DRIVE TRAIN

Drive Train

Transaxle Assembly

REMOVAL & INSTALLATION

Manual

Fig. 1: Exploded view of the transaxle mounting-Impreza models

Before servicing the vehicle, refer to the precautions in the beginning of this section.
Remove or disconnect the following:
- Negative battery cable
- Air intake duct and cleaner case
- Air cleaner stay, if equipped
- Front Oxygen (O2S) sensor connector
- Neutral position switch connector
- Back-up light switch connector
- Vehicle Speed Sensor (VSS) connector, if equipped
- Clutch cable, if equipped
- Clutch release spring
- Starter
- Pitching stopper
- Drive belt cover
- Slave (operating) cylinder, on 2.5L engines
Install engine support assembly 927670000.
- Bolt securing the right upper side of the transaxle to the engine
- Engine under cover, if equipped
- Rear O2S sensor connector
- Front Y-pipe
- Rear exhaust pipe and muffler, on Legacy models
- Heat shield cover
- Hanger bracket from the right side of the transaxle
- Driveshaft
- Spring, and disconnect the shifter stay and rod from the transaxle
- Bolts securing the sway bar clamps to the crossmember
- Ball joints from the steering knuckle
- Halfshafts from the transaxle
- 2 nuts securing the lower side of the transaxle to the engine
Support the transaxle with a jack.
- Rear transaxle crossmember
- Transaxle from the vehicle. Move the jack rearward until the mainshaft is withdrawn from the clutch cover.
To install:
Install or connect the following:
- Transaxle assembly and secure it to the engine block
- Crossmember
Tighten the crossmember retainers to the following specifications:
1. Step 1: T1 to 40-62 ft. lbs. (54-84 Nm).
2. Step 2: T2 to 87-115 ft. lbs. (117-157 Nm).
Remove the transmission jack.
Install or connect the following:
- Nuts securing the lower portion of the engine to the transaxle and tighten to 40 ft. lbs. (54 Nm)
- Bolt securing the right upper side of the transaxle to the engine and tighten it to 40 ft. lbs. (54 Nm)
Remove the engine support.
- Drive belt cover
- Slave (operating) cylinder, on 2.5L engines
Install the pitching stopper and tighten the bolts to the following specifications:
1. Step 1: T1 to 33-40 ft. lbs. (44-54 Nm).
2. Step 2: T2 to 35-49 ft. lbs. (47-67 Nm).
Install or connect the following:
- Halfshafts into the transaxle with new roll pins
- Ball joint to the steering knuckle and tighten the bolt to 29-43 ft. lbs. (39-59 Nm)
- Sway bar to the crossmember and tighten the clamp bolts to 15-21 ft. lbs. (21-29 Nm)
- Shift control rod and stay to the transaxle and install the spring
- Driveshaft
- Heat shield cover, if removed
- Rear exhaust pipe and muffler, if removed
- Y-pipe with new gaskets and nuts
- Hanger bracket on the right side of the transaxle, if removed
- Rear O2S sensor connector
- Engine under cover, if removed
- Transaxle connectors bracket
- Drive belt cover
- Pitching stopper
- Starter
- Front O2S sensor connector
- VSS connector, if equipped
- Neutral position switch connector
- Back-up light switch connector
- Clutch cable (if equipped)
- Clutch release spring
- Air cleaner case stay and case
- Air intake duct and attach the airflow sensor connector
- Negative battery cable

Automatic

Fig. 2: Exploded view of the engine and transaxle mounts-Impreza and Legacy models

Before servicing the vehicle, refer to the precautions in the beginning of this section.
Drain the transaxle fluid.
Remove or disconnect the following:
- Negative battery cable
- Air intake duct with air cleaner case
- Air cleaner case stay
- Speedometer cable or electronic wiring connector from the speed sensor
- Front Oxygen (O2S) sensor connector
- Transaxle harness connector
- Inhibitor switch connector
- Revolution sensor connector
- Transaxle ground terminal
- Clip band that secures the air breather hose to the pitching stopper
- Starter and air intake boot
- Timing hole inspection plug
- 4 bolts that hold the torque converter to the driveplate
- Automatic Transaxle Fluid (ATF) level gauge
- Pitching stopper rod from the bracket
- Engine-to-transaxle mounting nut and bolt on the right side
- Buffer rod
Support the engine assembly with special engine support tool.
- Exhaust system
- Exhaust brackets or hangers that attach to the transaxle, as necessary
Drain the transmission fluid.
- ATF cooler hoses from the pipes of the transmission side
- ATF level gauge guide
NOTE: Matchmark the installed position of the driveshaft before removal.
- Driveshaft. Plug the opening at the rear of extension housing to prevent oil from flowing out.
- Gearshift cable from the transaxle select lever
- Stabilizer from the transverse link
- Parking brake cable bracket from the transverse link
- Transverse link bolts and lower the link
- Spring pins
- Halfshafts from the transaxle
NOTE: Discard the old spring pin and always install a new pin.
- Oil cooler hoses
Place a transaxle jack under the transaxle.
- Engine to transaxle mounting nuts
NOTE: Do not place the jack under the oil pan otherwise the oil pan may be damaged.
- Rear cushion rubber mounting nuts and the rear crossmember
Move the torque converter and transaxle as a unit away from the engine and lower it from the vehicle.
To install:
Install or connect the following:
- Transaxle to the engine and temporarily tighten the engine-to-transaxle mounting nuts
- Rear crossmember to the rear cushion rubber mounts. Align the rear cushion guide with the rear crossmember guide hole and tighten nuts.
- Rear crossmember to the chassis. Tighten the rear crossmember bolts to 39-49 ft. lbs. (53-66 Nm).
- Engine to transaxle retaining nuts to 34-40 ft. lbs. (46-54 Nm)
Remove the transaxle jack from the vehicle.
Remove the engine support tool and install the buffer rod.
Install or connect the following:
- Axle shafts to the transaxle using new spring pins
- Transverse link temporarily to the front crossmember. Do not complete final torque at this point.
- Stabilizer temporarily to the transverse link
- Parking brake cable bracket to the transverse link
- Transverse link-to-front crossmember mounting bolts and transverse link-to-stabilizer mounting bolts, with the tires placed on the ground
- Transverse link to front crossmember (self-locking nuts) to 40-62 ft. lbs. (54-84 Nm) and the transverse link to stabilizer to 18-32 ft. lbs. (24-44 Nm).
- Gearshift cable to the select lever. Be sure the lever operates smoothly all across the operating range.
- Driveshaft. Tighten the driveshaft-to-rear differential retaining bolts to 17-24 ft. lbs. (23-33 Nm) and center bearing location retaining bolts to 25-33 ft. lbs. (34-45 Nm).
- Oil cooler hoses
- Engine to transaxle bolts to 34-40 ft. lbs. (46-54 Nm)
- Starter
- Pitching stopper. Be sure to tighten the bolt for the body side first. Tightening torque for the body side bolt is 35-49 ft. lbs. (47-67 Nm). The engine or transaxle side bolt is torque to 33-40 ft. lbs. (44-54 Nm).
- Torque converter-to-driveplate mounting bolts to 17-20 ft. lbs. (23-27 Nm)
- ATF level gauge guide
- ATF cooler hoses to the pipes of the transmission side
- Timing hole inspection plug, air intake boot and air breather hose to the pitching stopper
- O2S sensor connector.
- Transaxle harness connector
- Inhibitor switch connector
- Revolution sensor connector, if equipped
- Transaxle ground terminal, on Legacy models
- Speedometer cable. Tighten the cable nut by hand, then turn it approximately 30 degrees more with a tool.
- Exhaust system and exhaust brackets or hangers that attach to the transaxle, as necessary
- Air cleaner case stay
- Air intake duct with air cleaner case
- Battery ground cable
Refill and check transaxle oil level.
Road test the vehicle for proper operation across all operating ranges.