m42+ e36 m3 trans install questions...

[Gear_Head13]

Is anyone running this set up for there transmission? If so when I installed the gearbox I had a weird situation where it wouldn't slip snug to the back of the motor (about 1/4" gap from bell housing to block) just curious if anyone else had this happen or if I'm being paranoid.

Thanks for looking

[Massimo]

I have heard this can be done but do not know of anyone who has. Unfortunatly I can't help you but can you please post up a lessons learnt some pics and anything else once you are done I am sure there are a few people who want to know how easy/hard this is.

Cheers.

[Nairb]

m42club would be another great resource.. never heard of this being done, but if it works you're going to have to do a killer write-up!

[blalor]

I'd absolutely be interested in hearing more about this mod.

[Gear_Head13]

Ok ill finish the car up & see what happens :D

[KenC]

You think the input shaft is hitting the crank?

[Gear_Head13]

No I'm thinking more of the pilot bearing or the throw out bearing. The trans did finally mate to the block but I had to "walk" it in with the bolts. I've never had a trans need that & I'm just curious if I'm making a big deal out of nothing.

[KenC]

If you don't lube up the input shaft it's hard to press into the pilot bearing.

Any benefits to the e36 m3 tranny over the 240?

[Massimo]

If you don't lube up the input shaft it's hard to press into the pilot bearing.

Any benefits to the e36 m3 tranny over the 240?

Well it is stronger for a start. There gears I believe are shorter so you need to swap in a lower ratio diff. That is about it. But for anyone running high hp it is a strong direct replacement for the 240.

[Hey-U]

Might be usefull. I think I found this on M42 Forum

M20b25 lightweight flywheel,
Custom paddle clutch
Getrag S6S 420G gearbox (E46 M3 6-speed manual)
z3M shortshifter
4.10LSD (188 case)

Getrag 240 65 LB

Getrag 260
availability: e30 325, ?
strength:
ratios:3.80 (1), 2.2 (2), 1.40 (3), 1.00 (4), .81 (5).
feel:
weight: 33.8 kg 74.5 LB

6 Speeds
m42 gearbox weight 29kg and 400g. a m3 3,2 6speed gearbox weight 46kg.

Getrag 420 (s6s-420g)
availability: e36 s50b32, e46 s54b32
strength:
ratios:4.23 (1), 2.51 (2), 1.67 (3), 1.23 (4), 1.00 (5), .83 (6).
feel:
weight: 45.3 kg 99.9 lb

ZF GS6-37BZ(ZF type H)
availability: e46 330, e60 530, e85 z4m
strength:
ratios: 4.35 (1), 2.50 (2), 1.66 (3), 1.23 (4), 1.00 (5), 0.85 (6).
feel:
weight:

[Gear_Head13]

Ok I'm still looking for advice on my swap, main issue is what slave cyl to use!

I tried using a e36 325i slave & blew out the seal. So I'm guessing the rods travel is too short hence why it came out of the housing. So if anyone has some specs on slave cyl please help me out. Would like to have this problem sorted before I dump a grip of cash into a mod'ed driveline.