Big Sur this weekend and my front brakes started smoking. After pulling over and letting them cool down, I put it into 1st gear and 4-low. In my jeep, this will let me creep down anything without touching the brakes. I was expecting the same in the automatic, but I wasn’t getting any help and still had to use the brakes.

With the 4x4 and caper conversions, plus camping gear this is a heavy vehicle. We made it down o.k. but I’d like to get things figured out before we hit this camp spot again. Is there a trick to using the engine to control downhill speed? Do I need to take it out of overdrive first?

Thanks for pointing me in the right direction. I did a quick search but nothing was jumping out at me...

-Mark
 

·
Registered
Joined
·
499 Posts
2002 Ford E350 Powerstroke, Quigley 4x4 conversion, Sportsmobile camper conversion



I was coming down a long steep fire road in Big Sur this weekend and my front brakes started smoking. After pulling over and letting them cool down, I put it into 1st gear and 4-low. In my jeep, this will let me creep down anything without touching the brakes. I was expecting the same in the automatic, but I wasn’t getting any help and still had to use the brakes.



With the 4x4 and caper conversions, plus camping gear this is a heavy vehicle. We made it down o.k. but I’d like to get things figured out before we hit this camp spot again. Is there a trick to using the engine to control downhill speed? Do I need to take it out of overdrive first?



Thanks for pointing me in the right direction. I did a quick search but nothing was jumping out at me...



-Mark


Hi mark banks power make a exhaust brake you could install. Helped a friend put one in his truck he said it was night and day difference and loved the help it gave him. Depending on the speed your doing you need to put the trans on the right gear. In my 7.3 f250 with it going 65 I can hit the over drive button off and feel the truck hold back and then at 45 I can go to second and then about 20 or so hit first and really slow down doing engine braking. That’s how I use mine. I also have drilled and slowed rotor and heavy duty pads on the front. If you going to 4 low did not help like you said it did not were you positive it was in 4-low. I ask cause my electric shift on mine sometimes does not go in. Not sure how much your rig weighs but may have been to much to hold back.


Sent from my iPhone using Tapatalk
 

·
Premium Member
Joined
·
14,446 Posts
I think you got less braking than you expected because your torque converter wasn't locked up when you put it in first gear. There is a "mod" that allows you to lock your torque converter with a push button switch, but you could also get a tune that does the same and more. For example, Jody's braking tune (DP-tuner) locks the torque converter and closes the exhaust back pressure valve - turning the truck into one big exhaust brake.
 

·
Registered
Joined
·
5,290 Posts
Diesels have less engine braking, WAY less, that gas engines as there is no throttle to restrict intake air and make the engine work. I drove several 7.3s and pulled several horse trailers and even tractors on trailers and thought it was all good. Then one day in my 2000 F350 Dually manual trans 4.10 geared truck I went down a downgrade on US 160 eat of Alamosa CO towing three horses in living quarter horse trailer (about 18K pounds) and NOTHING. Brakes got REAL hot. I thought I was going to lose all brakes as I was pushing it way down and all I got was shudder. Downshift only made engine go faster and did nothing to slow me. The grade diminished and I got slowed and stopped. I had thought that truck had good engine braking until I got a few MPH faster with a few more pounds and a little steeper grade. I did get a kit that let me close exhaust damper and it did WAY better. Autos need to TC lock system as RT said to get the full benefit of exh brake. I think you found that grade with that load and surpassed the engine braking capability.
 

·
Registered
Joined
·
3 Posts
Discussion Starter #5
Hi mark banks power make a exhaust brake you could install.


Sent from my iPhone using Tapatalk
What's involved with the install for the Banks exhaust brake? Do you remember how long it took you to install it? If I wind up having something installed I'd have to have someone else do the work, trying to gauge labor costs...

Thanks for the input!

-Mark...
 

·
Registered
Joined
·
3 Posts
Discussion Starter #6
There is a "mod" that allows you to lock your torque converter with a push button switch, but you could also get a tune that does the same and more. For example, Jody's braking tune (DP-tuner) locks the torque converter and closes the exhaust back pressure valve - turning the truck into one big exhaust brake.
I've heard there are different tunes you can get that increase performance in different areas. Is a tune just a program you feed into the vehicles computer? Is there any hardware that you'd need to interface? Can you pick a different tune for daily driving vs. road trip vs. long steep incline for a relatively short stretch; or does a tune just recalibrate the overall performance you get out of the vehicle?

Thanks for all the input, definitely getting a better feel for things based on the feedback I'm getting!

-Mark...
 

·
Registered
Joined
·
499 Posts
What's involved with the install for the Banks exhaust brake? Do you remember how long it took you to install it? If I wind up having something installed I'd have to have someone else do the work, trying to gauge labor costs...



Thanks for the input!



-Mark...


We switch it from one truck to his so everything was a swap. But two of us it took 4hours start to finish to get it swapped.


Sent from my iPhone using Tapatalk
 

·
Super Moderator
Joined
·
11,632 Posts
I think you got less braking than you expected because your torque converter wasn't locked up when you put it in first gear.
I disagree. While I was at Ford we measured the available engine braking with and without the torque converter locked. At any given RPM there was only 10% more engine braking available with the converter locked. That's not the problem. The problem is that the diesel engine has very little engine braking without an added engine or exhaust brake.
 

·
Premium Member
Joined
·
14,446 Posts
1 - 9 of 9 Posts
Top