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Service bulletin 166599R

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 id613408
Published by NHTSA2000-07-13
Manufacturer's number166599R
Manufacturer's date2000-03-17
NHTSA componentPOWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)

NHTSA's summary

CUSTOMER COMPLAINT THAT THE A/T TEMPERATURE LIGHT FLASHING AND CODE 38 FOUND IN THE TCM. *TT

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, Automatic transmission, Transmission control module

Vehicles listed
SUBARU FORESTER1999, 2000
SUBARU IMPREZA1999, 2000
SUBARU LEGACY1999, 2000

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
166399R2023-04-17. Service bulletin. Remanufactured Automatic Transaxle Program
03-70-12R2017-01-31. Service bulletin. REPAIR PROCEDURE FOR HIGH-PITCHED SOUND FROM EXTENSION HOUSING AREA USING LATEST GENERATION PRODUCTION PARTS - THIS BULLETIN PROVIDES PRODUCTION CHANGE, REPAIR PROCEDURE AND PARTS INFORMATION TO ADDRESS A CUSTOMER CONCERN OF A HIGH-PITCHED SOUND COMING FROM THE TRANSMISSION EXTENSION HOUSING AREA.
03-70-12R2016-09-14. Service bulletin. THIS BULLETIN PROVIDES PRODUCTION CHANGE, REPAIR PROCEDURE AND PARTS INFORMATION TO ADDRESS A CUSTOMER CONCERN OF A HIGH-PITCHED SOUND COMING FROM THE TRANSMISSION EXTENSION HOUSING AREA. IN COLD TEMPERATURES, THERMAL CONTRACTION CAUSES SHRINKING OF THE TRANSMISSION CASE. IN HIGH TEMPERATURES, EXPANSION OF THE CASE OCCURS. THESE TEMPERATURE CHANGES AFFECT THE AMOUNT OF PRELOAD ON THE TRANSFER DRIVEN SHAFT BEARINGS. IN SOME RARE CASES, WHEN PRELOAD IS VERY NEAR THE LIMIT OF SPECIFICATION COMBINED WITH UNUSUAL DRIVING CONDITIONS, THIS THERMALLY-INDUCED PRE-LOAD CHANGE MAY CAUSE DAMAGE TO THE BEARINGS AND RESULT IN THE SOUND HEARD BY THE CUSTOMER. A CHANGE HAS BEEN MADE TO THE EXTENSION CASE AND A NEW “DISH PLATE” ADDED. THE MACHINING DEPTH OF THE EXTENSION CASE HAS BEEN INCREASED TO ACCOMMODATE THE NEW DISH PLATE. WHEN USED ALONG WITH A SELECTIVE THRUST WASHER, THE SPRING TENSION OF THE DISH PLATE HELPS TO MAINTAIN A CONSISTENT AMOUNT OF PRE-LOAD ON THESE BEARINGS THROUGHOUT VARYING TEMPERATURE CONDITIONS.
1665992000-05-05. Service bulletin. SOME CUSTOMERS MAY COMMENT ABOUT THE A/T TEMPERATURE LIGHT FLASHING AND CODE 38 FOUND IN THE TCM. *TT
20002000-04-17. Service bulletin. THIS BULLETIN MENTIONS IF YOU HAVE A 1999MY OR LATER VEHICLES WITH THE NEW (SECOND GENERATION) 4EAT AND ARE DIAGNOSING A CODE FOR A DUTY SOLENOID, CHECK THE TRANSMISSION OIL PAN FOR ANY DENTS. *TT
WXM701999-01-06. Service bulletin. SUBJECT ON TRANSMISSION CONTROL MODULE SHIFT LOGIC. *YC