P2 manual transmission tribulations , gearbox M56H M56L 8252142

Post by **abscate** » 19 Nov 2021, 13:01

My P2 has a wheel speed dependent bearing noise in the differential, sounds like a loose parts in a roller bearing. I’ve found nothing on rebuild kits nor rebuilding info

I’m in the hunt for a used gearbox as I will probably swap and then work on rebuilding the original

It looks more like the NA eng8ne uses the M56H with 4.25 final drive, turbos use the M56L with 4.0 final drive.

They ar efreely available in EU for $150. - 300

$3600 plus core new here.

Post by **abscate** » 19 Nov 2021, 14:53

Several recent other Fora posts about getting used m56 from Europe for $500-650 delivered , so no need to go crazy looking all over US for one.

Post by **abscate** » 21 Nov 2021, 17:39

This resource implies the M56 crosses the P80 P2 design threshold

Rvolvos · Post by **Rvolvos** » 21 Nov 2021, 18:26

You may want to buy a set of used cv axles too for your M56 , those are hard to find in the US.

Post by **abscate** » 22 Nov 2021, 01:52

Thanks RVolvos

I’ve been a lot less worried about axles with

3-6 month boot inspections
Good GKN boot kits

You can make axles live forever if you keep the dirt out

ADent · Post by **ADent** » 23 Nov 2021, 17:15

Mine is making a lot of noise too. Quiets with the clutch in at idle or using 5th gear while moving.

Luckily

my son grenaded his S70, so I pulled the tranny before scrapping. N/A, so probably different gearing.

As a bonus he just replaced the clutch with an 850R clutch, so I get a free clutch and his was one of the last cars with a single mass flywheel.

darylrobert · Post by **darylrobert** » 24 Nov 2021, 19:58

I recently heard a noticable Knocking noise after a short drive heard at idle (around once every second) i revved the engine and it went away but came back at idle, then pressed and released clutch and it went away and didnt come back. Car has New Volvo DMF clutch/TO bearing. Noise hasnt come back on recent drives. Google search of BMW forums says manual gearboxes can be noisy. Replacement M58 here is impossible.

ADent · Post by **ADent** » 08 Dec 2021, 12:02

Things rattle in idle in manual transmissions - esp as they get older and loosen up.

I have changed fluid types and it can change the gear rattle a bit.

Keep an ear out to hear if it gets worse.