Google has failed me and I have not received anything back from my form entry "contact us" at GM Powertrain. I've been talking with Houseman custom transmission systems (with alot of help from Will) on getting some changes made to the F40 transmission to make 1st and 2nd a bit more "usable" (namely for strip purposes), along with some other tweaks.

However they requested some technical drawings/schematics of the transmission (or just 1st and 2nd gear) before we get started. Does anyone have access to these, or know where I can find them?

Trinten, I just answered your other thread, but for this, you might get better results if you make the request directly to Getrag, in Germany. My local guy just disassembled my F40, counted all the teeth, measured everything, including the angles of the teeth, then reassembled it, and gave it back. I hand-tested it in every gear, it seems he got it back together correctly. I asked what was next, and he said he'd be putting the info into some CAD/cAM program, and a few days later he told me he thinks he can do a 2.98:1 first. I asked him if it'd be any cheaper to do the prototype out of cardboard, and while it would be cheaper, it wouldn't survive a test-mockup, we may try starting with aluminum. We're on hold as I'm out of money.

Hey Isolde!

I saw your reply and replied. heh. I started this thread since it was on something more specific, thought it might be appropriate to do so.

So Getrag was still the designer of the F40? I did not know that! I'll see if I can find some contact info for them and drop them an email as well!

If I am mistaken about Getrag, then it was ZF, but I am 100% sure the F40 is a German design.

Well Isolde, you were right about Getrag designing the transmission. I got a response back from them today... basically they apologized saying that they can't give me any technical drawings or schematics because of their NDA with their customers. :/

So it looks like at this point I'd have to buy the transmission and ship it up to Canada and let them take it apart and play with it, to find out if they can get done what I want and find out a final price.

I'll ask my guy about sending you what he got from my F40 for his CAD/CAM program

That would be fantastic! I really appreciate it!

I haven't had any success yet, I'll go see him in person, middle of next week.

Today I'm going to ask. stay tuned! Same bat time, same bat channel :-)

Don't worry, I'm still tuned in and standing by!

I think you should pull the parts yourself and send the appropriate shafts and gear to Houseman. Let's just say that past experience tells me Houseman designs and produces gears, but doesn't assemble gearboxes...

[This message has been edited by Will (edited 08-04-2009).]

Hi Will!

Well, I suppose that's always a possibility, though I'd probably need to take it to a transmission shop and ask them to pull that stuff out for me (I'd have no idea what I was looking at once I got the cover off), then just have that same shop put it all back together for me once I get the new gears back from Houseman?

Take the cover off and put it on your kitchen table (or as close as your wife will let you). Play with it for 1/2 hour every night for a week. Manually move the shift collars and shift linkage. Figure out which gears are transmitting power for 1st, 2nd, etc. You'll understand it before too long.

[This message has been edited by Will (edited 08-04-2009).]

I'm sorry to have to report I haven't had any success yet, but I'll be staying in the city until Tuesday, so I'll try again before heading home. Will may have the best idea, my guy is being flaky. I've been inside my Fiereo's original Muncie, but I'm not ready to go inside my new F40.

My guy isn't being flaky, he's in jail.

Whoa!

Well... that's not good! lol

Thanks for trying just the same, looks like I'll have to try it out Wills way, and hopefully not break anything... :/

I wonder if there's a Helms manual out on these transmission that has detailed enough drawings...

Back in '04ish, I swung through a dealership and looked at the info they had for overhauling the Saab version of the transmission, which should be internally identical to the Pontiac version. The info's out there... Also consider Aldata. Helm lists paper manuals for the '06 G6, for instance.

Fantastic! I'll have to track down those books/manuals and then send off the stuff to Houseman - and keep my fingers crossed. Thanks for the tip Will!