Low/Reverse Clutch System

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

For low/reverse clutch operation, refer to Hydraulic System - 6F35 or Mechanical System - 6F35 .

Courtesy of FORD MOTOR COMPANY

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	7D402	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 .