FILTERS BALDWIN

Catalog Baldwinfilters for cars

Auto Parts / Transmission Identification
Code Listing
TRANSMISSION IDENTIFICATION CODE LISTING

GENERAL MOTORS AUTOMATIC TRANSMISSIONS
GM has placed labels on cars since 1984 (on trucks since early 1970's) containing Regular Production Option (RPO) families of different
vehicle areas (ex. axles, brakes, transmissions).
Locations for Label: On Automobiles On Trucks
1. Spare Tire Cover 1. Engine Compartment
2. Deck Lid 2. Glove Box
3. Right Rear Wheel Well 3. Hood
4. Rear Quarter Panel
The RPO transmission codes are listed alpha-numerically from M01 - M99 and MA2 - MY9 in the chart below.
To determine the correct transmission filter: 1. Locate the RPO code
2. Use the chart to determine the correct transmission
3. Refer to the transmission model on the following pages for proper filter

RPO OLD NEW RPO OLD NEW
M10 Isuzu 4 Spd. ME5 Allison MT653DRD ---
M13 --- 4T60-E ME6 Allison MT653DRG ---
M15 --- 4T65-E ME9 THM440 4T60
M29 THM200 --- MF1 Allison AT545 ---
M30 --- 4L60-E MH1 --- 4T80-E
M31 THM250/M31 --- MN3 --- 4T65-E
M32 THM325 --- MN4 --- 4T40-E
M33 THM350, THM375 --- MN5 --- 4T45-E
M34 THM125, THM125C 3T40 MP5 Saturn 5 Spd. ---
M38 THM350C --- MP7 Saturn 4 Spd. ---
M39 THM375 --- MS7 Geo 4 Spd. ---
M40 THM400 RWD, THM425 FWD --- MT1 THM-R1/MT1 4L80-E
M57 THM325-4L --- MT9 Allison AT542 ---
M82 --- 5L40-E MV2 THM350C ---
M84 --- 5T50E MV4 THM350C ---
M90 --- 4L40E MV9 THM200C ---
MD1 Allison 540 --- MW9 THM200-4R ---
MD2 THM180C 3L30 MX1 Geo 3 Spd. ---
MD3 THM180, THM180C/MD2 3L30 MX2 THM350C ---
MD4 THM475/M40 3L80-HD MX3 THM350C ---
MD8 THM700-R4 4L60 MX5 THM350C ---
MD9 THM125, THM125C 3T40 --- THM400 3L80
ME3 Allison MT643D --- --- THM R1 4L30-E
ME4 Allison MT643G --- --- THM A1 3T40

CHRYSLER AUTOMATIC TRANSMISSIONS

NEW CODE EXAMPLE OLD NEW
A404 30TH
E = Electronic Controls A413 31TH
4 1 T E
H = Hydraulic Controls A470 31TH
A500/MMC (A904 Front) 40RH
A500/CORP (A999 Front) 42RH
T = Transverse Front Wheel Drive A500SE 42RE
L = Longitudinal Front Wheel Drive A518 46RH
R = Rear Wheel Drive A518SE 46RE
A = All Wheel Drive A604 41TE
A604 AWD 41AE
A604 LD 40TE
Relative Torque
A606 42LE
Carrying Capacity 0 = Base Light
A618 47RH
A670 31TH
A727 36RH
3 = 3 Speed
A727 HD (Diesel) 37RH
4 = 4 Speed
A904 30RH
A998 31RH
A999 32RH
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