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Service bulletin SBU-14628

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10056452
Published by NHTSA2014-12-05
Manufacturer's numberSBU-14628
Manufacturer's date2014-09-01
NHTSA componentPOWER TRAIN:MANUAL TRANSMISSION

NHTSA's summary

CHEVROLET: THE TRIPLE CLUTCH HOUSING INTERNAL, IN TRANSMISSION, MAY DEVELOP A CRACK, LEADING TO LOSS OF REVERSE GEAR, NOISE, AND LIMITING USE, BY DRIVER, TO 3RD AND 4TH, FORWARD GEARS, IN A SMALL NUMBER OF 8 SPEED TRANSMISSIONS. MODEL 2015 CORVETTE. *PE

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Transmission and driveline, Manual transmission

Vehicles listed
CHEVROLET CORVETTE2015

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
PI1276C2021-09-07. Service bulletin. Difficult to shift into Gear, Intermittent Gear Pop Out and/or Mushy shifts (no grind)
990420002L2021-08-09. Service bulletin. This service bulletin provides information on Driveline Clunk Noise and what is acceptable and what is considered normal operation.
PI1489A2021-04-26. Service bulletin. Malfunction Indicator Lamp (MIL) Illuminated, Intermittently Unable to Shift into Reverse, DTC P0502 Set Condition/Concern Some customers may comment on a malfunction indicator lamp (MIL) illuminated. They may also comment that they intermittently are unable to shift into Reverse. When checking the vehicle for DTCs, the engine control module (ECM) may report P0502 as current or in history. This may be caused by water intrusion into the vehicle’s manual transmission output speed sensor or could be induced by the customer slipping the clutch for an extended period of time, as in holding the vehicle on a hill.
030729004L2019-05-20. Service bulletin. This informational bulletin provides normal operating characteristics and diagnostic information on Manual transmissions.
14-07-30-001E2018-05-21. Service bulletin. This informational bulletin provides technicians with information to assist in identifying operating characteristics of manual transmissions that repair attempts will not change.
03-07-29-004J2018-05-21. Service bulletin. This informational bulletin provides technicians with information to assist in identifying operating characteristics of manual transmissions that repair attempts will not change.
PIP5375E2018-05-21. Service bulletin. This Preliminary Information communication advises the technician that the rear wheel drive manual transmission restriction has ended.
PI1276B2017-08-15. Service bulletin. This preliminary informational bulletin provides a shifter assembly neutral position re-alignment procedure to correct a customer concern of difficult to shift into gear, intermittent gear pop out and/or mushy shifts (no grind).
PIP53752017-03-22. Service bulletin. THIS PRELIMINARY INFORMATION COMMUNICATION ADVISES THE TECHNICIAN REAR WHEEL DRIVE MANUAL TRANSMISSIONS HAVE BEEN PLACED ON RESTRICTION. DEALER WILL NEED TO CONTACT GENERAL MOTORS PRODUCT QUALITY CENTER FOR FURTHER ASSISTANCE.
PIP5248B2017-03-21. Service bulletin. THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN ON THE STEPS NEED TO DIAGNOSE AND REPAIR VEHICLES THAT MAY HAVE STALLING SHUDDER AND/OR HARD SHIFTING INTO 1ST GEAR OR REVERSE VIBRATION ON LAUNCH (WITH EXCESSIVE CRANKSHAFT END PLAY). TECHNICIAN WILL TEST TO DETERMINE IF THE CRANK SHAFT END PLAY IS WITHIN SPECIFICATION 0.0015–0.0086 INCH. IF END PLAY IS FOUND TO BE OUT OF SPECIFICATION, REMOVE ENGINE AND INSPECT FOR POSSIBLE CRANKSHAFT THRUST BEARING AND/OR CRANKSHAFT FOR WEAR. INSPECT THRUST BEARING FOR WEAR ON ONE SIDE AND CRANKSHAFT ON THAT “MATING” SURFACE. IF THE THRUST BEARING HAS THREE VERTICAL CHANNELS WORN OFF REPLACE CONNECTING ROD BEARINGS, MAIN BEARINGS, THRUST BEARING AND CRANKSHAFT. IF WORKING ON A CORVETTE THE OIL TANK WITH LINES AND OIL COOLER ARE BOTH REQUIRED TO BE REPLACED IF EQUIPPED.