Torque Converter Hiss - Ford Powerstroke Diesel Forum
 
LinkBack Thread Tools Display Modes
post #1 of 6 Old 06-25-2013, 04:24 PM Thread Starter
Compression Ignition Addict
 
reighnman's Avatar
 
Join Date: Mar 2011
Posts: 169
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Torque Converter Hiss

I've been wondering what this is for a long time and today after driving around with the windows down got a bit annoyed. I just figured I'd ask in case it turns out to be something that eventually hurts the TC.

Basically I run H&S S2L which is 5th lockup only @ 45mph. When the TC locks, there is a loud swoosh or hissing noise similar to a boost depressurizing noise, though much slower. Hard to describe but if I'm just cruising around with minimal throttle (no boost) and the TC locks, as the RPMS dip there is a sppshhh noise. I can manipulate the sounds with throttle (like it's building pressure), say if I give it some throttle while it's pshhing I can carry it.

It could be coming from the turbos but it's really loud and sounds like it's coming from under the truck. It also doesn't stay in sync with boost pressure (gauge) so not sure. Doesn't sound like any of the typical turbo noise I hear outside of TC lock.

Black 2008 F250 Lariat 4x4 6.4L CC Job3, DPF/DOC Delete, H&S mini maxx, S&B Intake, vista-pro radiator
Black 2010 Mitsubishi Evolution, UR, AMS
reighnman is offline  
post #2 of 6 Old 06-25-2013, 05:22 PM
Compression Ignition Addict
 
WoodBoy's Avatar
 
Join Date: Sep 2010
Posts: 1,706
Thanks: 1
Thanked 17 Times in 17 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Its turbo surge. Not going into details but your rpms is dropping a good bit while your intake valves, etc arent accepting air as fas as they was and the air has to go somewhere so it trys to force back out the turbo

2010 CC/SB FX4 Lariat.. Tuned By Eric@IDP and Matt@Gearhead

Thinking about getting rid of the stock 6.7 turbo?
Check this out... and research before buying



http://www.powerstroke.org/forum/6-7...ustration.html

http://www.powerstroke.org/forum/6-7...round-2-a.html
WoodBoy is offline  
post #3 of 6 Old 06-25-2013, 05:29 PM Thread Starter
Compression Ignition Addict
 
reighnman's Avatar
 
Join Date: Mar 2011
Posts: 169
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
nm guess I'll just ignore or switch to S2H

Black 2008 F250 Lariat 4x4 6.4L CC Job3, DPF/DOC Delete, H&S mini maxx, S&B Intake, vista-pro radiator
Black 2010 Mitsubishi Evolution, UR, AMS

Last edited by reighnman; 06-25-2013 at 06:09 PM.
reighnman is offline  
post #4 of 6 Old 06-25-2013, 06:28 PM
Compression Ignition Addict
 
srjd's Avatar
 
Join Date: Nov 2008
Location: Ontario
Posts: 1,638
Thanks: 2
Thanked 9 Times in 9 Posts
Mentioned: 0 Post(s)
Quoted: 2 Post(s)
Feedback Score: 0 reviews
if it is turbo surge then switching shift schedule or tunes wont matter just dont floor it and let off really quick.....unless thts not your problem then i have no idea

01/07 Job 1 F350 H&S Tuned. ARP Studs, AFE 4'' straight pipe, EGR delete with elbow, AFE stage 2 CAI, 6'' lift on 37s, 20x12 Fuel Nuts two piece, Sinister coolant filter, CCV Mod, Projector headlights HID kit
srjd is offline  
post #5 of 6 Old 06-25-2013, 06:51 PM Thread Starter
Compression Ignition Addict
 
reighnman's Avatar
 
Join Date: Mar 2011
Posts: 169
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
There is minimal if any boost when the TC locks, I'm talking going into TC Lock @ 1500-2000 rpm with minimal throttle pos.

Black 2008 F250 Lariat 4x4 6.4L CC Job3, DPF/DOC Delete, H&S mini maxx, S&B Intake, vista-pro radiator
Black 2010 Mitsubishi Evolution, UR, AMS
reighnman is offline  
post #6 of 6 Old 06-26-2013, 01:54 AM
Compression Ignition Addict

 
tony97gt's Avatar
 
Join Date: May 2012
Location: Broward County
Posts: 645
Thanks: 5
Thanked 4 Times in 3 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 1 reviews
I asked the same question a few months ago but didn't get much help. It's not the turbo from what I can tell, I also believe it's the torque conv.

2008 F250 Harley Davidson 4x4, Upgraded LED lighting, JL Audio 13.5" Stealthbox, JL Audio C3 door speakers, JL Audio 500.1 for the stealthbox, JL Audio 400.4 for the doors, Viper 5704 alarm/SmartStart and GPS tracker, JimmiJammer door plates, JimmiJammer gateguard, Delete front lock/rear handle swap, DPF delete, MiniMaxx, 2.5" level, Sinister coolant filter, 55w 6000k HID's driving/fog lights, S+B CAI, MBRP 5" DP back exhaust, 35x12.5x20 TIS 20" rims, Nitto Trail Grapplers, adjustable track bar.
tony97gt 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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

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