Carl Fausett

Andy,

you just started a new prospective customer category!
D: Owners of 928 automatics who always wanted a manual.

(the other 3 groups are in post #24)

As the owner of a automatic, you would still need the 928 pedal assembly, clutch master, clutch slave, fluid line, flywheel, bell housing, pressure plate and disk, throw-out bearing, guide tube, and release fork
JUST LIKE YOU WOULD IF YOU WERE SWAPPING IN A 928 5-SPEED,

but at least you wouldnt have to locate: a good used 928 5-speed and torque tube, driveshaft and rear crossmember. Given that a good used G28.13 928 trans goes for about $3500, and you can get the C5 transaxle with differential for under $2000 (I paid $1650 for mine) the price of the automatic-to-manual conversion might have just come down!

Carl Fausett

The new list of prospective customers for this kit (thanks Andy!)

I see the prospective purchaser for a kit like this to be either:

a) 928 road-racers
b) super-928's... guys above 550 lb/ft of torque who are breaking their trans
c) owners of 5-speeds that just want a 6-speed.
d) owners of automatics that have been waiting for an even better reason to convert to manual trans

Mongo

When it comes to price, in all honesty, I think a good manual conversion for auto cars should retail anywhere around just shy of supercharger kits that I have seen. Perhaps around $3,500-$5,000 overral for kit including transmission and differential in my opinion. At least, that's what I'm willing to pay. I have seen ZO6 transmission/diffs complete for shy of $1,800 on ebay. The option should be given to buy the kit without the transmission and differential so clients can go and source their own, whether from a wrecking yard or neighbor with a wrecked C5 (ahem to the one down the street from me).



On a side note, my Father in-law still worships you for the Powerdyne rebuild in his Escalade (probably also how ended up with his daughter as my wife as well as his blessing too).

Carl Fausett

I'm glad you like your wife!

Yes, I plan to go to market sans trans. I can ship the bits they need, they can pickup their transaxle wherever they can find the best deal. That way too they can avoid expensive shipping costs and just locate a trans near their location.

hacker-pschorr

As for the auto to 5-speed conversion, I really like what Colin did mounting a Wilwood clutch pedal / master to the floor instead of using the factory setup and going through the changing of the firewall procedure.

Granted not as original and will hurt resale, I like the concept.

Carl Fausett

Good point. If the owner is not a purist, why not?

Lizard928

The wilwood pedal is the only way to go for these conversions IMO.
Takes seconds to bleed, and is able to be better positioned for drivers comfort.

Mongo

I have to look up what the Wilwood pedal looks like. Is it slaved off the master cylinder like your typical setup?


By the way, how would you go about resolving the timing retard issue from the transition in gears on a manual conversion? Changing the coding plug from AT to MT?

John Speake

You want to retain the retard or inhibit it ?

Mongo

What do the MT 928s usually do once coded with that plug? Is there any change in timing when you upshift or downshift, like on the AT 928? If there is no retard, I'd say inhibit it since the LH may be fooled by the transmission.

Lizard928

There is no timing effect on the MT cars.
Only on autos.

Wilwood has its own reservoir.

SeanR

huh?

SeanR

I hate when we can't delete comments here now. Thanks Sterling for flucking that up for everyone. This dumb comment was about 'timing effects' and I misread what Colin was saying.

Mongo

I once talked to a guy (not on this board) with a 5-speed conversion. It was several months ago. He did a conversion to an 87 with an 88 drivetrain, but complained that the car shuddered and loss power after changing gears and engaging the clutch. The end diagnosis was the coding plug had not been changed from automatic to manual resulting in the LH timing adjusting to the transition.

Now I'm not so sure about this, but I remember a sensor on the transmission that may lead to the EZK or LH. I don't have a wiring diagram in front of me, but wouldn't that sensor provide the signal to both control units indicating when to retard the ignition timing during upshifts depending on how the LH is 'coded'?

John Speake

The auto transmission gear shift switch only acts on the EZK ECU. Not sure how the incorrect coding plug would produce the reported problems.