FORD 4R100 - "NON-PTO" AND "PTO" HYDRAULIC DIFFERENCES

CHANGE: Begining at the start of production for 1999 models, Ford Motor Company made available a "Power Take Off" option for some F250, F350, F450 and F550 Super Duty Trucks, equipped with 5.4L, 6.8L and 7.3L engines. More daignostic tool?

REASON: The "PTO" option addition, to the 4R100, required many changes to the transmission to make the "PTO" function. The "PTO" window, added to the case, the "PTO" drive gear and other cosmetic changes were previously covered in ATSG Bulletin No. 98-56. Hydraulic changes also had to be made to make the coast clutch operate in ranges other than the Drive ranges.

PARTS AFFECTED:
(1)TRANSMISSION CASE: The transmission case was changed to acommodate the "PTO" window, as shown in ATSG Bulletin No. 98-56. All 4R100 Cases, "NON-PTO"and "PTO,"also had a "Dam" added to seperate "Rear Lube" and to incorperate "Central Lube".

VALVE BODY TO CASE SPACER PLATE: The Valve Body to Case Spacer plate on the "PTO" versions had a hole added to supply the 3-4 Shift Valve with Line Pressure. A hole was also added to the Spacer Plate on "NON-PTO" and "PTO" versions to connect "Solenoid Regulator Valve" oil to supply "Central Lubrication."

(3)MAIN VALVE BODY: A passage was added on the "Upper Side" of the Main Valve Body on "PTO" versions, as shown in Figure 5, to supply Line Pressure to the 3-4 Shift Valve. A passage was also added, on the "Lower Side" of the Main Valve Body, to connect the 3-4 Shift Valve (Coast Clutch Circuit) to an exhaust.The spring side of the 3-4 Shift Valve was also seperated from the Low/Reverse circuit.

(4)LOWER VALVE BODY: The Lower Valve Body had a passage added, to connect to the "new"exhaust passage in the Main Valve Body.

(5)LOWER VALVE BODY SPACER PLATE: The Lower Valve Body Spacer Plate had a hole added to connect the "new" exhaust passage in the Main Valve Body to the "new" exhaust passage in the Lower Valve body.

INTERCHANGEABILITY:
None of the parts listed above will interchange between "NON-PTO" and "PTO" versions.

SERVICE INFORMATION:
Valve Body To Case Spacer Plate (Non-PTO) .................. ................................F81Z-7A008-DA
Valve Body To Case Spacer Plate (PTO) ...........................................................F81Z-7A008-BA
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