Trans Decel for towing
Thread Starter
|
More Turbo
Joined: Jan 2010
Posts: 571
Likes: 8
Trans Decel for towing
So what is actually happening to the trans when there is a decel option I know DP had it in their tow tunes but seems nobody else has it in their tunes is it a bad thing for the trans? It was a nice option in the tow tunes when i had DPs tunes. Was going to ask some tuners about this option but not really sure what its actually called. Torque converter lock decel?
Cargo Master
Joined: Mar 2019
Posts: 2,907
Likes: 788
From: Kinnula,Finland
Decel tune keeps the TC locked up and coast clutch applied.
There are many variations between stock PCM calibrations,on how it's programmed to behave under engine braking situations.
There are many variations between stock PCM calibrations,on how it's programmed to behave under engine braking situations.
It's a Van Gogh
Joined: Feb 2010
Posts: 7,802
Likes: 1,333
From: Elk Grove, CA
Like the Finnster said, the DP decel tune firms up the transmission so the compression drag of the engine is passed thru to the wheels to slow the rig. Big contributor to that engine drag is from closing the EBPV. Without EBPV it's far less effective.
Detractors will say it increases exhaust back pressure so much it can float the valves, potentially causing valve/piston contact. Which depends on condition of your valve springs.
Detractors will say it increases exhaust back pressure so much it can float the valves, potentially causing valve/piston contact. Which depends on condition of your valve springs.
Thread Starter
|
More Turbo
Joined: Jan 2010
Posts: 571
Likes: 8
Ya i didn't have an EBPV with the DP tunes either but it did slow the truck down pretty good with however they did the transmission programming. Be nice if they made tunes for Hydra that was one of the best tow tunes i have used so far. But other tuners beat them as far as other tunes go not saying the other tuners tow tunes suck I like the shift points guess best fix is to get a trailer with brakes.
Trending Topics
Fleet Mechanic
Joined: Aug 2010
Posts: 1,456
Likes: 155
From: Sedalia, CO
If you don't have an EBPV, just press the OD off button on the stalk. In addition to keeping you out of OD - and downshifting if you are in OD when the button is pressed - it will apply the CC. If you are traveling above about 40mph the TC will likely be locked, too, and that's as good a decel tune as you can get without somehow blocking the exhaust. Also, and I'm sure you know this, any trailer of consequence needs brakes.
Mark
Mark
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Thread Starter
|
More Turbo
Joined: Jan 2010
Posts: 571
Likes: 8
Ya i need to pull my steering column cover off and find the dreaded wire that blows my fuse when i hit the OD off button its been this way for about 3 yeats now should prob fix it only drive my truck once a month mostly so i have pushed it off. The trailer weighs prob 1200 lbs maybe and my sxs is around 2k not alot of weight but i do feel it.
Thread
Thread Starter
Forum
Replies
Last Post
cherrybomb37
1999 - 2003 7.3L Power Stroke Diesel
4
Dec 12, 2013 11:38 AM
Robert6401
1999 - 2003 7.3L Power Stroke Diesel
17
Feb 8, 2011 07:48 AM