924Board.org

[Paul]

Yeah I guess my idea would only work one gate, it would be hard to move it sideways to the next gate!

Why is that U joint needed at all? You can shift the tranny by the shaft on the tranny so why would a solid extension to an Audi shift lever set up not work?
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White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy.

[Rocco R16V]

[v8carreragts]

[Rocco R16V]

Ok probably true, but I still wouldn’t want to use a fixed sleeve instead of a u-joint there.
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"Government exists to protect us from each other. Where government has gone beyond its limits is in deciding to protect us from ourselves. "
Ronald Reagan

[Rasta Monsta]

Hmm I have both boxes on the floor right now. . .mayhap I'll do some staring this week.
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Toofah King Bad

• WeiBe (1987 924S 2.5t) - 931 S3

[Grenadiers]

[ideola]

OK, it's not perfected just yet, but here's my "proof-of-concept". Everything seems to work just fine in terms of operating the gear shifter. Even the adjustment on the Audi shift-lever works.

The part I need to perfect though is the height of the shift rod itself. In this current iteration, it's probably too high and may interfere with the top of the TT tunnel. Haven't attempted installation yet to find out. The Audi rod required some creative forming to prevent it from interfering where the torque tube and gearbox mate. This particular rod was a 4-speed Audi so it's pretty much throw away, I can continue to massage it until I get it right, then apply the mods to a good 5-speed Audi shift rod I have on the shelf.








On the Audi shift lever, you can see the original position of the stock Audi pivot pin, which I ground off the weld and removed. I then drilled two holes below that that simulate the stock G31 pivot distance and the Lizard short shifter pivot distance. Using the stock Audi pivot point made the shifts EXTREMELY short. The bolt arrangement will probably need some perfecting as well, as it may interfere during shifting with the shifter hole in the tunnel, but it works fine as is for a proof-of-concept.

Oh yeah, and a gratuitous sneak preview of the UWB with the front fenders hung and the front suspension now bolted up!!!
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erstwhile owner of just about every 924 variant ever made

[Rocco R16V]

thanks IDEOLA!

looks like the rod will need a strange kink at the trans/tt junction to fit within the tunnel.

With it bolted in the longest throw (as shown), how was the side to side throw/feel?
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"Government exists to protect us from each other. Where government has gone beyond its limits is in deciding to protect us from ourselves. "
Ronald Reagan

[ideola]

It's a little hard to judge with the gearbox sitting on the floor...but to be frank, it felt a LOT like the firm, crisp shifts that I enjoy using Lizard's short shifter on my 941. Side to side action was no issue, but I suspect I'll have to address the bolting arrangement as noted above.

I do think it's going to need a strange kink at the coupling. However, if you could find a shorter u-joint, it might be just doable without the kink. The interesting thing is that if you look at the stock G31 primary shift rod, the diameter of the rod where it attaches to the shift joint is pretty small, probably no more than 14mm. Now we know why...the smaller profile is required for clearance. Also, the stock u-joint is about half the length of the standard u-joint I'm using. On the cheap piece I bought (from McMaster), I had to grind off about 2-3mm on the one side so that it didn't hit the flange when shifting into R-2-4.

I'm going to play around some more with the geometry of the shift rod before I try putting it in the car. Once I perfect that aspect, I'd like to redo the whole setup it with a higher quality u-joint, and I'll probably use hex head set screws (instead of the pan head as in the photos) because I think I'll want to safety wire them on a track car
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erstwhile owner of just about every 924 variant ever made

[ideola]

Last night, I worked out some enhancements and tweaks to the geometry of this setup and got the torque tube up into the car. I won't know for 100% certain until the engine and trans are installed, but I am about 98% sure that my latest iteration will have NO clearance issues with the rod in the tunnel.

Here is the complete writeup:
How to build an Audi-style shift linkage for a G31 gearbox
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erstwhile owner of just about every 924 variant ever made

[Rocco R16V]

Thanks Ideola, Thats great!
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"Government exists to protect us from each other. Where government has gone beyond its limits is in deciding to protect us from ourselves. "
Ronald Reagan

[milnersXcoupe]

Übermench Ideola Schnell Kopf !
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milnersXcoupe