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david_bryan · Joined: 10 Dec 2003 Posts: 45

I own a 1980 931 and I think i need a shift kit. There is alot of play in my shifter, it pops out of reverse and 1ts gear, it hard to get into gear and it grinds alot. Its just sloppy. So i think i need a shift kit (corect me if im wrong). So where can i get a shift kit for my car? - Thanks ,david

Kenodog · Joined: 25 Jun 2003 Posts: 2651 Location: Vancouver,B.C.

Sounds to me like you need a 1st gear syncro and more.Shift kits are for automatics,short shift kits are not made for our cars.
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1979 Euro 931, Olive
1981 931, Sabine
1991 Ford Ranger XLT 4x4, Ricky
1996 Ford E-350 ex-FedEx Van
2014 Mazda CX-5 (Kinderwagon)
2019 KTM 790 Adventure
2024 KLX300
2024 KLX140

81turbo · Joined: 03 Nov 2002 Posts: 1065 Location: Oakland, CA

Yes another Snailshell bite the dust. You need a lot more than a shifter!

jl924t · Joined: 03 Nov 2002 Posts: 214 Location: Surrey, BC Canada

you can order the parts to firm up your shifter. there are 4 bushings $1.84 ea(999 924 002 40) 2 spring plates $18.88 ea(999 166 034 02) and 2 retaining clips $2.71 ea(477 711 216). This tightened up my shifter. The prices are from a local Porsche diistributor (Weissach.com) with my PCA discount. My guess is that the retaining clips came off.
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1980 924 turbo

CMXXXI · Joined: 05 Nov 2002 Posts: 1939 Location: Vicksburg, MS

If things are really "sloppy" when shifting, I suspect that the bushings linking the shift rod to the transmission shift shaft are worn out. Between these bushings and the guide rod's anchor bushing, these are two very common items that need attention with these gearboxes. The grinding is as Kenodog suggests, probably the synchros needing replacement. Do a search on "shift linkage" or "G31 transmission" and you'll get a lot of info on the problem, and what can be done about it.
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'79 Eurospec 931

Lizard · Posted: Fri Dec 12, 2003 6:17 am Post subject:

OK I will cover this 1, you need the following

New ball style bushing which is the lower shift rod lever and snaps onto the torque tube, it is dificult to install,

new rubber busings for the shifter rod, a few buck at your local porsche dealer no biggy to install,

then the tranny will need, new syncros for 1st 2nd and maybe 3rd gear,
as per the popping out of gear this will require new dog teeth, all I have to say is good luck finding the 1st gear syncro and dogteeth.

as per reverse, there is no fix, just be smooth in reverse not pounding the petal then releasing it suddenly as this is when it will pop out, or hold the shifter in.

now onto the tranny info, some people like the snailshell tranny as it is a MUCH more robust tranny and can handle a hell of alot moe power, supplied in 79 924 (not a G31 basically the same but smaller input shaft cannot hadle as much power as the G31), and the 1979 and 1980 931s these have the G31,
the trannies that are supplied in all the other cars including the 951 are audi based trannies, the 924 NA use audi based w/ 20mm shafts, all 931/924S/944/951/968 use audi based trannies w/ 25mm shafts,
now the people who like the dogleg will say try and fix it, but most will say find a 944 w/ a good tranny and torque tube and swap it in, you will only require the tranny, torque tube, and also the shifter linkage as it is different. however the only complication here is the 1979, and 1980 931 w/ the G31 have 2 "arms" which protude from the trailing arm which is what the tranny bolts to, these have to be chopped off or the audi based tranny for the bellhousing to fit, it isn't going to be that hard if you have an angle grinder, I wouldn't use an oxy acetelyn torch in there due to the proximity of the gas tank. the rest bolts in, but while you are in here you might as well replace the clutch disc. anyway hope this helps
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3 928s,

CMXXXI · Joined: 05 Nov 2002 Posts: 1939 Location: Vicksburg, MS

I'm sorry, but I can't bite my tongue on this. Some of these cavalier statements are a real dis-service to our new member who is seeking advice.

Paul · Posted: Fri Dec 12, 2003 9:26 am Post subject:

Popping out of gear usually means the operating sleeve needs to be replaced.

Lizard · Posted: Fri Dec 12, 2003 10:03 am Post subject:

Kenodog · Joined: 25 Jun 2003 Posts: 2651 Location: Vancouver,B.C.

You can replace the shifter knuckle bushing in about 2-2 1/2 hours if you have two people and the right tools on hand.We did mine in that time using only hand tools and a vice to push out the cross pin.While you're at it replace the shift rod on top of the tourque tube,it's cheap and not so difficult to install.If it's possible,re-build the G31,it's a really robust tranny,the drive gears are over an inch wide iirc and I was told by a 30 year veteran P-car tranny guy that it will take more power than the early 911 trannys.Good to know if you plan on adding power (intercooler) or more boost.If you try to drop it out yourself know that the Haynes manual actually got it right.(I was kinda surprised)If you follow their instructions step by step you can't go wrong.One tool you will have to make to take the top drivers side allen bolt out is get a 10mm allen key with the ball on the end,cut off the bent part on the end so all you have is the main shaft and put that in a 10mm socket with about a foot of extensions and you'll be rockin'.If you're in my neck of the woods let me know and i'd be glad to help.Good luck ,L
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1979 Euro 931, Olive
1981 931, Sabine
1991 Ford Ranger XLT 4x4, Ricky
1996 Ford E-350 ex-FedEx Van
2014 Mazda CX-5 (Kinderwagon)
2019 KTM 790 Adventure
2024 KLX300
2024 KLX140

Dave951M · Joined: 03 Feb 2003 Posts: 57 Location: NC- USA

While I'm not sure about this on the pre 81 cars, you do not have to drop the tranny to remove the shift rod on the Audi transmissions. You will have to remove one of the brackets under the torque tube, take the shift rod loose from the shifter and slide the shift rod as far forward as possible. The shift rod should then clear the bellhousing, allowing it to be finagled down and out to the rear. I just did this on my 82 when I realized that I had the wrong shift rod from a 944.

I can see though, that it might not be possible with a snail shell.
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Dave951M
86 951 Guards Red (Gone but not Forgotten!)
82 931 Guards Red (under construction)

-nick · Joined: 16 Nov 2002 Posts: 2699 Location: Cambridge, MA

Yep, the Audi trans is cake. The G31 is a PITA!

If you're getting problems in all gears, I would definitively say that the bushings are the culprit. However, this isn't to say your syncro's aren't likely worn also. All the bushings and 1-2-3 syncros will run about $400, plus labor if you want to really get your shifting back.

-nick

Lizard · Posted: Wed Dec 17, 2003 4:58 am Post subject:

I managed to break 2 audi trannies before switching over to the 016/Z and it has been great
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3 928s,

81turbo · Joined: 03 Nov 2002 Posts: 1065 Location: Oakland, CA

We should all be so cool!

Lizard · Posted: Wed Dec 17, 2003 5:25 am Post subject: