4G54 Engine Identification

[Johnno]

Hi Guys,

Had a quick look at the Ultimate Topic Directory and the post "How to Read a Serial on an Astron Block".
I've got M531R12345 stamped on my block, so it looks like it is:
5 = 2.6l
3 = Silent Shaft North South
1 = Auto
R = Year of manufacture (ab '83-'84)
12345 = Serial No. (not actual)

From the other Ultimate Topic, "Wide or Narrow (Motor or gearbox)?" I found the comment that, "Out of the Mitsubishi factory auto is narrow".
Given that this engine is mated to a 5-speed out of a (GB?) Galant, does the 3rd number in the code designating Auto simply mean it is a narrow block?

Thanks.

[Sigmaproject]

All Sigma 2.6 litre auto blocks are narrow. As were all 2.0 litre blocks, manual and auto.

[A112H]

Maybe a Lancer gearbox, no RWD Galants sold here were 5 speed all 4 speeds

[Johnno]

Thanks Guys,

Engine and gearbox are in an LA Lancer. The 5-speed gearbox came from a wrecker, who said it was from a Galant, but I didn't see the donor car. I know that the 5-speed replaced the factory original 4-speed, with the gear lever position unchanged and no need to modify the centre console.

[A112H]

Pretty sure the Lancer hatch backs were 5 speed