Mike Simard

The inner shaft parts are from a vette C6. That gives me slightly larger splines, more common clutch discs and goes well with what I've always wanted in a TT design with good bearing support at the rear.

The housing is aluminum, larger than stock but not as big a vette. There's a point at which a big tube becomes a problem and I don't want to have the TT rubbing against the body.

123quattro

I was hoping that was sort of what you were thinking. Very nice work.

BC

I guess I need to get that throw out bearing case before you don't feel like making them anymore!

brutus

Yes, so I have been told.."There's a point at which a big tube becomes a problem...."

Rob Edwards

Mike, if it makes any difference at all in your plans to produce multiple copies of this, put me down for a transaxle and TT.

IcemanG17

DROOL............................:bo wdown:

Mike you are the MAN...... jeez....a custom 427 928 engine with custom cams, ITB intake, dry sump & stand alone ECU is just too easy...... that trans is STUNNING.........

If I had a "real" engine I would be all over it..... I also agree that 4 gears is plenty...with the high torque and low redlines that most race 928's run (not your of course) there really is no sense in having so many gears..... 4 is plenty.....

With my shifting issues I only run 1 4th....and it still gets around the track nicely......I think my issue will be fixed soon and I can start using 2 or even 3 !!!!

FBIII

Why this approach versus Aspkillers Corvette transmission transplant?

Mike Simard

1-Because I want a drop in trans with no major car mods like cutting up crossmembers etc.
2-I prefer the 928 diff and CV joints. The 108mm CVs are excellent and allow a longer axle. The vette is very wide.
3-I want a stronger trans.

There may be more points listed in the first post.

If I could have bolted in a vette trans after breaking the last one I would have but they don't bolt in.
It might help to see what the vette installation looks like but pictures have been cropped at where the problem area starts. I assume that this is because there's enough scary stuff going on to not want it shown. All I can do is assume since nobody has decribed the process.

All I know is that there are going to be serious mods required such as cutting the crossmember and that makes it undesireable to me. Maybe if someone lays out what's involved it would dispell the mystery and therefore great risk. Xschop seems to be doing that now so maybe the conversion will be practical soon. The biggest hurdle is understanding what is faced.

I would personally still not be happy with the vette trans itself and yearn for a real racing box to handle big power though.

Jon B.

If you could fit the corvette transaxle you could then fit an EMCO Sequential....

hacker-pschorr

We carry spare CV's with the Corvette team.
A stock Vette transmission would never survive your engine, unless the torque tube dampener or differential failed first.

Mike Simard

Then you might as well do a full tube frame car using only the 928 outter skin. That would be very cool.

I like the 928 chassis as is. It's very good and not many cars are so lucky as to be this good for racing with a stock chassis.

It's satisfying to have a 33 year old car with only IT like suspension mods, a souped up engine and competing against well prepped modern Vettes etc.
I don't want to have to do major mods to something so good, maybe a lesser car with lots of faults but not a 928.
I'd rather build something from scratch which I am doing but that's another story.

123quattro

True, but I have a feeling Mike will have less than $40,000 in his transmission.

AO

Sure, if I had a CNC mill and years of training, I could have done the same thing. Instead I've chosen a different path. Some call it laziness, ineptitude, or even 'slackerness.' I prefer to call it capital preservation.

Mike, if you post more pics of your work, I might have to break out the $59 Dremel and show all of you guys how it's really done. Tempt me... I dare you. You will regret it.













(nice work!)

Cheburator

The X-trac 6spd transaxle as fitted to all the Aston Martin V8s fits our car pretty well too... But then you will need a different ECU and torque tube. Oh, and about $20k...

SMTCapeCod

Used to be that the Doug Nash upgraded Muncies were economical 5...and I think 6 speed now....Not jerico caliber though. I think they are solid to 500 or so, but mid 600 plus race conditions, maybe not. My info is a couple decades old, too, but still an interesting twist to see a Muncie-ish case fitted to the 928 bits.

Can't wait for the next track vid, there is going to be some suhweet gear whine this time!