Extension Housing Assembly and Shim Selection - Procedure B

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6 and 2006 Chevrolet Uplander. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Pressing Outer Bearing Race Into Extension Housing

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Use the J 44908 (1) and a hydraulic press in order to install the outer bearing race to the extension housing. See Special Tools .

Fig 2: Installing Inner Bearing Race Into Extension Housing

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Use the J 44908 (1) and a hydraulic press in order to install the inner bearing race to the extension housing. See Special Tools .

Fig 3: Pressing Inner Bearing Onto Drivenshaft

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Use the J 44907 (1) and a hydraulic press in order to install the inner bearing (2) to the drivenshaft. See Special Tools .

Fig 4: View Of Drive Pinion & Extension Housing Assembly

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Install the drivenshaft (3) and NEW spacer (1) into the extension housing (2).

Fig 5: Installing Bearing Onto Shaft Using J 5590

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Use the J 5590 (1) and a hydraulic press in order to install the bearing onto the shaft.

Fig 6: Installing Extension Housing Oil Seal Using J 36797-A

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Use the J 36797-A (1) in order to install a new oil seal (2) into the extension housing (3). See Special Tools .

Fig 7: Pressing Flange Onto Extension Housing Assembly

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Lightly lubricate the splines of the drivenshaft with grease.
Install the flange (1) onto the shaft using a hydraulic press.

Fig 8: Installing Extension Housing Assembly & Bolts To J 44755

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NOTE: Refer to FASTENER NOTICE in Cautions and Notices.

Install the extension housing assembly (3) and bolts (1) to the J 44755 (2). See Special Tools .
Tighten: Tighten the bolts to 25 N.m (18 lb ft).

Fig 9: Removing Flange Nut

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Install a new nut (1) onto the shaft.
Tighten:
- Tighten the nut, with new bearings to 250 N.m (185 lb ft).
- Tighten the nut, with used bearings to 200 N.m (148 lb ft).
Remove the extension housing assembly and bolts from the J 44755 . See Special Tools .

Fig 10: Measuring Rotating Torque Of Drivenshaft

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Measure in both directions, the rotating torque of the drivenshaft. A properly assembled shaft and NEW bearings should have a rotating torque of 1.5 N.m (13 lb in). When reusing drivenshaft bearings, the rotating torque should equal the value recorded during disassembly. Tighten the flange nut as required to achieve the proper rotating torque value.

Fig 11: Measuring Dimension C

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Measure the distance between the end of the pinion and the extension housing seal surface. Record the value as dimension C.

Fig 12: Identifying 4 Digit Measured Value Etched On End Of Gear

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Determine the 4 digit value (1) on the end of the drivenshaft gear.
A comma is to be considered a decimal point. Record the value as dimension E.

Fig 13: Installing J 44757-3 Into Extension Housing

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Install the J 44757-3 (2) into the bore of the housing (1).

Fig 14: Installing J 44757-9 & Bolts To Housing

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Install J 44757-9 (3) and bolts (2) to the housing (1).
Tighten: Tighten the bolts to 25 N.m (18 lb ft).

Fig 15: Measuring Dimension D

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Measure the distance (x) between the J 44757-3 and the J 44757-9 using a feeler gage. Add the measured value (x) to 67.3 mm (2.65 in). Record the value as dimension D.
Calculate the extension housing shim thickness. Refer to Extension Housing Shim Calculation Table - Procedure B in General Specifications .