GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2001 🢒 Impala 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T65-E 🢒 Accumulator and 2-1 Manual Servo Replacement

Removal Procedure
  1. Raise and support the vehicle. Lifting and Jacking the Vehicle in General Information.
  2. Remove the oil pan. Refer to Oil Pan Replacement .
  3. Remove the filter. Refer to Automatic Transmission Fluid Filter and Seal Replacement .

    4. Object Number: 164809 Size: SH
  4. Remove the accumulator attaching bolts (131) from the accumulator (132).
  5. Remove the manual 2-1 band servo cover bolts (103) from the 2-1 band servo (104).
  6. Remove the lube oil pipe (130) from the front differential carrier internal gear lube hole.

    7. Object Number: 164810 Size: SH
  7. Remove the accumulator (132) and the manual 2-1 band servo cover (104) as a assembly.

    8. Object Number: 164811 Size: SH
  8. Remove the manual 2-1 band servo (106-116).
  9. To disassemble, inspect and service the accumulator and 2 - 1 manual servo, refer to Transmission/Transaxle/Transfer Case Unit Repair Manual.

Installation Procedure

    Object Number: 164811 Size: SH
  1. Install the manual 2-1 band servo (106-116).
  2. Install the lube oil pipe (130) to the front differential carrier internal gear lube hole.

    3. Object Number: 164810 Size: SH
  3. Position the manual 2-1 band servo cover (104) and accumulator (132) into place.

    4. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  4. Install the manual 2-1 band servo cover bolts (103).

    5. Tighten
    Tighten the manual 2-1 band servo cover bolts (103) to 25 N·m (18 lb ft).


    Object Number: 164809 Size: SH
  5. Install the accumulator attaching bolts (131).

    6. Tighten
    Tighten the accumulator attaching bolts (131) to 12 N·m (106 lb in).

  6. Install the filter. Refer to Automatic Transmission Fluid Filter and Seal Replacement .
  7. Install the oil pan. Refer to Oil Pan Replacement .
  8. Lower the vehicle.
  9. Refill the automatic transmission with automatic transmission fluid.
  10. Inspect the automatic transmission for leaks. Refer to Fluid Leak Diagnosis .