Low/Reverse 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 low/reverse clutch operation, REFER to HYDRAULIC SYSTEM - 6F35 or MECHANICAL SYSTEM - 6F35 .

Courtesy of FORD MOTOR CO.

Item	Part Number	Description
1	7005	Transmission case
2	7A089	Low/OWC
3	7D491	Rear planetary carrier
4	7B066	Low/reverse clutch pressure plate
5	7B164	Low/reverse clutch
6	7E085	Low/reverse clutch wave spring
7	7C122	Low/reverse clutch piston return spring snap ring
8	7B070	Low/reverse clutch piston return spring
9	7D042	Low/reverse clutch piston
10	7L328	Center support

LOW/REVERSE CLUTCH SYSTEM

Condition	Possible Sources	Action
Low/Reverse clutch does not apply	Solenoid filter blocked to SSD	CLEAN or REPLACE the solenoid body filter screen. REFER to MAIN CONTROL - OVERHAUL .
	SSD mechanically stuck OFF	INSTALL a new SSD . REFER to SOLENOIDS .
	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. 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 - 6F35 .
	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 - OVERHAUL .
	Multiplex shift valve stuck in default position	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 - 6F35 .
	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. REFER to TRANSMISSION - OVERHAUL .
	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 - 6F35 .
	Low/Reverse clutch piston seal leakage	INSTALL a new low/reverse clutch piston and seals. REFER to MECHANICAL SYSTEM - 6F35 .
Low/Reverse clutch always applied	Solenoid filter or seal damaged at SSD	REFER to MAIN CONTROL - OVERHAUL .
	SSD mechanically stuck ON	INSTALL a new SSD . REFER to SOLENOIDS .
	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. 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 - 6F35 .
	Low OWC	INSPECT the low OWC for free rotation in overrun direction. INSTALL new components as necessary. REFER to TRANSMISSION - OVERHAUL .
	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 - 6F35 .
Low/Reverse clutch delayed/soft/slipping apply	Incorrect Solenoid Body Strategy programmed into TCM	REFER to SOLENOID BODY STRATEGY DOWNLOAD .
	Solenoid filter or seal damaged at SSD	REFER to MAIN CONTROL - OVERHAUL .
	SSD mechanically sticking	INSTALL a new SSD . REFER to SOLENOIDS .
	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. 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. 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 - 6F35 .
	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 - OVERHAUL .
	CBLR supply hydraulic circuit blocked or leaking	DISASSEMBLE and INSPECT the transmission cover passages for debris/blockage. CLEAN as necessary. REFER to HYDRAULIC SYSTEM - 6F35 .
	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 - 6F35 .
	Low/Reverse clutch piston seal leakage	INSTALL a new low/reverse clutch piston and seals. REFER to MECHANICAL SYSTEM - 6F35 .
Low/Reverse clutch harsh apply	Incorrect Solenoid Body Strategy programmed into TCM	REFER to SOLENOID BODY STRATEGY DOWNLOAD .
	SSD mechanically sticking	INSTALL a new SSD . REFER to SOLENOIDS .
	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. 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 - 6F35 .
	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 - 6F35 .
	Low/Reverse clutch piston return spring	INSPECT the return spring for proper installation and damage. INSTALL new components as necessary. REFER to MECHANICAL SYSTEM - 6F35 .