924Board.org

[Maleraj]

Hi everyone!
Been lurking around this forum for a couple of years now, it's a real gold mine of information, and want to start of by thanking everyone for sharing their knowledge!
With that out of the way, let's get on to business. I've got this 924 2.0NA from -78 with a bad 4-speed in it, and i've been thinking that since it has to come out anyway, it would be nice to replace it with an Audi 5-speed instead. I've been doing some reading, but just want to confirm that i've understood things correctly. So from what I can see, the swap from an Audi 4-speed to an Audi 5-speed is pretty straight forward and, as long as I get my hands on one with the 20mm input shaft, the only real difference installation wise is that the shifter rod for the 5-speed is slightly shorter than the one for the 4-speed. From the transaxle applications table this would mean that I need a trans with either of the codes VQ, MD, or 4Q, and that I also would need the shorter shifter rod.
What I would like to know i whether I'm right thus far, and also: Is there any difference inbetween the different transmission code options? And if I wouldn't be able to source the shorter shifter rod, shouldn't it be possible to just shorten the one i have right now?
Thanks!

[Cedric]

It was a long time ago since i did it with a friend, on his car but i dont remember swapping rods. I think the shifter mechanism on the 4sp could be transferred to the new box to make it work. Anyway its probably the cheapest performance upgrade possible on these cars, have fun with the extra performance:)
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1980 924 Turbo
www.instagram.com/garagecedric/

[Mclaren924]

[924RACR]

Correct, you'd need the shifter rod with the different length than the 4-speed.

A 944 or 931 5-speed (non-dogleg, obviously) would be decidedly more work (due to the larger input shaft) than getting the right 924NA 5-speed. Either have to make up a custom coupler to connect to the smaller NA torque tube, or swap the torque tube as well and use a Ford clutch disc. Plus the gears are a bit taller, not quite as fast as the NA box.
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Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype

[MikeJinCO]

The above is correct but you must be a little careful with this as if I recall correctly the USA gearbox sequence vs the ROW sequence might be different. In the US the final drive ratios for the NA were '77 3.60, '78 3.88 and then 4.11 for the 5 speed from 81 on. The internal gearing was the same thru out with a longer 5th gear for the 5 peed. The 944 then went back to a 3.88. The shift rod for the 5 speed is shorter because they relocated the shift rod on the transmission.

The 5 speed is quite a tight fit with the stock gas tank in place. As Maclaren said the Only944 short shift kit works miracles, but can also be quite difficult to install with the transmission in the car.
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Mike


'67 MG Midget Dp
'71 Ocelot Dsr Kawasaki 1000(under rebuild)

[Maleraj]

[Mclaren924]

[MikeJinCO]

I just checked and the early 944 and late 924 5 speed shift rods have the same PN. Clarks Garage.com is a great reference. I took my donor 5 speed out in the middle of a field so it was a bit tricky. I think the success to getting it in is to have a good angle adjustable transmission jack so that it can be held parallel and quite close to the torque tube flange. Also when you take the existing trans out, the torque tube will drop down onto the body shell cross support so it is no longer horizontal. I put transmissions in with the hangers not attached to just give me a bit more room.
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Mike


'67 MG Midget Dp
'71 Ocelot Dsr Kawasaki 1000(under rebuild)

[Maleraj]

Thanks to everyone for your input and tips! Do any of you happen to know what the actual length difference between the five-speed and four-speed shifter rod is? If anyone here knows or have happen to have both laying around, some measurements would be greatly appreciated!