What is "shift flare"? - Ford Powerstroke Diesel Forum
6.0L Performance Parts Discussion What has or has not worked for you?

 
LinkBack Thread Tools Display Modes
post #1 of 6 Old 02-23-2013, 11:16 AM Thread Starter
Powerstroke.org Fanatic
 
Dene2006's Avatar
 
Join Date: Jan 2011
Posts: 105
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
What is "shift flare"?

I see that term coming up once in a while. I'm running Matt's SRL and find that when it shifts into high at about 48 mph the cab noise gets quite bad and the motor seems to lug. Now is the noise coming from the tc locking up? Also I've read that sometimes the tranny goes from 4-6? Really?

2004 F250 CCSB 2wd
SCT = Gearhead & Looney
MBRP 4" / S&B CAI

Borrowing money is like negotiating a pay cut for your future self...
Dene2006 is offline  
post #2 of 6 Old 02-23-2013, 11:28 AM
Mod Newbie

 
dhanna6powerstroke's Avatar
 
Join Date: Feb 2008
Location: Bloomington, IN.
Posts: 13,156
Thanks: 6
Thanked 143 Times in 135 Posts
Mentioned: 0 Post(s)
Quoted: 17 Post(s)
Feedback Score: 2 reviews
Shift flare is when it gets ready to shift from one gear to another and it feels like it slips or goes into neutral for a split second. Usually most noticeable when shifting from 3rd gear.

dhanna6powerstroke is offline  
post #3 of 6 Old 02-23-2013, 11:32 AM Thread Starter
Powerstroke.org Fanatic
 
Dene2006's Avatar
 
Join Date: Jan 2011
Posts: 105
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Quote:
Originally Posted by dhanna6powerstroke View Post
Shift flare is when it gets ready to shift from one gear to another and it feels like it slips or goes into neutral for a split second. Usually most noticeable when shifting from 3rd gear.
thanks, I don't think I've experienced that symptom then. Sounds like it would be hard on parts in the tranny.

2004 F250 CCSB 2wd
SCT = Gearhead & Looney
MBRP 4" / S&B CAI

Borrowing money is like negotiating a pay cut for your future self...
Dene2006 is offline  
post #4 of 6 Old 02-23-2013, 11:35 AM
Mod Newbie

 
dhanna6powerstroke's Avatar
 
Join Date: Feb 2008
Location: Bloomington, IN.
Posts: 13,156
Thanks: 6
Thanked 143 Times in 135 Posts
Mentioned: 0 Post(s)
Quoted: 17 Post(s)
Feedback Score: 2 reviews
Quote:
Originally Posted by Dene2006 View Post
thanks, I don't think I've experienced that symptom then. Sounds like it would be hard on parts in the tranny.
Yeah. Tuning has a lot to do with it and Matt is one of the best when it comes to trans. tuning.

dhanna6powerstroke is offline  
post #5 of 6 Old 02-23-2013, 12:02 PM
Premium Member

 
twoicebergs's Avatar
 
Join Date: Sep 2008
Location: Oakbank, Manitoba
Posts: 3,434
Thanks: 8
Thanked 125 Times in 117 Posts
Mentioned: 4 Post(s)
Quoted: 37 Post(s)
Feedback Score: 0 reviews
The early lock-up in OD can be problematic with a load because the torque just isn't there when you need it. For an empty truck, it isn't much of an issue, the same for a race since it won't be in OD until at a much faster speed. The vibration is typical up to about 1700ish rpm, especially if you have parts that are rubbing on the cab or frame (exhaust) or harmonics from the exhaust.

One gear in the trans is only used when cold. So it is practically a 5 speed. Plus the TC slips as part of its design when cold and for smoother lock-up. Most flare is not really a big deal, unless it gets out of control or creates undue heat engaging under high power.

Frank
2007 F-250 Lariat Crew. MBM 190/50s,
KC-68 Stage 3 Turbo,
DashBoss/F/P, and a few other goodies
Stiction Problems - Fix it yourself! - http://www.powerstroke.org/forum/gen...ml#post4509754
Want to modify your injectors DIY - http://www.powerstroke.org/forum/6-0...ger-flows.html

Working for Toys
twoicebergs is offline  
post #6 of 6 Old 02-23-2013, 12:37 PM
Compression Ignition Addict
 
sprksonu's Avatar
 
Join Date: Dec 2012
Location: Glendale, AZ
Posts: 921
Thanks: 11
Thanked 22 Times in 20 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 2 reviews
the srl locks the tc around 45 or so if you dont like it call lars at gearhead and he can adjust it for you and send a new tune

WRECKED EM DAMN NEAR KILLED EM! 2005 f250 ccsb 4x4 Studded, 03 turbo w/billet wheel, AFE stage2, 5"diamond eye, BPD egr cooler & "NEW" external oil cooler, BPD 48v FICM, BPD water pump, BPD aluminum radiator, 6.4 banjo's, blue spring, HFCM e-z drain, riff raff boots, gearhead srl tune , PHP FICM tune, sct livewire 5015, updated stc, updated stand pipes & dummy plugs, updated oil feed & drain, Zerex ELC coolant, Pro Comp 6" lift, 325/70/17 Toyo open country at
sprksonu is offline  
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:
OR

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
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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

 
For the best viewing experience please update your browser to Google Chrome