924Board.org

bradito · Joined: 04 Aug 2011 Posts: 63 Location: Iowa

Anyone ever tried to put an early 944 tranny in a 924? So far this seems to be the most feasible solution for my woes. The donor car it's an 85.5.
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1982 924
1981 931

924RACR · Posted: Tue Aug 28, 2012 9:45 pm Post subject:

Yes, BTDT, some gears are a touch tall, but works well otherwise. Pretty sure we wrote this up a few times...
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Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype

bradito · Joined: 04 Aug 2011 Posts: 63 Location: Iowa

Awesome. Thanks!
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1982 924
1981 931

fiat22turbo · Joined: 18 Jan 2006 Posts: 4040 Location: Portland, OR

Isn't there a shaft diameter difference? I seem to remember Ideola hammering on me about that before....

I think the 924 turbo and the 944 share the same shaft diameter, but the 924 NA and the 944 do not.

The 924S and 944 also share the same shaft, but then the 924S is just a 944 in a slinky dress

So I think you'd have to swap the clutch disc and torque tube or swap the input shaft of the 944 trans.
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Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose)

ideola · Joined: 01 Oct 2004 Posts: 15550 Location: Spring Lake MI

Yes, there is a drive shaft diameter difference between the 924 NA and the 2.5L cars. If I remember correctly, the input shaft on the 924NA Audi-based trans is also shorter, meaning that you can't easily make a coupler adapter either. The one sure way to make this work is to replace the 924 torque tube with the 944 torque tube, and then install a Bronco II clutch disc, which can be run with the NA cable operated setup without requiring the entire hydraulic clutch setup found in the 931 and later 2.5L cars.
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erstwhile owner of just about every 924 variant ever made

924RACR · Posted: Wed Aug 29, 2012 5:18 am Post subject:

Exactly - use the 944 torque tube, Bronco II clutch disc, and you'll also need the shift rod from the 944 if you're putting it in a (formerly) 4-speed 924.
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Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype

bradito · Joined: 04 Aug 2011 Posts: 63 Location: Iowa

The clutch from a freakin' ford bronco!? That's hilarious. There is some info in the tech section of 924.org as well and it seems to indicate that I will also need the mounts and a crossmember for the torsion bars in addition the shifter and linkage... Thanks for the knowledge guys. You rule! Oh and btw it is currently a 5-speed if that affects anything. Well at least now I know it is doable.
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1982 924
1981 931

924RACR · Posted: Fri Aug 31, 2012 10:13 pm Post subject:

No, you won't need to change any mounts etc - it's a bolt-in.

But what's wrong with the 5-speed? Consider rebuilding? Gearing will be better...
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Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype