Low/Reverse Clutch System

For low/reverse clutch operation, REFER to Hydraulic System or Mechanical System .

Courtesy of FORD MOTOR COMPANY

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	7G226	Rear planetary carrier
8	7D483	Low OWC snap ring
9	7A089	Low OWC
10	7005	Transmission case

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 .
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 .
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. REPLACE 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 piston seal leakage		INSTALL a new low/reverse clutch piston and seals. REFER to Mechanical System .
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 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 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 .
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 Hydraulic System .
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 piston seal leakage		INSTALL a new low/reverse clutch piston and seals. REFER to Mechanical System .
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 .
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 piston return spring		INSPECT the return spring for proper installation and damage. INSTALL new components as necessary. REFER to Mechanical System .