Difference between auto and manual
If you are going to drive it on the open road, the five-speed is great.
BTW - the torque converter gives the equivalent of an extra gear.
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+ for left foot braking.
I admit there is some primitive part of the brain that gets endorphin rushed by the direct drive aspect of a manual. At the same time, it is like cornering, if you aren't pushing the limits of the turn-in, tread slip, exit point, i.e., pushing the limit of shifting means missing a gear (occasionally) and that sound is literally like root canal on your box.
Seriously, an auto will never anticipate your next move so why not just have full control over the car.
No lack of engine braking here.
No pause for me here.
It's all in how you use that auto shifter.
I must say that the 87S4 auto, even with additional horsepower, does not seem to be in the same league as my 81 5-speed. I know this is counter-intuitive but you can ask BlackShark who owns the 81 competition package now and also has late model autos. I think he'd tell you the same thing.
On the flip side, the last time my (now) wife and I went to SITM (our second time), it was with the auto, and she drove. It was fun for her and a break for me.

Some of that is personal preference. Actually, all of it.
Last edited by dcmelik; Feb 10, 2009 at 12:17 PM. Reason: typo
The issue isn't lack of a third pedal or automated gear changes. It's the viscously-coupling and associated power loss.
As I said, I may be grossly mistaken. If anyone can find a successful, non-trivial, non-experimental racing (oh, and non-drag-racing) application of a viscously-coupled slush box, I'll take it all back.

Viscous coupling irritates me.
Loosing ~5% power during acceleration irritates me.
Needing to check for a flexing flex plate irritates me.
Needing to feed a box its fluid one teaspoon at a time irritates me. (Yeah, yeah, you can use a pump. That's irritating too.)
Rogerboxes peeing their blood-red fluid onto my garage floor irritates me.
However, you have to match revs going up and down. And if you don't already know how to match revs you do not want to learn on the 928.
I've driven the Audi dual-clutch box. (Which, BTW, is functionally identical to Porsche's new PDK system.) It's way, way better than BMW's SMG (sequential manual gearbox), but, no, it doesn't do exactly what you want when you want it to.
My next DD will have a dual-clutch box. They are almost as good as a left-leg-powered manual.
That said, the car companies are doing an absolutely terrible job of marketing these (relatively-)new automated manual gearboxes. Terrible. I think 99.999% of the car buying public doesn't have a single clue as to the difference between a "manumatic" and "automanual" transmission. Unfortunately, 99.0% don't care. However, the 0.999% that might care aren't presented with the information.
I don't have a problem with automated clutch operation. I don't have a problem with only two pedals (although I wish the brake pedal on automatics wasn't 572 inches wide.)
I have a problem with slush boxes. They are too slushy.
http://www.autozine.org/technical_sc...ear_manual.htm
Anyway, I don't mean to raise the flame level on this debate, as it's mostly personal preference. I just think most of the negative commentary about the "slushbox" being inferior is exaggerated. If you leave the autobox is D it's going to feel pokey. Row the shift **** a little bit and for all practical purposes you've got a semi-automatic with good control over gears. I have loads of fun moving the gears around when driving the twisties. Most people who drive behind me think I have a manual. Also, I'm at 200K miles, many of which would be considered tortuous for the drivetrain, and I haven't had to replace a clutch or do anything at all to the autobox besides fluid and filter changes. However, lately I think the shifting form 2nd to 3rd WOT is less crisp than it used to be. At some point it will get a well-deserved refurb, but I'm not there yet. George Suennen is running an autobox in his 198.6 MPH open road racer. The transmission has never been an issue. It just works and works well. We spend all of our time worrying about other parts on the car.
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Having a shorter shifter and also having replaced the ball cup and shift coupler, shifting is quick and precise.
I agree that driving in heavy traffic is not fun but that is not why I have a 5 speed. I have heard nothing but positive reports about the Rogerbox and feel that this is another reason why the 928 is a very well designed and thought out car. This shows that the 928 can do many things and do them well.
But again for me the 5 speed is the way to go.
Give me a 'rogerbox' anytime. Four speeds are plenty on the street.
Good luck in your purchase - drive several of both. Proper adjustment on an auto is key as several have said.
Gary Knox
The point about "Marketing" in my first post is really coming to the fore here. My preference for a non-slush-box has nothing to do with the user interface. On the other hand that - the user interface - is all that you and most other folks seem to discuss and compare. Hence the complete confusion as to the design-difference between a "manumatic" and an "automanual" transmission.
The user interface - whether or not the gear-change is left-leg powered or electron-powered - has little to do with the architecture inside the box itself. My dislike of "slush boxes" has nothing to do with their left-leg-less gear changes and everything do to with the guts of the box.
The "slush" box is on the way out. It is a 50-year old analog solution in a digital world. It's a solution engineered by some very bright engineers in a time when computers were the size of buildings and just about anything automatic had to be done the hard way.
Dual-(dry-)clutch gearboxes have replaced slushies in Porsches and will soon replace slushies in the mid- and high-end market. I bet that within 15 years very few new cars will be offered with a slushy.
You mean other than Jim Hall's Chaparral?
(You didn't specify that it had to be current!)
Dual Clutch automated manuals are the way of the future......my M3 has one (DCT or DKG) with 7 gears and it is SO sweet.....super fast shifts (3rd gear scratch with ease)...launch control built in.....the ability to snap your head back with brutality or shift so smooth you can't hardly tell it shifted unless you look at the indicator....it is WORLDS better than the old SMG....
For racing you never take both hands off the wheel too, which is VERY nice.....
Now if there only was a reasonable cost way to fit one to a 928......bummer is its heavy at over 200lbs



