I would change the tranny fluid and/or try the lubeguard first.
AllDataDIY is $24 for the year and has good info.
There are 2 shift solenoids 1-2, 3-4 (OD) and 2-3.
case cover removal:
Quote:
Disconnect the battery ground (negative) cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Starting and Charging.
Remove the throttle body air inlet duct. Refer to Air Cleaner Intake Duct Replacement in Powertrain Management.
Install the engine support fixture. Refer to Engine Support Fixture.
Remove the engine mount strut. Refer to Engine Mount Strut Replacement in Engine.
Raise and support the vehicle. Refer to Vehicle Lifting.
Remove the left front wheel. Refer to Tire and Wheel Removal and Installation in Steering and Suspension.
Remove the left engine splash shield. Refer to Splash Shield Replacement - Engine in Body and Frame.
Remove the stabilizer shaft links from the lower control arms. Refer to Stabilizer Shaft Link Replacement in Steering and Suspension.
Remove the left tie rod end from the steering knuckle. Refer to Steering Knuckle Replacement in Steering and Suspension.
Remove the wheel speed sensor harness connector. Refer Wheel Speed Sensor Jumper Harness Replacement (Front) in Brakes and Traction Control.
Remove the left lower ball joint from the left steering knuckle. Refer to Steering Knuckle Replacement in Steering and Suspension.
Disconnect the left drive axle from the transaxle. Refer to Wheel Drive Shafts Replacement (Left) or Wheel Drive Shafts Replacement (Right).
Secure the drive axle to the steering knuckle/strut. Caution: Failure to disconnect the intermediate shaft from the rack and pinion stub shaft can result in damage to the steering gear and/or damage to the intermediate shaft. This damage may cause loss of steering control which could result in personal injury.
Remove the pinch bolt at the intermediate steering shaft. Refer to intermediate Steering Shaft Replacement in Steering and Suspension.
Remove the intermediate shaft from the steering gear. Refer to Intermediate Steering Shaft Replacement in Steering and Suspension.
Disconnect the three-way catalytic converter pipe to the right (rear) exhaust manifold. Refer to Catalytic Converter Replacement in Powertrain Management.
Support the right side of the frame with jackstands.
Support the left side of the frame with jackstands.
Remove the transaxle mount bracket. Refer to Automatic Transmission Mount Bracket Replacement.
Remove the transaxle mount. Refer to Automatic Transmission Mount Replacement.
Loosen the engine mount lower nuts. Refer to Engine Mount Replacement (Front) and Engine Mount Replacement (Rear) in Engine.
Loosen the right side frame to body bolts. Refer to Frame Repair in Frame and Underbody.
Remove the left side frame to body bolts. Refer to Frame Repair in Frame and Underbody.
Adjust the jackstand to the lower left side of the frame.
Position the drain pan under the transaxle.
Remove the wiring harness connector.
Remove the case side cover bolts (56-58).
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This may take a whole weekend or two. I would do my research first with a manual/alldatadiy. Give lubeguard and good tranny fluid a try first = these shift solenoids are sticking due to dirty tranny fluid. If it's your only car I would maybe have a shop do the repair if that side cover needs to come off = it's a lot of work/frustration if you do it wrong and need to do it again.