Pontiac 12654640 Automatic Transmission Flexible Plate Assembly

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Raise the vehicle and support it securely on jack stands, then remove the transmission. Mark the relationship between the driveplate and the crankshaft with a marker or similar device, then remove the bolts that secure the driveplate to the crankshaft. If the crankshaft turns, wedge a screwdriver in the ring gear teeth to jam the driveplate. Remove the driveplate from the crankshaft. Since the driveplate is fairly heavy, be sure to support it while removing the last bolt. Clean the driveplate to remove grease and oil. Inspect the surface for cracks, and check for cracked and broken ring gear teeth. Lay the driveplate on a flat surface to check for warpage. Clean and inspect the mating surfaces of the driveplate and the crankshaft. If the rear main oil seal is leaking, replace it before reinstalling the driveplate. Position the driveplate against the crankshaft. Be sure to align the marks made during removal. Note that some engines have an alignment dowel or staggered bolt holes to ensure correct installation. Before installing the bolts, apply thread locking compound to the threads and place the retaining ring (if equipped) in position on the driveplate. Wedge a screwdriver through the ring gear teeth to keep the driveplate from turning as you tighten the bolts to the torque specifications. If the transmission front pump seal/o-ring is leaking, now would be a very good time to replace it. The remainder of installation is the reverse of removal.

Raise the vehicle and support it securely on jack stands, then remove the transmission. Mark the relationship between the driveplate and the crankshaft with a marker or similar device, then remove the bolts that secure the driveplate to the crankshaft. If the crankshaft turns, wedge a screwdriver in the ring gear teeth to jam the driveplate. Remove the driveplate from the crankshaft. Since the driveplate is fairly heavy, be sure to support it while removing the last bolt. Clean the driveplate to remove grease and oil. Inspect the surface for cracks, and check for cracked and broken ring gear teeth. Lay the driveplate on a flat surface to check for warpage. Clean and inspect the mating surfaces of the driveplate and the crankshaft. If the rear main oil seal is leaking, replace it before reinstalling the driveplate. Position the driveplate against the crankshaft. Be sure to align the marks made during removal. Note that some engines have an alignment dowel or staggered bolt holes to ensure correct installation. Before installing the bolts, apply thread locking compound to the threads and place the retaining ring (if equipped) in position on the driveplate. Wedge a screwdriver through the ring gear teeth to keep the driveplate from turning as you tighten the bolts to the torque specifications. If the transmission front pump seal/o-ring is leaking, now would be a very good time to replace it. The remainder of installation is the reverse of removal.

Clean the inboard face of the flywheel and the crankshaft speed/position sensor.

If the spacer is stuck, insert bolts (M11x1.5 mm) into the two threaded holes in the spacer.

Use a screwdriver to prevent the driveplate from turning while tightening the bolts to the specified torque.

Avoid disassembling the driveplate assembly, as it is balanced as a unit.

Wedge a screwdriver through the ring gear teeth to prevent the driveplate from turning while tightening the bolts in a criss-cross pattern to the specified torque.

If the spacer is stuck, M11 bolts that are 1.5 mm long should be inserted into the two threaded holes in the spacer. Tightening these bolts will help force the spacer off the crankshaft.

Inspect the surface for cracks and check for cracked and broken ring gear teeth.

Tightening the bolts will force the spacer off the crankshaft.

Apply thread-locking compound to the bolt threads and place the retaining ring if equipped.

Mark the relationship between the driveplate and the crankshaft with a marker or similar device.

Raise the vehicle and support it securely on jack stands.

Raise the vehicle and support it securely on jackstands, then remove the transmission.

No, the driveplate replacement for V8 engines follows the same procedure as for V6 engines, utilizing the specified torque figures.

Wedge a screwdriver in the ring gear teeth to jam the driveplate.