05 PSD use only 1-4th gear sct. - Ford Powerstroke Diesel Forum
6.0L Performance Parts Discussion What has or has not worked for you?

Powerstroke.org is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 02-21-2011, 11:53 AM
Powerstroke.org Fanatic
 

Join Date: Jun 2010
Location: College Station/Boerne, Tx
Posts: 145
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
05 PSD use only 1-4th gear sct.

i have an 05 PSD and I got bigger tires for it and now it lugs in 5th gear. How can I program it with my SCT where it only shifts gears 1-4. Basically I dont want it to go into 5th gear. When I am goin 70 mph, its like 1400 rpm and I have to floor it to up hill. I really appricate the help thank you.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 02-21-2011, 11:58 AM
Compression Ignition Addict
 

Join Date: Apr 2009
Posts: 2,175
Thanks: 0
Thanked 2 Times in 2 Posts
Feedback Score: 0 reviews
you need a regear

you can change the shift points but I dont think you can tell it to not even use a gear.... your tuner should be able to help you.
Reply With Quote Quick reply to this message
  #3  
Old 02-21-2011, 12:07 PM
Powerstroke.org Fanatic
 

Join Date: Jun 2010
Location: College Station/Boerne, Tx
Posts: 145
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
how do i change the shift points on the sct? Im sure if I set the shift point from 4 to 5th like at 4000 rpm, it shouldn't shift to 5th.
Reply With Quote Quick reply to this message
  #4  
Old 02-21-2011, 12:08 PM
Compression Ignition Addict
 

Join Date: Nov 2008
Location: California
Posts: 4,260
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
Another option is to use the tow haul. The better option is to re-gear if you do not want to get a smaller tire size.
Reply With Quote Quick reply to this message
  #5  
Old 02-21-2011, 12:09 PM
Compression Ignition Addict
 

Join Date: Mar 2008
Location: FL
Posts: 4,246
Thanks: 21
Thanked 30 Times in 21 Posts
Feedback Score: 0 reviews
I think the only way to keep it from shifting into 5th would be to raise the 4-5 shift point to something like 5k rpm.

But the SMART thing to do would be to re-gear for your tire size. Your transmission will thank you.

Out of curiosity, what size tires are you running now?
Reply With Quote Quick reply to this message
  #6  
Old 02-21-2011, 12:12 PM
Powerstroke.org Fanatic
 

Join Date: Jun 2010
Location: College Station/Boerne, Tx
Posts: 145
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
I went from a 30.5" tire to a 35". how do i change the shift point on the sct? I would love to regear but my wallet doesn't lol.
Reply With Quote Quick reply to this message
  #7  
Old 02-21-2011, 12:16 PM
Compression Ignition Addict
 

Join Date: Mar 2008
Location: FL
Posts: 4,246
Thanks: 21
Thanked 30 Times in 21 Posts
Feedback Score: 0 reviews
Ben, with 35" tires you shouldn't even have to worry about staying out of 5th gear. Ford offered 6.0's with almost 34" tires (275/65/20) from the factory. You have 3.73 gears, right?

What SCT tune are you running?

Last edited by Snake; 02-21-2011 at 12:24 PM.
Reply With Quote Quick reply to this message
  #8  
Old 02-21-2011, 12:23 PM
Powerstroke.org Fanatic
 

Join Date: Jun 2010
Location: College Station/Boerne, Tx
Posts: 145
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
yes, but my truck dies going up hill and IM IN TEXAS TOO! lol no big hills here!.. And my fuel mileage dropped from 20.2mpg (hand Calc)to 15.0 as soon as i put those tires and rims on. I looked it up, and its actually a 34.4" The Stock 2011 wheels and tires. Could there be a correlation of some sort? They are not much wider then I originally had so their should be much more air resistance.
Reply With Quote Quick reply to this message
  #9  
Old 02-21-2011, 12:26 PM
'Merica


 

Join Date: Aug 2009
Location: Puyallup, WA
Posts: 2,132
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 1 reviews
my truck pulls 5th no problem.... 38" toyos and stock tuned....

Even when towing, i roll into the throttle and she carries just fine, w/out having EGT issues...

why your having problems. 1400rpm and my 6.0 pulls fine. Although my EGR has been disabled. Maybe your EGR system is still present?
Reply With Quote Quick reply to this message
  #10  
Old 02-21-2011, 12:28 PM
Compression Ignition Addict
 

Join Date: Nov 2005
Location: Far From Bieber
Posts: 2,069
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
I'm in the Hill Country and tow a gooseneck with backhoes and skid steers. I have 35x12.5x20 tires and I have plenty of power...and that was BEFORE I got my studs, egr delete and SCT. Haven't towed with the new mods yet but it should be a walk in the park compared to stock. I have 3.73 gears.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -8. The time now is 09:37 PM.


Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.1
Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

vB.Sponsors