AUTOMATIC TRANSMISSION IDENTIFICATION INFORMATION
MODELS/YEARS 1986 MODELS
This information is intended to assist technicians in understanding the transmission identification (I.D.), its meaning, and where it is located on currently manufactured THM automatic transmissions. This information replaces similar information published in Service Manual Section OA.
The transmission identification tag or stamped identification contains such information as transmission type, model year, model, serial number, and Julian date.
Refer to the following information and illustrations which will help explain all transmission identifications:
EXPLANATION OF ALL KEY TRANSMISSION IDENTIFICATIONS
MODEL YEAR: Tells what model year the transmission was built.
MODEL: Beginning with the start of 1986 production, all THM transmissions have a 3-letter model designator as opposed to the 2-letter model designator used in previous years. The third letter in each code group will identify the type of transmission as follows:
TYPE OF THIRD LETTER OF TRANSMISSION CODE G ROUP
125C C 200C B 200-4R F 440-T4 H
JULIAN DATE: Tells what day of the year the transmission was built. It is also important to remember that the transmission model year starts MID YEAR. This means the first transmission built in any model year will start with a higher Julian date.
EXAMPLE: IF THE FIRST TRANSMISSION IN 1986 WAS BUILT ON AUGUST 5, THEN THE JULIAN DATE STARTS AT 217 AND GOES TO 365 (DECEMBER 31). THE JULIAN DATE WILL THEN DROP TO 001 (JANUARY 1) AND CONTINUE TO 216 (AUGUST 4, 1987).
SERIAL NUMBER:Tells what sequence the transmission was built.
SHIFT BUILT: Tells what shift the transmission was built.
Also included in this builetin is a chart listing transmission and transaxle usage for 1986 models. This replaces the chart located in Section OA of the 1986 Chassis Service Manual.
1986
TRANSMISSION USAGE CHART
CAR TRANS. SERIES ENGINE CODE MODEL ------ ------ ---- ----- G Series 3.8L, LD5, V-6 (VIN A) 6BHB MV9(200C) 5.0L, LV2, V-8 (VIN Y) 6KBB/6KAB MV9(200C) 5.0L, LV2, V-8 (VIN Y) 6KCF/6KBF MW9(200-4R) 5.0L, LV2, V-8 (VIN 9) 6KZF MW9(200-4R)
BSeries 5.0L,LV2,V-8 (VIN Y & GU2) 6KCF MW9(200-4R) 5.0L,LV2,V-8 (VIN Y & GU4 or GU5) 6KJF MW9(200-4R)
TRANSAXLE USAGE CHART
CAR SERIES ENGINE TRANS. CODE MODEL ------ ------ ----------- ----- J Series 1.8L,LH8,L-4 (VIN O) TZD/5ZDZ MK7 (5SMT) 1.8L,LH8,L-4 (VIN O)w/F75 6PHC MD9 (125C) 1.8L,LH8,L-4 (VIN O)w/FW9 6PJC MD9 (125C) 2.0L,LQ5,L-4 (VIN P)w/GY5 5RN/5SBN Ml9 (4SMT) 2.0L,LQ5,L-4 (VIN P)w/F25 5NU M19 (4SMT) 2.0L,LQ5 L-4 (VIN P)w/F75 6CBC MD9 (125C) 2.0L,LQ5,L-4 (VIN P)w/FW9 6CAC MD9 (125C) 2.8L,LB6,V-6 (VIN W) SSF MX6 (4SMT) 2.8L,LB6,V-6 (VIN W) 6CJC MD9 (125C)
N Series 2.5L,L68,L-4 (VIN U) 5ZF MT2 (5SMT) 2.5L,L68,L-4 (VIN U) 6PNC MD9 (125C) 3.0L,LN7,V-6 (VIN L)w/F17 6BPC/6BDCW MD9 (125C) 3.0L,LN7,V-6 (VIN L)w/F75 6BCC/6BAC MD9 (125C)
A Series 2.5L,LR8,L-4 (VIN R) w/F62 6PWC MD9 (125C) 2.5L,LR6,L-4 (VIN R) w/F17 6PDC MD9 (125C) 2.8L,LE2,V-6 (VIN X) 6CLC MD9 (125C) 2.8L,LE2,V-6 (VIN X) 6HJH ME9 (440-T4) 2.8L,LB6,V-6 (VIN W) w/F17 6CTC MD9 (125C) 2.8L,LB6,V-6 (VIN W) w/F75 6CXC MD9 (125C) 2.8L,LB6,V-6 (VIN W) 6CMH/6CFH ME9 (440-T4) 3.8L,LN3,V-6 (VIN 3) 6BCH ME9 (44OT4)
H Series 3.0L,LN7,V-6 (VIN L) 6BHH ME9 (440-T4) 3.8L,LG2,V-6 (VIN B) 6BPH ME9 (440-T4) 3.8L,LG3,V-6 (VIN 3) w/FP3 6BBH ME9 (440-T4) 3.8L,LG3,V-6 (VIN 3) w/F17 6BDH ME9 (440-T4)
C Series 3.8L,LG2,V-6 (VIN B) w/F17 6BAH ME9 (440-T4) 3.8L,LG2,V-6 (VIN B) w/T2T 6BMH ME9 (440-T4) E Series 3.8L,LG2,V-6 (Vin B) 6BZH ME9 (440-T4)
General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.
