23 Transmission Designations

WARNING: This page is about a different car, the 2010 BMW 135i, 2009 BMW 135i, and 2008 BMW 135i. However, it is still accessible from the selected car via links, so may be relevant.

Breakdown of BMW designation:

MANUFACTURER DESIGNATION

A5S 300J (old designation)
A	Transmission type	S = Manual transmission A = Automatic transmission
5	Number of forward gears
S	Type of top gear	D = Direct gear S = Overdrive gear
300	Max. input torque (Nm)
J	Code letter of transmission manufacturer	G = Getrag J = Jatco R = GMPT (General Motors Powertrain) Z = ZF (Zahnradfabrik Friedrichshafen)
SMG	Notes	SMG = Sequential M gearbox/transmission

MANUFACTURER DESIGNATION

GS6-37BZ (new designation according to BMW Group Standard GS 90007)
G	Transmission
S	Transmission type	S = Manual transmission A = Automatic transmission
6	Number of forward gears
-		- = Standard with manual gearshift HP = Hydraulic planetary gear DKG = Twin clutch transmission/gearbox
37	Transmission type	26 = D-transmission 31 = C-transmission 39 = F-transmission 37 = H-transmission 53 = G-transmission 17 = I-transmission 47= SMG 7-speed
B	Gear set	B = Gasoline gear ratio D = Diesel gear ratio S= Sport gear ratio
Z	Code letter of transmission manufacturer	G = Getrag Z = ZF (Zahnradfabrik Friedrichshafen)

Manual transmission:

MANUFACTURER DESIGNATION

BMW designation	Manufacturer	Manufacturer designation	Remark
S5D 200G	Getrag	B transmission (220/5)
S5D 200G	Getrag	B transmission (221/5)	for M41 engine only
S5D 250G	Getrag	B transmission (220/5)	Reinforced design
S5D 260Z	ZF	C-transmission (S5-31 D)	for M51 engine only
S5D 280Z	ZF	C-transmission (S5-31)
S5D 310Z	ZF	C-transmission (S5-31)	up to 9.95
S5D 320Z	ZF	C-transmission (S5-31)	from 9.95 (reinforced design)
GS5S31BZ (SMG)	ZF	C transmission	SMG
GS5-39DZ	ZF	F transmission
S6S 420G	Getrag	D-transmission (226/6)
S6S 420G (SMG)	Getrag	D transmission	SMG
S6S 560G	Getrag	E-transmission (286/6)
GS6-37BZ	ZF	H-transmission
GS6S37BZ (SMG)	ZF	H-transmission
GS6-37DZ	ZF	H-transmission
GS6-37BG	Getrag	H-transmission
GS6-53BZ	ZF	G-transmission
GS6-53DZ	ZF	G-transmission
GS6-17BG	Getrag	I-transmission
GS7S47BG (SMG)	Getrag	Transmission (247)	SMG 7-speed
GS7D36SG	Getrag	DKG436	DKG 7-speed

Automatic transmission:

MANUFACTURER DESIGNATION

BMW designation	Manufacturer	Manufacturer designation	Remark
A4S 200R	GMPT	GM4
A4S 270R	GMPT	THM-R1w	Transmission widestepped
A4S 310R	GMPT	THM-R1
A5S 300J	Jatco	Jatco
A5S 310Z	ZF	5HP-18
A5S 325Z	ZF	5HP-19
A5S 440Z	ZF	5HP-24
A5S 560Z	ZF	5HP-30
A5S 360R/390R	GM	GM5
GA6HP19Z	ZF	6HP19
GA6HP26Z	ZF	6HP26
GA6HP32Z	ZF	6HP32
GA6L45R	GM	GM6