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Home >> Ford >> 2012 >> Explorer Base, 3.5 8, AWD, 6F50 >> Repair and Diagnosis >> External Pages >> Different car >> Section 226 (Automatic Transmission - 6F35) >> Diagnosis And Testing >> Automatic Transmission >> Component Tests >> Forward Clutch System

Forward Clutch System

WARNING: This page is about a different car, the 2013 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.

For forward (1, 2, 3, 4) clutch operation, REFER to HYDRAULIC SYSTEM - 6F35  or MECHANICAL SYSTEM - 6F35 .

G08411569Courtesy of FORD MOTOR CO.
Item Part Number Description
1 7005 Transmission case
2 7l328 Center support
3 7A262 Forward clutch piston
4 7B070 Forward clutch piston return spring
5 7H365 Forward clutch piston return spring snap ring
6 7B070 Forward clutch wave spring
7 7B164 Forward (1, 2, 3, 4) clutch
8 7B066 Forward clutch pressure plate
9 7D438 Forward clutch snap ring
10 7A019 Front sun gear and shell assembly
FORWARD CLUTCH

Condition Possible Sources Action
  • Forward (1, 2, 3, 4) clutch does not apply
  • Solenoid filter blocked to SSA 
  • SSA  mechanically stuck OFF
  • INSTALL a new SSA  . REFER to SOLENOIDS .
  • Forward (1, 2, 3, 4) clutch regulator valve stuck OFF
  • DISASSEMBLE, CLEAN and INSPECT the forward (1, 2, 3, 4) clutch regulator valve. If bore or valve is damaged, INSTALL a new main control valve body. REFER to MAIN CONTROL - OVERHAUL .
  • SSA  SIG, CB1234, CB1234 SUP hydraulic circuits blocked/leaking
  • DISASSEMBLE and INSPECT the main control and separator plate passages for debris/blockage. CLEAN as necessary. REFER to HYDRAULIC SYSTEM - 6F35 .
  • CB1234 seal leaking
  • REMOVE the main control, REFER to MAIN CONTROL - OVERHAUL . INSPECT the CB1234 circuit seal between the main control valve body and the transmission case for missing or damaged seal. INSTALL a new seal. REFER to MAIN CONTROL - OVERHAUL .
  • Front planetary sun gear and shell assembly
  • INSPECT the sun gear and shell for wear and damage. INSTALL new components as necessary, REFER to TRANSMISSION - OVERHAUL .
  • Low OWC  snap ring
  • Forward (1, 2, 3, 4) clutch steel plate
  • DISASSEMBLE and INSPECT the forward (1, 2, 3, 4) clutch steel plates. INSTALL new components as necessary. REFER to MECHANICAL SYSTEM - 6F35 .
  • Forward (1, 2, 3, 4) clutch friction plates
  • DISASSEMBLE and INSPECT the forward (1, 2, 3, 4) clutch friction and steel plates. INSTALL new components as necessary. REFER to MECHANICAL SYSTEM - 6F35 .
  • Forward (1, 2, 3, 4) clutch piston seal leakage.
  • Forward (1, 2, 3, 4) clutch always applied
  • Solenoid filter or seal damaged at SSA 
  • SSA  mechanically stuck ON
  • INSTALL a new SSA  . REFER to SOLENOIDS .
  • Forward (1, 2, 3, 4) clutch regulator valve stuck ON
  • DISASSEMBLE, CLEAN and INSPECT the forward (1, 2, 3, 4) clutch regulator valve. If bore or valve is damaged, INSTALL a new main control valve body. REFER to MAIN CONTROL VALVE BODY .
  • SSA  SIG, CB1234, CB1234 SUP hydraulic circuits blocked/leaking
  • °DISASSEMBLE and INSPECT the main control valve body and separator plate passages for leakage. INSPECT the CB1234 circuit seal between the main control valve body and the transmission case for missing or damaged seal. INSTALL a new seal. REFER to HYDRAULIC SYSTEM - 6F35 .
  • Front planetary sun gear and shell assembly
  • INSPECT the sun gear and shell for wear and damage. INSTALL new components as necessary, REFER to TRANSMISSION - OVERHAUL .
  • Forward (1, 2, 3, 4) clutch friction plates
  • DISASSEMBLE and INSPECT the forward (1, 2, 3, 4) clutch friction and steel plates. INSTALL new components as necessary. REFER to MECHANICAL SYSTEM - 6F35 .
  • Forward (1, 2, 3, 4) clutch piston return spring
  • INSPECT the return spring for proper installation and damage. INSTALL new components as necessary. REFER to MECHANICAL SYSTEM - 6F35 .
  • Forward (1, 2, 3, 4) clutch delayed/soft/slipping apply
  • Incorrect Solenoid Body Strategy programmed into TCM 
  • Solenoid filter or seal damaged at SSA 
  • SSA  mechanically sticking
  • INSTALL a new SSA  . REFER to SOLENOIDS .
  • Forward (1, 2, 3, 4) clutch regulator valve sticking
  • DISASSEMBLE, CLEAN and INSPECT the forward (1, 2, 3, 4) clutch regulator valve. If bore or valve is damaged, INSTALL a new main control valve body. REFER to MECHANICAL SYSTEM - 6F35 .
  • Forward (1, 2, 3, 4) clutch boost valve stuck ON
  • DISASSEMBLE, CLEAN and INSPECT the forward (1, 2, 3, 4) clutch boost valve and bias spring. If bore, valve or spring is damaged, INSTALL a new main control valve body. REFER to MAIN CONTROL VALVE BODY .
  • SSA  SIG, CB1234, CB1234 SUP hydraulic circuits blocked/leaking
  • DISASSEMBLE and INSPECT the main control valve body and separator plate passages for debris/blockage. INSPECT the CB1234 circuit seal between the main control valve body and the transmission case for missing or damaged seal. INSTALL a new seal. REFER to HYDRAULIC SYSTEM - 6F35 .
  • CB1234 seal leaking
  • REMOVE the main control valve body, REFER to MAIN CONTROL VALVE BODY . INSPECT the CB1234 circuit seal between the main control valve body and the transmission case for missing or damaged seal. INSTALL a new seal. REFER to MAIN CONTROL VALVE BODY .
  • Low OWC 
  • Forward (1, 2, 3, 4) clutch pressure plate
  • DISASSEMBLE and INSPECT the forward (1, 2, 3, 4) clutch pressure plate. INSTALL new components as necessary. REFER to TRANSMISSION - OVERHAUL .
  • Forward (1, 2, 3, 4) clutch friction plates
  • DISASSEMBLE and INSPECT the forward (1, 2, 3, 4) clutch friction and steel plates. INSTALL new components as necessary. REFER to MECHANICAL SYSTEM - 6F35 .
  • Forward (1, 2, 3, 4) clutch piston return spring
  • INSPECT the return spring for proper installation and damage. INSTALL new components as necessary. REFER to MECHANICAL SYSTEM - 6F35 .
  • Forward (1, 2, 3, 4) clutch harsh apply
  • Incorrect Solenoid Body Strategy programmed into TCM 
  • SSA  mechanically sticking
  • INSTALL a new SSA  . REFER to SOLENOIDS .
  • Forward (1, 2, 3, 4) clutch regulator valve sticking
  • DISASSEMBLE, CLEAN and INSPECT the forward (1, 2, 3, 4) clutch regulator valve and bias spring. If bore, valve or spring is damaged, INSTALL a new main control valve body. REFER to MAIN CONTROL VALVE BODY .
  • Forward (1, 2, 3, 4) clutch boost valve sticking
  • DISASSEMBLE, CLEAN and INSPECT the forward (1, 2, 3, 4) clutch boost valve and bias spring. If bore, valve or spring is damaged, INSTALL a new main control valve body. REFER to MAIN CONTROL VALVE BODY .
  • SSA  SIG, CB1234, CB1234 SUP hydraulic circuits blocked/leaking
  • DISASSEMBLE and INSPECT the main control and separator plate passages for leakage. INSPECT CB1234 check ball for blocked passage. CLEAN as necessary. REFER to HYDRAULIC SYSTEM - 6F35 .
  • Forward (1, 2, 3, 4) clutch piston return spring
  • INSPECT the return spring for proper installation and damage. INSTALL new components as necessary. REFER to MECHANICAL SYSTEM - 6F35 .
  • Forward (1, 2, 3, 4) clutch friction plates
  • DISASSEMBLE and INSPECT the forward (1, 2, 3, 4) clutch friction and steel plates. INSTALL new components as necessary. REFER to MECHANICAL SYSTEM - 6F35 .
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