shift coupler problem

craig001 · Post by **craig001** » Tue Oct 04, 2005 8:10 am

Yesterday after work I decided to renew my rear gear linkage coupling bushes, nice easy job I thought.
Got the old bushes off, new ones on with no problems. came to re-assemble it all and found that I cant get all gears. 1st, 3rd and 4th I think are ok, but 2nd and reverse have dissapeared!
I played around with adjustment for an hour or so, got miffed off and packed up. Unfortunalty I didnt have any manuals with me so it was all guess work.
I got home and did some homework, Haynes says adjust it by pushing the lever far left and rotating the coupler in the opposite direction (simplified). I also had a look on the Pelican forums and found guys saying this method worked for them.
Has anyone any experience in adjusting this who can offer some tips or more information before I go and have a another crack at it tonight????

Nige · Post by **Nige** » Tue Oct 04, 2005 8:26 am

I bummed around with mine for a while but got it sorted in the end. Just kept tweaking until I got all gears sorted. I actually made the bushes myself out of MDF

as a quick fix until could be bothered to order the correct part, that was nearly 5 years ago now! You can't beat MDF, might make me some suspension bushes out of it too, got to be better than that Polyurethane stuff

Perhaps just a fresh eye over it tonight will get it sorted

craig001 · Post by **craig001** » Tue Oct 04, 2005 9:25 am

cheers nige,

who needs those fancy elephant racing poly-bronze thingies when a good'ol piece of MDF will do eh?

Maybe this will be one of those 'come back to it again refreshed the next day' jobs that just are so much easier the second time round.......

Nige · Post by **Nige** » Tue Oct 04, 2005 9:49 am

MDF is the future! don't why it isn't used by more so called sportscar manufacturers. Perhaps the carcinogenic dust has environmental issues?

I seem to remember as a starting point using the gear thats furthest across the gate and then just rotating the bush assembly around until it couldn't be selected, then just tweaked the bush around until it would select, then all the other should select. Think it was 5th on mine that I set it up from, might be different on yours as mine has a conventional gate pattern, i.e. no dogleg 1st.

craig001 · Post by **craig001** » Tue Oct 04, 2005 8:43 pm

It was one of those 'come back tomorrow, it'll be easy' jobs, Got round there and within 10 minutes I had all gears back!!!.... panic over

now back to driving

Nige · Post by **Nige** » Tue Oct 04, 2005 9:01 pm

Good work dude!

The MDF did the trick then!

chris68 · Post by **chris68** » Thu Oct 06, 2005 12:05 pm

Hi,

I thought about changing the shift coupler on my car. It doesn't seem obvious how you get the old one apart. Do you have to press out the pin that passes through the middle of the bushes??

Cheers,
Chris

2.4TE · Post by **2.4TE** » Thu Oct 06, 2005 12:39 pm

Yes- taps out with gentle strikes to the pin, need to hold it in a vice though. Just done mine- quite an easy job and the parts are cheap. Well worth the effort for improvement in gear shift. Recommend you mark everything with a dab of white paint so you can get it back together without a struggle to adjust.

gav p · Post by **gav p** » Mon Oct 10, 2005 9:49 pm

Interesting... the only "breakdown" I had with my 912 in three years involved that linkage pin. Driving through Crystal Palace I found that it was stuck in 4th gear (!) and the gear lever appeared to be disconnected. It turned out that the pin had fallen out of the shifter link altogther! - not sure how this could happen, as it is supposed to be an interference fit. Managed to get it held together enough to get home, using gaffer tape!....

craig001 · Post by **craig001** » Tue Oct 11, 2005 8:53 pm

mine was a very tight interference fit that took quite alot of persuasion with a big hammer to knock out. the only reason I can see one falling out is if it had been taken out once or twice before and the fit just wasnt tight any more.
Ive Just been out for the first drive since I did the job (got bogged down in fixing the daily hack) and what a difference it has made!!! much more like a gearbox now and less like stiring porage!

The guy I bought the car off thought the gearbox was on its very last legs, he actually got some quotes for a re-build. Ive now replaced all front and rear bushes on the linkage and have solved nearly all the problems. I would recommend this as being the first job to do if you think the gearbox is on its last legs, its certainatly cheaper and easier!!

Jonas · Post by **Jonas** » Tue Oct 18, 2005 8:00 am

I also got that "less like stiring porage" effect when changing the coupling bushes. Now I can not stop thinking what one of these might do ...

Precision shift joints
The Stock joint is a direct bolt-in replacement for the original Porsche shift coupler used in 911's from 1965 to 1986 and 930's from 1975 to 1988. The transmission side of the joint is attached to the transmission using the original M8 conical nosed set-screw from the stock coupling. The shifter side of the Stock is inserted inside the shift tube, using a stump with O.E. style parallel knurling and is retained by the original pinch clamp.
http://autoatlanta.com/model/911-1104/9 ... ssion4.htm

DDK - Die Deutschen Klassiker

shift coupler problem

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