File in Section:

-

Bulletin No.:

Service Bulletin

16-NA-014

Date:

January, 2016

TECHNICAL
Subject:

Delayed Engagement After Sitting With Engine Off

Attention: This Bulletin also applies to any of the models that may be Export vehicles.
Model Year:

VIN:

Engine:

Transmission:

Brand:

Model:

from

to

Cadillac

Escalade

2015

2016

8L45 or 8L90

Cadillac

Escalade
ESV

2016

2016

8L45 or 8L90

Cadillac

ATS

2016

2016

8L45 or 8L90

Cadillac

CTS

2016

2016

8L45 or 8L90

Chevrolet

Corvette

2015

2016

8L45 or 8L90

Chevrolet

Silverado

2015

2016

8L45 or 8L90

GMC

Sierra

2015

2016

8L45 or 8L90

from

to

GMC

Yukon

2015

2016

8L45 or 8L90

GMC

Yukon XL

2015

2016

8L45 or 8L90

Condition

Some customers may comment on a condition of delayed engagement when the
transmission is shifted from Park to Reverse or Park to Drive after the vehicle has been
sitting with the engine off. This condition may typically occur after several hours or more
commonly overnight.
Customers may describe this condition as the vehicle not wanting to move or feeling like
the transmission is slipping when first trying to move the vehicle. Operation will be normal
and the condition will not occur until the vehicle sits again with the engine off for several
hours or overnight.

Correction
Install a new stator shaft support assembly that
includes an additional check ball. Follow the
instructions below to replace the stator shaft support
assembly.

Service Procedure
1. Remove the transmission from the vehicle and
mount to the DT-48989 transmission holding
fixture. Refer to Transmission Replacement in SI.
2. Remove the 15 bolts (1) securing the fluid pan and
gasket to the transmission.

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Copyright 2016 General Motors LLC. All Rights Reserved.

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January, 2016

Note: The fluid pan gasket is reusable. Inspect the
gasket to determine if it may be reused. If the gasket is
stuck to the case or pan, it should be replaced.
3. Remove the fluid pan (2) and gasket (3). The fluid
filter does not need to be removed.

Bulletin No.: 16-NA-014

6. Remove the 11 front cover bolts (1). Discard the
bolts. The bolts have a dry sealant on them and
may only be used once.
Note: There are 2 different front cover configurations.
Early design front covers have 3 threaded holes for
service, late design front covers have 2 threaded holes.
•

7.
8.
9.
10.
11.

Use two GE-6125-1B slide hammers and
DT-51791 slide hammer adapters in the
threaded holes of the front cover to remove it
from the case for applications with 3 threaded
holes.
• Use the GE-8433 puller bar and 2 bolts in the
threaded holes of the front cover to remove it
from the case for applications with 2 threaded
holes.
Remove the front cover (2) and seal (3). Inspect
the seal and replace if worn or damaged.
Remove the drive sprocket (5).
Remove the drive link assembly (6).
Remove the front support cover gasket (8). Discard
the gasket.
Inspect the front (4) and rear (7) drive sprocket
thrust washers. Replace if worn or damaged.

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4. Using the DT-48285 Torx Plus socket, remove the
two fluid baffle bolts (1) and fluid baffle (2). Discard
the bolts.
Note: The driven sprocket locking tab is located on the
back of the sprocket. Rotate the sprocket as shown and
simultaneously pull back and up on the tab to release
the retainer.
5. Remove the driven sprocket (3) from the oil pump
shaft leaving the drive link (chain) loose in
the case.

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12. Remove the turbine shaft O-ring seal (1). Discard
the seal.
13. Remove the nine stator shaft support bolts (2).
14. Remove the stator shaft support assembly (3).

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Bulletin No.: 16-NA-014

January, 2016

Page 3

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Legend
(A)

Old stator support asm 24274636/
24275106/24272656

Note: The new stator shaft support assembly has a
second check ball (1) added (see illustrations).

(B)

New stator support asm 24277234

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January, 2016

Bulletin No.: 16-NA-014

Caution: Size the converter fluid seal ring for at least
5 minutes after installation to obtain proper seal ring
size. Failure to do so may cause internal transmission
leaks and transmission damage.
Note: Use the large taper side of DT-50912-1 Seal
Sizer for initial seal sizing, then flip the tool over for final
sizing. The DT-50912-1 seal sizer works for both the
8L90 and 8L45.
15. Using the DT-50912 Seal Installer (8L90) or
DT-51196 Seal Installer (8L45), install a NEW
torque converter fluid seal (1) on the stator shaft
support assembly. Size the seal using the
DT-50912-1 Seal Sizer.
16. Install 2 NEW 1-3-5-6-7 Clutch Fluid Seal
Rings (2).

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January, 2016

Page 5

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Note: Align the bolt hole indicated by the arrow with
the arrow that is cast into the case and push down
to seat.
17. Install the NEW stator shaft support assembly (1).
18. Install the nine stator shaft support bolts (2).
Tighten the bolts in the sequence shown. Tighten
the bolts to 31 Y (23 lb ft).
19. Install a NEW turbine shaft O-ring seal (3).

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January, 2016

Bulletin No.: 16-NA-014

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Legend
(A)

Old cover 24272660

(B)

Note: The casting void has been eliminated from the
underside of the cover (see illustration).

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New cover 24277964

20. Using the DT-43772 Torque Converter Seal
Installer, install a NEW torque converter fluid seal
(1) on the front cover.

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January, 2016

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21. Install a NEW front support cover gasket (1).
22. Install the (rear) drive sprocket thrust washer (2) on