Trans line pressure rise - PowerStrokeNation : Ford Powerstroke Diesel Forum
 
LinkBack Thread Tools Display Modes
post #1 of 9 (permalink) Old 06-10-2010, 04:59 AM Thread Starter
PSN Veteran
 
Join Date: Jul 2008
Location: Northwest, OR
Posts: 2,081
Trans line pressure rise

Okay, the trans is working good under light throttle. Under medium throttle it acts as if it isn't raising line pressure and the shifts kind of dissapear! Is there something that isn't telling the computer to raise line pressure? I don't have the green or red lines hooked up anymore, don't know if that has anything to do with anything or not.
Any insight is a appreciated. We have air-checked everything in the trans and had it apart to check for internal leaks. The trans has a tugger shift kit and has a .426 boost valve in it and it still doesn't shift. This is why I'm looking toward the electronics.
bigjake0524 is offline  
Sponsored Links
Advertisement
 
post #2 of 9 (permalink) Old 06-10-2010, 11:24 AM
PSN Local
 
Shaw's Avatar
 
Join Date: Aug 2007
Location: Ohio
Posts: 254
Re: Trans line pressure rise

Under hard pedal does it run up the RPM and then to get it to shift to the next gear do you have to lift the pedal? This happen to me and it was because I forgot a couple check balls in the valve body.

As for the green and red lines - are you talking about the waste gate lines on the engine? If so, it will have nothing to do with your issue.

"It's JUSTa 7.3"

His - 01 F-350 Reg cab 4x4 auto
Hers - 00 F-350 Crew long bed 4x4 auto
Kids - 01 EX Limited
Toy - 97 F-350 Reg cab 4X4 5spd


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Shaw is offline  
post #3 of 9 (permalink) Old 06-10-2010, 01:16 PM Thread Starter
PSN Veteran
 
Join Date: Jul 2008
Location: Northwest, OR
Posts: 2,081
Re: Trans line pressure rise

All shifting is on time, there are no delays or flares. The just act like it's not getting line pressure rise under throttle. We hooked up a Snap-On Solis scanner and it reads map as voltage and it didn't really change under throttle. Where as when put on a 97,99,01 and an 02 it changed exponentially under load. I have been chasing this little gremlin and have gone through 3 sets of third gear clutches and a couple of second gear clutches. We know the tranny is right it has been out 5 times. We tore it down once just to double check everything.
bigjake0524 is offline  
 
post #4 of 9 (permalink) Old 06-10-2010, 02:56 PM
PSN Local
 
Shaw's Avatar
 
Join Date: Aug 2007
Location: Ohio
Posts: 254
Re: Trans line pressure rise

hmm, If it was me I would put a manual gauge on it and watch it. See what it is doing and then go from there.

One time on my first trany I rebuilt I put the Tugger kit in and used the wrong spring on the PWM (the kit has two springs that are the same color but one is much stronger then the other) It felt similar to what you are saying is going on with yours? Might want to check that too?

"It's JUSTa 7.3"

His - 01 F-350 Reg cab 4x4 auto
Hers - 00 F-350 Crew long bed 4x4 auto
Kids - 01 EX Limited
Toy - 97 F-350 Reg cab 4X4 5spd


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Shaw is offline  
post #5 of 9 (permalink) Old 06-10-2010, 02:58 PM Thread Starter
PSN Veteran
 
Join Date: Jul 2008
Location: Northwest, OR
Posts: 2,081
Re: Trans line pressure rise

I will throw the gauge back on it and double check, I am at a loss on this thing!
bigjake0524 is offline  
post #6 of 9 (permalink) Old 06-16-2010, 02:55 AM
PSN Veteran
 
JHill's Avatar
 
Join Date: Jul 2007
Location: NW Oregon
Posts: 1,258
Re: Trans line pressure rise

sweet 2 full days and you haven't broke it yet

E '99 F-350 CC LB, ZF6, IDP -T4i Mount, Comp. Fuel System, , Reg. Return, Comp Valve springs, ARP's, DI P- Rods, Adrenaline HPOP, Isspro's, Detroit Tru Trac

238/200
ISM HX50
Tyrant Tunes
South Bend DD



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
JHill is offline  
post #7 of 9 (permalink) Old 06-16-2010, 03:32 AM
Snake Oil Salesman
 
mattr66's Avatar
 
Join Date: Apr 2008
Location: Bryan, TX
Posts: 5,346
Re: Trans line pressure rise

Log the EPC and make sure the tuning is commanding pressure for the shifts.

Matt Robinson
Gearhead Automotive Performance

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Quote:
Originally Posted by PSDPlayer View Post
If you have nozzles that were Extrude honed over and over and over again. It will look like a porn stars ass.hole where the pintle is supposed to seal.
mattr66 is offline  
post #8 of 9 (permalink) Old 06-16-2010, 04:27 AM
PSN Veteran
 
JHill's Avatar
 
Join Date: Jul 2007
Location: NW Oregon
Posts: 1,258
Re: Trans line pressure rise

I think thats what we took out of the equation
(9 pin harness and + wire) on pass side of the trans to get max line pressure and ruled out the trans itself, and swamps rerwrote the tunes ,so far all is good. were you at Jake

E '99 F-350 CC LB, ZF6, IDP -T4i Mount, Comp. Fuel System, , Reg. Return, Comp Valve springs, ARP's, DI P- Rods, Adrenaline HPOP, Isspro's, Detroit Tru Trac

238/200
ISM HX50
Tyrant Tunes
South Bend DD



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
JHill is offline  
post #9 of 9 (permalink) Old 06-16-2010, 04:29 AM Thread Starter
PSN Veteran
 
Join Date: Jul 2008
Location: Northwest, OR
Posts: 2,081
Re: Trans line pressure rise

Drove it with a gauge hooked up and it sits right at 100-110 at an idle once in gear it increases to 150 and pretty much holds right there. Hopefully it will keep the clutches from burning up now in forward, and second.
bigjake0524 is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the PowerStrokeNation : 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










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