Low/Reverse Clutch System

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

For low/reverse clutch operation, REFER to AUTOMATIC TRANSMISSION .

Item	Part Number	Description
1	7222	Cover assembly
2	7D402	Low/reverse clutch piston
3	7B070	Low/reverse clutch piston return spring
4	7C122	Low/reverse clutch return spring snap ring
5	7B442	Low/reverse clutch steel plates
6	7B164	Low/reverse clutch friction plates
7	7G262	Rear planetary carrier
8	7D483	Low OWC snap ring
9	7A089	Low OWC
10	7005	Transmission case

LOW/REVERSE CLUTCH SYSTEM

Condition	Possible Sources	Action
Low/Reverse clutch does not apply	Solenoid body filter blocked to SSD	CLEAN or INSTALL a new solenoid body filter screen. REFER to SOLENOID BODY ASSEMBLY .
	SSD mechanically stuck OFF	INSTALL a new solenoid body. REFER to SOLENOID BODY ASSEMBLY . Perform the SOLENOID BODY STRATEGY , REFER to SOLENOID BODY STRATEGY DOWNLOAD .
	Low/Reverse clutch (CBLR/C456) regulator valve stuck OFF	DISASSEMBLE, CLEAN and INSPECT the low/reverse clutch regulator valve. If bore or valve is damaged, INSTALL a new main control valve body. REFER to MAIN CONTROL VALVE BODY .
	SSD SIG, CBLR/C456 SUPPLY, CBLR SUPPLY 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 .
	REV/SSE SIG to multiplex shift valve shuttle ball missing/damaged	REMOVE the main control valve body and INSPECT the check ball missing/damage. REFER to MAIN CONTROL VALVE BODY .
	Multiplex shift valve stuck in default position	DISASSEMBLE, CLEAN and INSPECT the multiplex shift valve. If bore or valve is damaged, INSTALL a new main control valve body. REFER to MAIN CONTROL VALVE BODY .
	CBLR SUPPLY hydraulic circuit blocked or leaking	DISASSEMBLE and INSPECT the transmission cover passages for debris/blockage. CLEAN as necessary. REFER to HYDRAULIC SYSTEM , LOW - REVERSE CLUTCH HYDRAULIC CIRCUITS .
	Rear planetary carrier/center ring gear	INSPECT the planetary carrier/center ring gear for wear and damage that would prevent the gear from being held. INSTALL new components as necessary.
	Low/Reverse clutch friction plates	DISASSEMBLE and INSPECT the low/reverse clutch friction and steel plates. INSTALL new components as necessary. REFER to MECHANICAL SYSTEM , LOW - REVERSE CLUTCH .
	Low/Reverse clutch piston seal leakage	INSTALL a new low/reverse clutch piston and seals. REFER to MECHANICAL SYSTEM , LOW - REVERSE CLUTCH .
Low/Reverse clutch always applied	Solenoid body filter seal damaged at SSD	INSTALL a new solenoid body filter screen. REFER to SOLENOID BODY ASSEMBLY .
	SSD mechanically stuck ON	INSTALL a new solenoid body. REFER to SOLENOID BODY ASSEMBLY . Perform the SOLENOID BODY STRATEGY , REFER to SOLENOID BODY STRATEGY DOWNLOAD .
	Low/Reverse clutch (CBLR/C456) regulator valve stuck ON	DISASSEMBLE, CLEAN and INSPECT the low/reverse clutch regulator valve and bias spring. If bore or valve is damaged, INSTALL a new main control valve body. REFER to MAIN CONTROL VALVE BODY .
	SSD SIG, CBLR/C456 SUPPLY, CBLR SUPPLY hydraulic circuits blocked/leaking	DISASSEMBLE and INSPECT the main control valve body and separator plate passages for leakage. CLEAN as necessary. REFER to HYDRAULIC SYSTEM , LOW - REVERSE CLUTCH HYDRAULIC CIRCUITS .
	Low OWC	INSPECT the low OWC for free rotation in overrun direction. INSTALL new components as necessary.
	Low/Reverse clutch friction plates	DISASSEMBLE and INSPECT the low/reverse clutch friction and steel plates. INSTALL new components as necessary. REFER to MECHANICAL SYSTEM , LOW - REVERSE CLUTCH .
Low/Reverse clutch delayed/soft/slipping apply	Incorrect Solenoid Body Strategy programmed into PCM	REFER to SOLENOID BODY STRATEGY DOWNLOAD .
	Solenoid body filter seal damaged at SSD	INSTALL a new solenoid body filter screen. REFER to SOLENOID BODY ASSEMBLY .
	SSD mechanically sticking	INSTALL a new solenoid body. REFER to SOLENOID BODY ASSEMBLY . Perform the SOLENOID BODY STRATEGY , REFER to SOLENOID BODY STRATEGY DOWNLOAD .
	Low/Reverse clutch (CBLR/C456) regulator valve sticking	DISASSEMBLE, CLEAN and INSPECT the low/reverse clutch regulator valve. If bore or valve is damaged, INSTALL a new main control valve body. REFER to MAIN CONTROL VALVE BODY .
	Low/Reverse clutch (CBLR/C456) boost valve stuck ON	DISASSEMBLE, CLEAN and INSPECT the low/reverse clutch regulator valve. If bore or valve is damaged, INSTALL a new main control valve body. REFER to MAIN CONTROL VALVE BODY .
	SSD SIG, CBLR/C456 SUPPLY, CBLR SUPPLY 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 .
	REV/SSE SIG to multiplex shift valve shuttle ball missing/damaged	REMOVE the main control valve body and INSPECT the check ball missing/damage. REFER to MAIN CONTROL VALVE BODY .
	CBLR supply hydraulic circuit blocked or leaking	DISASSEMBLE and INSPECT the transmission cover passages for debris/blockage. CLEAN as necessary. REFER to MECHANICAL SYSTEM , LOW - REVERSE CLUTCH HYDRAULIC CIRCUITS .
	Low/Reverse clutch friction plates	DISASSEMBLE and INSPECT the low/reverse clutch friction and steel plates. INSTALL new components as necessary. REFER to MECHANICAL SYSTEM , LOW - REVERSE CLUTCH .
	Low/Reverse clutch piston seal leakage	INSTALL a new low/reverse clutch piston and seals. REFER to MECHANICAL SYSTEM , LOW - REVERSE CLUTCH .
Low/Reverse clutch harsh apply	Incorrect Solenoid Body Strategy programmed into PCM	REFER to SOLENOID BODY STRATEGY DOWNLOAD .
	SSD mechanically sticking	INSTALL a new solenoid body. REFER to SOLENOID BODY ASSEMBLY . Perform the SOLENOID BODY STRATEGY , REFER to SOLENOID BODY STRATEGY DOWNLOAD .
	Low/Reverse clutch (CBLR/C456) regulator valve sticking	DISASSEMBLE, CLEAN and INSPECT the low/reverse 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 .
	SSD SIG, CBLR/C456 SUPPLY, CBLR SUPPLY 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 .
	Low/Reverse clutch friction plates	DISASSEMBLE and INSPECT the low/reverse clutch friction and steel plates. INSTALL new components as necessary. REFER to MECHANICAL SYSTEM , LOW - REVERSE CLUTCH .
	Low/Reverse clutch piston return spring	INSPECT the return spring for proper installation and damage. INSTALL new components as necessary. REFER to MECHANICAL SYSTEM , LOW - REVERSE CLUTCH .