Was reading a recent issue of Car & Driver that had a rundown of 2012 offerings from all auto manufacturers.

For next year Buick is going to offer a "GS" (Gran Sport) version of the Regal. The GS model will come with a 270HP version of the LNF motor, and the article stated that the initial run of this model would only be available with a six speed manual. Until these hit the road, won't know if this uses the F40 RPO code, or if it is something different than the F40 - with different ratios.

The ratios of that 6 speed are as follows:
1st: 3.92
2nd: 2.04
3rd: 1.32
4th: 0.95
5th: 0.76
6th: 0.62
FD: 3.76

It does look like it a variant of the F40 since 2nd - 6th are all the same ratios, but both first and the final drive are numerically higher than the current F40 combo (1st of 3.77 and FD of 3.55). This makes 1st worse and increases the cruise RPM in 6th as well... not a transmission I will be waiting for.

ya i was on buick website yesterday looking at their trannies they had the ones that i saw were all auto 6 speeds which would be nice to have. i then looked on wiki and found out about a 6T75 that was a joint venture between ford and GM for trucks availible in 4 wheel drive, i dont know how the 4wd would be but those should be strong trannies something to look into.

http://www.buick.com/regal/...specs/equipment.html

Auto is standard, and looks like a manual is optional. Doesn't say what the RPO is, or gear ratios.

However, found this:

http://www.gminsidenews.com...ex3.html#post2323123

It suggests the ratios are what guru listed, though the FD isn't listed (or it is the 3.33). It also suggests the RPO is MR6. Searching a bit, I also found some interesting part diagrams:

http://parts.nalleygmc.com/...e/1007284G00-024.JPG

On that picture, you can clearly see "F 40" stamped on the top of the trans casing, for this MR6 RPO transmission, which seems to be in some Opels already. Given these facts, it seems plausible that you could swap the gears between the MR6 and F40, to end up with an F40 mated to an Ecotec. Also, if the FD is 3.33 instead of 3.76, it might be a useful diff swap into the F40 for some of the torquier engine swaps, to make 1st a little more useful. Would be good to get a conclusive answer on that.

Here is the link with the ratios I posted:
http://www.insideline.com/b...-gs-first-drive.html

Here is another:
http://www.automobile-catal...om/auta_details1.php

Here is a link with the automatic ratios and the final drive looks to be 3.33 for the automatic:
http://www.automobile-catal...om/auta_details1.php

A 3700lb car powered by a 2.0L Direct Injection Turbo probably will need more revs on the highway. It would be great if the final drive was a 3.33 but I do not believe it will be. Only chance we have would be if they paired the 3.6L direct injection engine with a variant of the F40... I doubt they will ever pair it with a transverse V8.

Ah, OK. A bit unfortunate that. I doubt we'll see the F40 behind a HF V6, sadly. It used to come behind the Saab 2.8t, but those have all been switched to auto-only now. And even if they did stick it behind one, we might not see a different FD ratio in it, than the F40 in the G6.

It's interesting that the ratios are the same for the MT2 F40 instead of the MU9 F40. The only differences are 1st, Rev, and FD, as well as the bell housing being behind an Ecotec. So this is an F40 with MR6 RPO, but with an even more severe 1-2 drop than the MT2/MU9 options.

(Also, guru, that second link points to a 1991 BMW 850i, which I dodn't think is what you wanted. )

quote Originally posted by dobey: (Also, guru, that second link points to a 1991 BMW 850i, which I dodn't think is what you wanted. )

Here is the main link with the manual and auto information.
http://www.automobile-catal...011-_sedan/2012.html

On this page there are buttons for the detailed specifications and I guess they use the same page to extract this information for all cars... go figure.

At least this does mean that the F40 isn't dead...

[This message has been edited by fieroguru (edited 08-14-2011).]

quote Originally posted by fieroguru: At least this does mean that the F40 isn't dead...

Indeed, though the Metric bell housing pattern pretty much is now. The last few are on their way out. However, what I really want to see is Getrag make an F90 transmission for GM. 900 Nm torque handling would be very nice. And it might have reasonable gearing too, if it was bolted to something that made anywhere near that much torque.

The new 1.4L Ecotec Turbo also has a 6 speed with nice ratios its called the M25 (i might be wrong but ill double check) It has been used in Europe and bolts to all ecotec blocks.

quote Originally posted by Younggun88: The new 1.4L Ecotec Turbo also has a 6 speed with nice ratios its called the M25 (i might be wrong but ill double check) It has been used in Europe and bolts to all ecotec blocks.

The M32 is what's in the Cruze Eco. I don't remember what the RPO for the LS model is, but it's the same transmission as the M32 with slightly different ratio.

Also, be wary about the use of "Ectoec" in Europe. It's also been used for some of the HF V6 engines over there, which are not the same bell pattern as the 4 cylinder we know as Ecotec.

EDIT: Looked up the RPOs for the Cruze M32 transmissions. The LS version is MZ0 and Eco version is MF3. Slide 34 of this sales presentation: http://www.slideshare.net/a...ani/2011-chevy-cruze

[This message has been edited by dobey (edited 08-14-2011).]