changing tranny from 86 944 to 87 924s

Kenne944 · 03-12-2004, 05:48 PM

what is the difference between both trannys? and will the 924 tranny make my car run the same with the 944? just want to get some help before i go blow some cash on a diff tranny

JH924S · 03-12-2004, 05:51 PM

i see no reason why it shouldnt mate up fine, the final drive ratio might be diff but def should bolt up no prob

Kenne944 · 03-12-2004, 05:52 PM

ahh ok, yeah i know the ratio will be diff but im gonna put my speedo sensor on it so im just hoping that it will be better

Loquat15 · 03-12-2004, 06:10 PM

Quote:

Originally posted by Kenne944
what is the difference between both trannys? and will the 924 tranny make my car run the same with the 944? just want to get some help before i go blow some cash on a diff tranny

if its from a 924S, then you shouldnt have any problem. as far as running the same, probrably. Just not sure why you'd want to do that. If you had more HP, get the 951 transaxle

Loquat15 · 03-12-2004, 06:11 PM

If you were curious or just didnt know, 82-85 had the spedo linked to the front left tire, not through the transaxle.

85944na · 85944na's Garage

I think the 924s has the cable driven speedo that the early cars have, therefore you will maybe have problems with the speedo sensor since the 924s sensor is likely on the wheel as well, although I may be wrong, also I believe both trannies should be the same as the 924s is essentially a 944 with narrow fenders...if you want an upgrade go S2 tranny, mine is wonderful and no speed compermise that I, or anyone else can tell.

Chris_924s · Chris_924s's Garage

87 944 has speedo driven from the trans- 924S has the hub (front left wheel) driven speedo.
You will have a shorter 5th gear.

MAS · MAS's Garage

Yes... the 924S has a properly spaced 5th gear... still an overdrive, but closer in ratio to 4th. You have better top end acceleration with the 924S 5th gear.

Interestingly, you also should have a slightly higher top end. Since a stock 944 cannot quite redline in 5th (owing to the gearing).

-MAS

Loquat15 · 03-13-2004, 11:33 AM

Quote:

Originally posted by MAS
Interestingly, you also should have a slightly higher top end. Since a stock 944 cannot quite redline in 5th (owing to the gearing).
-MAS

It's governed to 135mph, so there aint no way it'll see redline unless you take off the governer (ie. get it chipped). Besides, you arent having fun when you're in 5th.

will944 · will944's Garage

Quote:

Originally posted by 85944na
I think the 924s has the cable driven speedo that the early cars have, therefore you will maybe have problems with the speedo sensor since the 924s sensor is likely on the wheel as well, although I may be wrong, also I believe both trannies should be the same as the 924s is essentially a 944 with narrow fenders...if you want an upgrade go S2 tranny, mine is wonderful and no speed compermise that I, or anyone else can tell.

I believe this is correct. Althought the trannies will fit, I don't think the speedo sensor will work from the 924S tranny. If it is the same tranny as an early 85 944...then it will not work....and I believe it is.

Loquat15 · 03-13-2004, 03:24 PM

Quote:

Originally posted by 85944na
I think the 924s has the cable driven speedo that the early cars have, therefore you will maybe have problems with the speedo sensor since the 924s sensor is likely on the wheel as well, although I may be wrong, also I believe both trannies should be the same as the 924s is essentially a 944 with narrow fenders...if you want an upgrade go S2 tranny, mine is wonderful and no speed compermise that I, or anyone else can tell.

Eh, you wont have any problems if it's cable driven off the front left wheel like how it is on the early 944. I dont see how you would have a problem by switching out the transaxle if this is the case, you wont have to deal with any speedo linkages between the transaxle and the speedo.

So it's taking the speed from the front left tire, not tranny. Tranny can be whatever and the front left tire will still say how fast you're going. Phew. Just had to repeat myself in the same post.

carsontc · 03-13-2004, 05:20 PM

Quote:

Originally posted by Kenne944
but im gonna put my speedo sensor on it

your signature line does not say what model/year your car is

so we're guessing it's an 86 since that's the transaxle you are taking out

don't know anybody who was able to put the speedo sensor from a 'late' 944 into the 'early' or 924s transaxle...the internal stuff required is not there for the sensor to use

if you have the electronic speedo (85.5 through 91) you need a late transaxle and that excludes the 968 six speed as well.

MAS · MAS's Garage

"It's governed to 135mph, so there aint no way it'll see redline unless you take off the governer (ie. get it chipped). Besides, you arent having fun when you're in 5th."

[In the spirit of friendly debate

]....

What? The 944 or the 924S? My 87 924S was stock and had no speed governor... but it did have a rev governor at the redline.

(two other people I knew with 87's also did not have speed governors either... and their cars were unchipped and stock)

Incidentally, this is the first time I've ever heard anyone mention anything about speed governors in these cars (944 or 924S)

Also, I have the Car and Driver review (in front of me) of the first 924S, and it says nothing about a speed governor. In fact, it confirms that the 924S can redline in 5th. And it also confirms that this is mainly due do the shorter 5th gear.

-MAS

Chris_924s · Chris_924s's Garage

I have no governor. I can redline anytime. Top speed 138 MPH.

Loquat15 · 03-14-2004, 11:49 AM

Quote:

Originally posted by MAS
What? The 944 or the 924S? My 87 924S was stock and had no speed governor... but it did have a rev governor at the redline.
-MAS

944. Actually, i've never taken it up all the way, but i've heard the top speed is 135mph. Reguardless im pretty sure that the engine would be near 6k if not above it, so really close to redline.

Besides, i always think of 5th gear as the "economy" gear as it's tall and you can usually save money by using it (properly of course).

Oh well, i dont recommend taking your 944 up to top speed. It's illegal! haha, unless its on a racecourse, but good luck with that too. it seems to take a while to get going that fast.

lousailor · lousailor's Garage

Quote:

Originally posted by Loquat15
It's governed to 135mph, so there aint no way it'll see redline unless you take off the governer (ie. get it chipped). Besides, you arent having fun when you're in 5th.

I know plenty of guys locally that have fun in 5th - It's called 944-Spec Racing!

Loquat15 · 03-14-2004, 03:36 PM

Quote:

Originally posted by lousailor
I know plenty of guys locally that have fun in 5th - It's called 944-Spec Racing!

not stock are they?i hit about 110 in fourth

lousailor · lousailor's Garage

It all depends on what your druthers are. The 944 Cup series sponsored by NASA (No not that one, the National Auto Sports Association), is run on the East Coast and requires travelling between several diff tracks, but I think allows for many modifications. See:
http://www.44cup.com/homepage.html

Then there's the 944-Spec class, again sponsored by NASA, that races in AZ and CA. They only allow for specific modifications to suspension and weight reduction, to make the racing even using stock NA motors. Check out their website (they race at Willow spring frequently so you could do a DE in conjunction with a race weekend). If you want to get started at the next level above AX with very little investment and you already have a 944, it's the best bet.
http://www.944-spec.com/944/index.htm