99 7.3 intermintent surge no codes

[hei69racing]

i have a7.3 that has asurge every once while at cruise and i cant trace it

 

[Bricks]

Try posting here, in the 7.3 section:
http://www.fordtruckfanatics.com/forum/forumdisplay.php?f=32

 

[blacksnapon]

is it automatic?

have a99 7.3 surging at hwy speeds intermintly and no codes any help would be apprecited

TSB
99-8-1 TRANSMISSION - 4R100 - SHIFT FLARE (RISE IN ENGINE RPM) DURING 2-3 AND/OR 3-4 UPSHIFT - VEHICLES BUILT THROUGH 12/7/1998 WITH 7.3L DIESEL ENGINE

Publication Date: APRIL 15, 1999

LIGHT TRUCK: 1999 SUPER DUTY F SERIES


This TSB article is being republished in its entirety to correct the vehicle build date.

CALIBRATION:
9DTA-AC, 9DTA-AD, 9DTA-AJ, 9DTA-AL, 9DTA-BB, 9DTA-BE

WARNING: THIS MODIFICATION IS AUTHORIZED ONLY FOR THE LISTED ENGINE. PERFORMING THIS MODIFICATION ON OTHER ENGINE CALIBRATIONS IS UNAUTHORIZED AND COULD CREATE LIABILITY UNDER APPLICABLE FEDERAL OR LOCAL LAWS.



ISSUE:
A shift flare (rise in engine rpm) of 200-300 rpm may occur intermittently during 2-3 and/or 3-4 upshift on some vehicles. This may be caused by reduced Pulse Width Modulated (PWM) flow at the transmission solenoid body assembly.

ACTION:
Replace the solenoid body with a revised Solenoid Body (F81Z-7G391-CB) and reprogram the Powertrain Control Module (PCM) with latest calibration. Refer to the following text for details.

Verify concern, then replace solenoid body assembly and reprogram PCM with new calibration. Refer to the 1999 Super Duty F-Series Workshop Manual, Section 307-01, for solenoid body assembly, removal, and installation procedures. Follow all normal service procedures as outlined in the Workshop Manual.

NOTE: REMOVAL OF THE TRANSMISSION FLUID FILTER ASSEMBLY IS NOT REQUIRED WHEN REPLACING THE SOLENOID BODY.



Obtain an Authorized Modifications Decal (FPS 8262 - obtainable through DOES II, 25/pkg) and list the date, dealer number, and summary of modifications performed. Select a prominent place adjacent to the Vehicle Emission Control Information Decal suitable for installing the Authorized Modifications Decal. Clean the area, install the decal, and cover it with a clear plastic decal shield.

 

[hei69racing]

It Is Automatic I Reflashed Pcm But Still Has Problem

 

[hei69racing]

It Also Has Ford Reman Trans

 

[d-kuzmen]

Could it just be the converter locking and unlocking, how long does it last and aprox rpm change?

 

[CaFordDude]

Welcome aboard man. Threads have been moved and merged together.

 

[hei69racing]

Rpm Dont Seem To Change Much

 

[d-kuzmen]

Rpm Dont Seem To Change Much

For the hell of it drive with the OD cancled and see if it does it. Im wondering if it's a converter locking issue.

 

[hei69racing]

Will Try It And Get Back To You Thanks