Suzuki XL7 2007 Service Manual page 1583

Slips in Reverse or No Reverse
Condition
DEFINITION: Slips in reverse or no reverse
Fluid Level Low and/or
Contaminated or unit filled with the
wrong type of fluid
Torque Converter (1)
Low System Line Pressure
Fluid
Fluid Pump (2)
Torque Converter (1)
Fluid Filter (42)
Internal Transmission Concerns
External Control Valve Body Assembly (39)
• Line Pressure Control Solenoid
Valve Assembly (SLT) (316)
• Reverse, 1st Shift Solenoid Valve
Assembly (S1) (310)
• 2-3, 3-4 Shift Solenoid Valve
Assembly (S2) (308)
Internal Control Valve Body Assembly (39)
• Primary Regulator Valve (395)
• Check Valve (360)
• Manual Valve (337)
• M1 Shift Valve (389)
• M2 Shift Valve (426)
• U1 Shift Valve (386)
• Line Pressure Control (SLT)
Accumulator Piston (433)
Clutch - Mechanical/Hydraulic
Forward (C1) Clutch
Low and Reverse Clutch Piston
Assembly (27)
1-2 Reverse (B5) Clutch Assembly Remove the transmission case cover and 1-2 reverse clutch assembly (B5)
Inspect fluid level and color. Perform a fluid level inspection and make sure that
the fluid does not smell burnt, and shows no sign of coolant cross
contamination. If unable to determine if the transmission has the correct type of
fluid, drain the unit and refill with the correct fluid and retest.
Internal concern, diagnose the cause of the concern and correct as necessary.
Replace the torque converter assembly.
Low fluid level, perform fluid level check and correct as needed.
Internal fluid pump (2) concern, diagnose fluid pump assembly and repair or
replace assembly as necessary.
Internal concern, diagnose the cause of the concern and repair as necessary.
Replace the torque converter assembly.
Fluid filter (42) restricted. Diagnose the cause of the restriction and repair as
necessary and replace the filter assembly.
Internal fluid leak, perform system air checks and repair as necessary.
Verify that all solenoids respond electrically. If there is no response, perform an
electrical diagnosis. If there are no electrical concerns, remove the solenoid
valve assembly as needed, and inspect the solenoids O-ring seals, and bores
for signs of damage and/or missing seals. If the valves responded electrically
and there are no bore or seal concerns, replace assembly as required due to a
possible internal mechanical concern and retest. If after replacing the valve
assembly in question, a concern is still present, replace the complete control
valve body assembly (39).
Remove the control valve body assembly to inspect the items listed. Inspect
internal bores and valves for signs of wear and/or damage, including internal
contamination. If unable to verify a repairable concern, replace the complete
valve body assembly.
Remove the transmission case cover and 1-2 reverse clutch assembly (B5) (19)
and the forward and direct clutch assembly (23). Inspect all forward clutch (C1)
components and operation. Repair as necessary.
Remove the transmission case cover and 1-2 reverse clutch assembly (B5)
(19), the forward and direct clutch assembly (23), the front internal gear and low
clutch sprag (F2) assembly (25), and the low and reverse clutch plates and disc
assembly (B3) (26). Inspect the low and reverse clutch piston (27) and related
components for proper operation. Repair as necessary.
(19). Inspect all 1-2 reverse (B5) clutch components and operation. Repair as
necessary.
Automatic Transmission:
Action
5A-173