M54 paired with a Getrag 420g

POS54 · Apr 5, 2022

I have a m54b25 na-t making around 400 crank. I am pairing this to an Getrag 420g which I just picked up and I need to order a clutch and flywheel. I know the 420g uses a different spline than the 250g that originally comes one the m54. I am thinking to use the m54 flywheel and pressure plate, and pair them with an s54/420g clutch.
I know that the 420g bolts up to the m54 so that is not an issue.
Will this work?
Are the disks the same size, even though the 420g input shaft is different?
Can I just use an s54 flywheel and clutch?
Does the M flywheel mate up to the m54 motor?

mega_stihl · Apr 14, 2022

POS54 said:
Does the M flywheel mate up to the m54 motor?

can't say for sure but pretty sure it does. A quick google search gave me the impression the 420g input shaft looks like a getrag 250 one and not the 6 speed ZF one, afaik. Or I might have clicked on the wrong image on google ofcourse.

JovaniE39 · Jul 12, 2022

Did it work out? I’m trying to do the same.

jd improved · Jul 20, 2022

The S54 flywheel, pressure plate, and clutch disc bolts up to an M54 with the getrag 420g (pilot bearing in the crankshaft).
You can also use an M54 5-speed flywheel (240mm) and S54 clutch kit.
You can't use an M54 6-speed flywheel, because it has the pilot bearing sitting in the flywheel not in the crankshaft.

M54 paired with a Getrag 420g

Top Contributors this Month

Recommended Communities