BMW gearbox identification

[shogun]

Transmission designations

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 SMG = Sequential M gearbox/transmission

GS6-37BZ (new designation according to BMW Group Standard GS 90007)
G drive
S Transmission type. S = Manual transmission. A = Automatic transmission
6 Number of forward gears
- = Standard with manual gearshift. HP = Hydraulic planetary gear
37 Transmission type. 26 = D-transmission. 31 = C-transmission. 39 = F-transmission. 37 = H-transmission. 53 = G-transmission
B Gear set. B = Petrol/gasoline gear ratio. D = Diesel gear ratio
Z Code letter of transmission manufacturer. G = Getrag. Z = ZF (Zahnradfabrik Friedrichshafen)

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

Automatic transmission:
BMW designation.----Manufacturer----Manufacturer designation-------------Remark
----A4S 200R-------------GMPT-------------------GM4
----A4S 270R-------------GMPT-------------------THM-R1w-------------Transmission wide-stepped
----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
----GS7S47BG-------------Getrag-----------------SMG-------------------Motorsport M5
http://www.kneb.net/bmw/E36-7/BMW%20...signations.pdf


http://www.kneb.net/bmw/

[632 Regal]

A4S 270R, what does "Transmission wide stepped" mean?

I cant find the gear ratios for either the 270R or the 310R

[shogun]

Here they mention under E36 GM A4S 270/310 --> ZF 5HP18 auto conversion
GM gear ratios
1st gear – 2.86
2nd gear – 1.62
3rd gear – 1.00
4th gear – 0.72
At 110km/h Final drive 3.91 – 2632rpm

ZF gear ratios
1st gear - 3.66
2nd gear - 2.00
3rd gear - 1.41
4th gear - 1.00
5th gear - 0.74
At 110km/h Final drive 3.38 - 2251rpm
http://www.bmwclubmalaysia.com/newfo...to-conversion/

A4S 270R, what does "Transmission wide stepped" mean?>>>cannot find any info.

[whiskychaser]

what does "Transmission wide stepped" mean?>>>cannot find any info.

I think it is just another word for ratio i.e. You can have a close or wide ratio transmission.

Having a wide ratio, say on first gear, can have its advantages. But when you come to a roundabout at about 15-20mph, you don't really want to be changing down to first gear. Don't know if you remember them but Vauxhall/Opel cars were like that in the '80s

[632 Regal]

And the ratios are...

Gear Ratios

1st: 2.400
2nd:1.467
3rd: 1.000
4th: 0.723
Rev: 2.000

Wide stepped:
1st: 2.860
2nd:1.620
3rd: 1.000
4th: 0.723
Rev: 2.000

We have the 310R and the gearing is higher than the stock 270R so I am guessing that chart didn't include the "wide stepped" 310R or is for a specific year

----A4S 270R-------------GMPT-------------------THM-R1w-------------Transmission wide-stepped
----A4S 310R-------------GMPT-------------------THM-R1