Allison Transmission Oil Change

8/3/2019 Allison Transmission Oil Change

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2006 Chevrolet Chevy K Silverado - 4WD [1GCHK33D26F258121] | Sierra, Silverado (VIN C/K) Service Manual |

Transmission/Transaxle | Automatic Transmission - Allison | Specifications | D o cu m e n t I D : 1 6 6 6 8 2 0

Oi l Pan Rep lacem ent

Remova l Procedure

1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .

I m p o r t a n t : It would be helpful to record the amount of transmission fluid lost during this

procedure. Fluid in good condition, drained into a clean container, may be reused.

2. Remove the drain plug(7) and drain plug seal(6) from the oil pan(5). Allow the fluid to

drain into a suitable container.

3. Inspect the drained fluid. Refer to Transmission Fluid Check4. Remove 12 bolts(8). Hold the oil pan in position as the last bolt is removed.

5. Remove oil pan(5) and gasket(3).

6. Inspect magnet(4). Excessive metallic particles or large metallic particles may indicate needfor overhaul or replacement of the transmission.

I m p o r t a n t : DO NOT remove the transmission internal oil filter or seal if only replacing the oil

pan or oil pan gasket.

7. Remove the transmission internal oil filter(2) by pulling straight down where the suction

tube is seated in the transmission case.8. Remove the transmission internal oil filter seal(1) from the filter or from the seal bore in the

transmission case. Discard the old seal. Discard the filter, if the filter is being replaced.

I n s t a l la t i o n Pro c ed u re

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1. Remove all gasket material from the transmission case. Remove any scratches from thetransmission case that would cause a split-line leak.

2. Place a new seal(1) on the tube of the transmission internal oil filter(2), if the filter was

removed. Be sure the seal locates against the shoulder on the internal oil filter tube.3. Push the filter(2) and seal(1) into the seal bore in the transmission case. Position the

transmission internal oil filter properly.

4. Install 2 headless guide bolts(9), M8 x 1.25, into opposite corners of the oil pan mountingface on the transmission case.

5. Place a gasket(3) on the oil pan and align the bolt holes.

6. Slide the gasket(3) and oil pan(5) over the guide bolts and hold them in place while

installing 2 bolts(8) to hold the parts in place.

Not ice : Use the correct fastener in the correct location. Replacement fasteners must be the

correct part number for that application. Fasteners requiring replacement or fastenersrequiring 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 andmay damage the fastener. Use the correct tightening sequence and specifications when

installing fasteners in order to avoid damage to parts and systems.

7. Remove the guide bolts.

8. Install the 10 remaining oil pan bolts(8).

T ig h te n

Tighten the bolts to 27Nm (20lbft).

Not ice : Refer to Component Fastener Tightening Notice in the Preface section.

9. Install the drain plug(7) and drain plug seal(6).

T ig h te n

Tighten the drain plug to 35Nm (26lbft).

10. Lower the vehicle.


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Not ice : Use only clean and approved transmission fluid.

11. Refill the transmission with DEXRONVI Automatic Transmission Fluid. Refer to Fluid

Capacity Specifications .

I m p o r t a n t : Remember fluid remains in the external circuits and transmission cavities afterdraining the transmission.

12. Check the transmission fluid level. Refer to Transmission Fluid Check .


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Allison Transmission Oil Change