[shifterboy45]

Originally Posted by Former_Boosted_IS

That is almost comical. The specs are available for both transmissions. It is very clear that the ZF Type G 6MT will be the strong one.

if you exam the tech specs for the ZFs your absolutely right.. such as:
GS6-37BZ
GS6-53BZ
which are ZF type transmissions.

but i believe the majority of those were not installed in the N54.

the current 6 speed box in the N54 is produced by GETRAG.

the only way to tell if you have either one is to look at the I.D. attached to the tranny. my bet is on GETRAG

[shifterboy45]

Originally Posted by techlogik

I would surmise that the Auto is stronger than the MT...

opinion:
fluid coupling drive system are more durable in the hands of the inexperienced. which accounts for the popularity of the automatic transmission. most people are getting from point A to point B the easiest way possible.

fact:
a well built auto transmission can survive serious horsepower/torque situations since it act as a shock absorber in the driveline, the less abrupt/more precise the gear change, the better. this offer more driver comfort and allows the driver to focus on driving.

putting a two (yes two) speed PowerGlide behind a big block producing 700 hp plus was not an uncommon thing. so autos have a history of handling horsepower..

but lack flexibility when it come to road driving ..

to handle 2500hp or more the Lenco 2spd is still the standard..

[jhbodle]

Well the 6AT in the 335i is rated to 332lb/ft of torque - they must build them solid if they are holding up under much higher loads than that. I'm still concerned about breaching that torque figure though - it's no coincidence that the BMW Power Kit has 332lb/ft on the 6AT version and no more.

[Willizm]

Originally Posted by shifterboy45

opinion:
fluid coupling drive system are more durable in the hands of the inexperienced. which accounts for the popularity of the automatic transmission. most people are getting from point A to point B the easiest way possible.

fact:
a well built auto transmission can survive serious horsepower/torque situations since it act as a shock absorber in the driveline, the less abrupt/more precise the gear change, the better. this offer more driver comfort and allows the driver to focus on driving.

putting a two (yes two) speed PowerGlide behind a big block producing 700 hp plus was not an uncommon thing. so autos have a history of handling horsepower..

but lack flexibility when it come to road driving ..

to handle 2500hp or more the Lenco 2spd is still the standard..

Very true, even in the fbody scene it's not uncommon for guys to switch from MT to AT and build the AT's to handle serious HP/Tq. Coupled with a nice high stall torque converter they are deadlier on the track then an experienced MT driver. Both transmissions in the fbodies have their breaking points and both can be built to handle higher HP/Tq. If anything the auto's have a higher utilization with the serious drag strip guys even though it is a little more boring than driving a 6 speed. to each their own. i drive both so there are pros and cons.

[techlogik]

Originally Posted by Former_Boosted_IS

That is almost comical. The specs are available for both transmissions. It is very clear that the ZF Type G 6MT will be the strong one.

Not comical, I never bothered to research the tranny and specs.

Auto transmissions are used for high horsepower applications, if built correctly. The DSG type of transmissions today have taken more of a front seat lately with many companies, particularly, German makers/Euro.

Based on many well known manufacturers models of AT and manuals transmissions put in the same car, many cases gave the power advantage to the ATs.

How much power exactly can each hold then in torque? Comparison? Post a link to the specs please.

[Former_Boosted_IS]

Originally Posted by techlogik

Not comical, I never bothered to research the tranny and specs.

Auto transmissions are used for high horsepower applications, if built correctly. The DSG type of transmissions today have taken more of a front seat lately with many companies, particularly, German makers/Euro.

Based on many well known manufacturers models of AT and manuals transmissions put in the same car, many cases gave the power advantage to the ATs.

How much power exactly can each hold then in torque? Comparison? Post a link to the specs please.

The 6MT is listed at the ZF Type G. That tranny is used in the M5/6.

carmodel eng tq trans tq trans type
---------------------------------------------------------
318i-6MT 180NM ??? GETRAG I
318i-6AT 180NM 400NM ZF 6HP19
320i-6MT 200NM ??? GETRAG I
320i-6AT 200NM 400NM ZF 6HP19
325i-6MT 250NM ??? GETRAG I
325i-6AT 250NM 400NM ZF 6HP19
318d-6MT 280NM ??? ZF type H(weit)
330i-6MT 300NM ??? GETRAG H
330i-6AT 300NM 400NM ZF 6HP19
530i-6MT 320NM ??? ZF type H
530i-6AT 320NM 400NM ZF 6HP19
320d-6MT 340NM ??? ZF type H(weit)
320d-6AT 340NM 400NM ZF 6HP19
335i-6AT 400NM 450(530)NM ZF 6HP19 TU/21
335i-6MT 400NM ??? ZF type G
325d-6MT 400NM ??? ZF type G
325d-6AT 400NM 450(530)NM ZF 6HP19 TU/21
M3 -7AT 400NM 600NM GETRAG M DCT
M3 -6MT 400NM ???
M3 -6AT 400NM ???
550i-6AT 490NM 700NM ZF 6HP26 TU/28
550i-6MT 490NM ??? ZF type G
530d-6AT 500NM 700NM ZF 6HP26 TU/28
330d-6MT 500NM ??? ZF type G(weit)
330d-6AT 500NM 600NM ZF 6HP26
M5 -SMG 520NM 550NM Getrag SMG III/7AMI550
M5 -6MT 520NM ??? ZF type G
535d-6AT 580NM 700NM ZF 6HP26 TU/28
335d-6AT 580NM 700NM ZF 6HP26 TU/28
(from E60/E90 ACEA Technik 0307, Getrag, BMW)

Notice it doesn't list the torque specs for the 6MT tranny itself though, but only the car.

[scrufy]

Either transmission will handle a JB3/V4, Filter(s), DP, Intercooler with no issues as have been proven here on many, many posts, and by many, many people. The AT is faster at the 1/4 mile and from a dig to about 80, then the MT supposedly catches up (I have yet to see that last part in my AT though The AT shifts Faster than you can in an MT (debatable) but the main reason for this is the final drive ratio for the AT favors the lower end. Once your around 100 or so, the MT has the better ratio.
To answer the OP:
Nuff Said...

[jhbodle]

Originally Posted by scrufy

Either transmission will handle a JB3/V4, Filter(s), DP, Intercooler with no issues as have been proven here on many, many posts, and by many, many people. The AT is faster at the 1/4 mile and from a dig to about 80, then the MT supposedly catches up (I have yet to see that last part in my AT though The AT shifts Faster than you can in an MT (debatable) but the main reason for this is the final drive ratio for the AT favors the lower end. Once your around 100 or so, the MT has the better ratio.
To answer the OP:
Nuff Said...

True, but I don't think we really know the longevity of these transmissions yet with all that extra torque. Not that many high mileage 335s going around with tunes from day 1 yet...

[MSimeon]

honestly....who gives a shit.....pick whatever transmission you want. it's just for some people (including me), manual is more fun. but if youre based on 1/4 mile times, all the more power to you. A ferrari with a flappy paddle gearbox may be faster, but i'd never buy one with it.

[jhbodle]

Originally Posted by MSimeon

honestly....who gives a shit.....pick whatever transmission you want. it's just for some people (including me), manual is more fun. but if youre based on 1/4 mile times, all the more power to you. A ferrari with a flappy paddle gearbox may be faster, but i'd never buy one with it.

I think i'm one of the few people that enjoy both - I would quite happily own either (and have). Although I think the AT is more of a novelty in the UK as everything normally has a manual gearbox.

[shifterboy45]

Originally Posted by Nick.CBR

Drove my buddy's 6MT E92 M3 the other day. It was fun but I'd still get the DSG 'box hands down. I love both autos (esp. double clutch ones) and manuals but even the manual transmission purists should give the new automated manuals the respect they deserve. Zero missed shifts and consistancy that can't be replicated by a human under identical condiditons.

Flame away...

Nick

driven auto, SMG,6MT, and the almost flawless DCT in the 335is
your definitely right, they are in a league of there own..

but if youre in stop n go traffic, like here in SoCal it get so boring after awhile
(much longer for the new DCT)... but when you switch gear its done, no feathering the clutch or trail braking w/ a little heel-toe action

even the guys at the port, who race -- choose the 6MT all day long