Forward Clutch System

WARNING: This page is about a different variant/trim than selected.

For forward (1, 2, 3, 4) clutch operation, REFER to AUTOMATIC TRANSMISSION .

Item	Part Number	Description
1	7D483	Low OWC snap ring
2	7A089	Low OWC
3	7B164	Forward clutch friction plates
4	7B442	Forward clutch steel plates
5	7B070	Forward clutch waved cushion spring
6	7H365	Forward clutch piston snap ring
7	7B070	Forward clutch piston return spring
8	7A262	Forward clutch piston
9	7D064	Front sun gear and shell assembly
10	7005	Transmission case

FORWARD CLUTCH

Condition	Possible Sources	Action
Forward (1, 2, 3, 4) clutch does not apply	Solenoid body filter blocked to SSA	CLEAN or INSTALL a new solenoid body filter screen. REFER to SOLENOID BODY ASSEMBLY .
	SSA mechanically stuck OFF	INSTALL a new solenoid body. REFER to SOLENOID BODY ASSEMBLY . Download the new Solenoid Body Strategy into the PCM, REFER to SOLENOID BODY STRATEGY DOWNLOAD .
	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 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. CLEAN as necessary. REFER to HYDRAULIC SYSTEM , SOLENOID HYDRAULIC CIRCUITS .
	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 .
	Front planetary sun gear and shell assembly	INSPECT the sun gear and shell for wear and damage. INSTALL new components as necessary, REFER to MECHANICAL SYSTEM , FRONT PLANETARY CARRIER HUB (OUTPUT HUB) .
	Low OWC snap ring	INSPECT the low OWC snap ring for proper seating in case. REFER to MECHANICAL SYSTEM , LOW ONE WAY CLUTCH .
	Low OWC/Forward (1, 2, 3, 4) clutch steel plate	INSPECT the low OWC/Forward (1, 2, 3, 4) clutch steel plate surface. REPLACE low OWC as necessary. REFER to MECHANICAL SYSTEM , LOW ONE WAY CLUTCH .
	Low OWC/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 , FORWARD (1, 2, 3, 4) CLUTCH .
	Forward (1, 2, 3, 4) clutch piston seal leakage.	INSTALL a new forward (1, 2, 3, 4) clutch piston. REFER to MECHANICAL SYSTEM , FORWARD (1, 2, 3, 4) CLUTCH .
Forward (1, 2, 3, 4) clutch always applied	Solenoid body filter seal damaged at SSA	INSTALL a new solenoid body filter screen. REFER to SOLENOID BODY ASSEMBLY .
	SSA mechanically stuck ON	INSTALL a new solenoid body. REFER to SOLENOID BODY ASSEMBLY . Download the new Solenoid Body Strategy into the PCM, REFER to SOLENOID BODY STRATEGY DOWNLOAD .
	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 check ball for blocked passage. CLEAN as necessary. REFER to HYDRAULIC SYSTEM , SOLENOID HYDRAULIC CIRCUITS .
	Front planetary sun gear and shell assembly	INSPECT the sun gear and shell for damage that would prevent free rotation. INSTALL new components as necessary, REFER to MECHANICAL SYSTEM , FRONT PLANETARY CARRIER HUB (OUTPUT HUB) .
	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 , FORWARD (1, 2, 3, 4) CLUTCH .
	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 , FORWARD (1, 2, 3, 4) CLUTCH .
Forward (1, 2, 3, 4) clutch delayed/soft/slipping apply	Incorrect Solenoid Body Strategy programmed into PCM	REFER to SOLENOID BODY STRATEGY DOWNLOAD .
	Solenoid body filter seal damaged at SSA	INSTALL a new solenoid body filter screen. REFER to SOLENOID BODY ASSEMBLY .
	SSA mechanically sticking	INSTALL a new solenoid body. REFER to SOLENOID BODY ASSEMBLY . Perform the SOLENOID BODY STRATEGY , REFER to SOLENOID BODY STRATEGY DOWNLOAD .
	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 MAIN CONTROL VALVE BODY .
	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. CLEAN as necessary. REFER to HYDRAULIC SYSTEM , SOLENOID HYDRAULIC CIRCUITS .
	C1234 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	INSPECT the low OWC/Forward (1, 2, 3, 4) clutch pressure plate surface. REPLACE low OWC as necessary.
	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 , FORWARD (1, 2, 3, 4) CLUTCH .
	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 , FORWARD (1, 2, 3, 4) CLUTCH .
Forward (1, 2, 3, 4) clutch harsh apply	Incorrect Solenoid Body Strategy programmed into PCM	REFER to SOLENOID BODY STRATEGY DOWNLOAD .
	SSA mechanically sticking	INSTALL a new solenoid body. REFER to SOLENOID BODY ASSEMBLY . Perform the SOLENOID BODY STRATEGY , REFER to SOLENOID BODY ASSEMBLY .
	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 valve body and separator plate passages for leakage. INSPECT CB1234 check ball for blocked passage. CLEAN as necessary. REFER to HYDRAULIC SYSTEM , SOLENOID HYDRAULIC CIRCUITS .
	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 , FORWARD (1, 2, 3, 4) CLUTCH .
	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 , FORWARD (1, 2, 3, 4) CLUTCH .