Moook

Hi folks..
Hope somebody can help me out.?

Does anybody know if a 968, 6 speed gearbox will fit onto a 944S2 ?

If so will it fit easily / strait forward ??? or will i have to modify anything.????

Ta
Dave W.

Jfrahm

It fits fine, but you'd have to bodge the speedo signal somehow. The 968 gets it from the ABS brain, the S2, I believe, gets it from a sensor in the trans.

-Joel

tifosiman

Joel is correct. You will lose the speedo/odo input. In order to use the 968 trans in your S2, you would need to purchase a sending unit for a rally computer, modify it to take a pulse off the front wheel or rotor, and then find a way to convert the pulse so that the 944S2 pod reads it correctly.

More importantly, why do you want to do this? The gearing will be way off. And you would also have to get the correct halfshafts, as the are unequal length on the 968. The 968 box is also heavier and longer (you may need to modify the spare tire well, I don't know this for certain but the measurements indicate to me that this may be so. Someone else can confirm.).

Alex Cook

What's all this about Dave?

Buying an S2 to make it a 3 Porsche family?

Sounds interesting!

Moook

Alex
Ive had a few CHALLENGES lately [Porsche ] related....
It will all become aparent soon......

So far thanks to all you tech heads re gearboxes....

With the S2 speedo ? If the car was a late model ,ie,fitted with abs would the speedo then work ok.??? OR is it still diferent.??

Dave W.

Moook

I have also found out that the 968 fuel tank is needed to give more room under the 944...
Among other things....

Alex , as one who has driven both 944S2,+968 Sport
How do you find the gearing.????? Preferences V,s cost of car initialy.??????

I HAVE read the magazine but just want to get it from the horses mouth "so to speak"......

Dave W.

tifosiman

Even if the car is a late model, the speedo/odo gets its info from the trans and not from the ABS like the 968 does. That means that it wouldn't understand the input it would get if you somehow tried to hook up the ABS system.

You are correct, you could get a 968 gas tank and make the trans fit that way.

Alex Cook

The gearing on the S2 is fine - 1st and 5th are almost identical to 1st and 6th in the 968, so the only difference is slightly bigger gaps between each ratio. The shift isn't quite as good as the 968, but definitely up to the job

Very similar drive overall to the 968 - because it's lighter there's very little performance difference. The engine is a bit more of a slogger (less revvy) though, and the redline is at about 6200 which is a bit low for my liking

At current prices, they're an absolute steal though, get one with a good history and you'll be laughing

rsrdan

There is one for sale in the classifieds.Email him with questions.As for the transmission,the hot set up would be a LSD S2 box with short 3,4,5 gear.

Tom Carson

The late 944 speedometer is looking for 6 pulses per axle rev. a strange number

dunno how many pulses the ABS system transmits per (right front) wheel rev...does anyone here know?

also could you just use a 968 speedometer with the ABS hall sender as an input?

EDIT: checked the book and it says 4 pulses per hall sender rev...dunno how that equates to axle revs

PTskater944

I've heard that the first gear and reverse are dangerously close to each other on the 968 transmission. It freaked the driver out when he tried to pull away from a stop sign, thinking he was in 1st gear, and started going backwards. I guess its just something you have to get used to.

Ethan

I recall hearing that the S2 box is stronger then the 968 box? Or maybe I read that a few 968 turbos have 951 or S2 boxes? Not that I wouldnt take a 968 tomorrow. PTskater, that reminds me of a friend of mine whos father had a 993tt. He let my friend take it out, who could barely drive stick. I was following him up a hill in the neighborhood, and he almost came to a stop. I just kept seeing the reverse lights come on and go off. Could have been pretty ugly, but he was lucky and finally found 1st. God that car was fast.

tifosiman

You could get a sensor for a rally computer, hook up two magnets for the sensor to read on the back of one of the front rotors, and then find a way to multiply the input signal to the speedo X3.

Zero10

Depending on the voltage, I think a frequency-analog converter, than another analog-frequency converter, with different specs would be the way to go, seems to be about the cheapest way to make a frequency multiplier/divider, although they would both have to be linear to make this easy.

Perhaps the ABS sensor only generates 6 pules/revolution?.... It's probably more like 26 though...
I don't think that it would be that hard to fool.