F 250 2WD Super Duty V8-7.3L DSL Turbo VIN F (1999)
Shift Solenoid: Customer Interest
A/T - 4R100 Engine RPM Rise During 2-3/3-4 Upshift
Article No.
99-8-1
05/03/99
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
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(S). 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.
PART NUMBER
PART NAME
F81Z-7G391-CB
Solenoid Body
OTHER APPLICABLE ARTICLES: NONE
