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1982 Porsche 911 gear box problem
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CarGuru > Porsche > 1982 Porsche 911 gear box problem 18 April 2005 10:01:23

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1982 Porsche 911 gear box problem

Rooster` 16 April 2005 08:23:57
 Hi. I've got a beautiful looking red/black 911 SC Targa that I have
owned for the last 5 years. A couple of years ago I had the gear shift
lock up to the point that it had to be towed. It just wouldn't get into
gear. It cost me a whole new set of brake calipers and I was told that
they couldn't find any problem once they got it unlocked. Just the
previous year I had recently had my mechanic install a rebuilt
transmission. When I took my car out of storage recently I noticed that
it sort of clunked when shifting into second and third. Never any
problem downshifting or going into 4th or 5th. I took it to my mechanic
who said he thinks I just don't know how to shift or possibly the
clutch. He adjusted the clutch but no difference and besides I had
never had this problem about the clunking before and if it is the clutch
why woudldn't it do it going into the other gears too? Tonight it
almost locked up on me again. I was on a slight incline (same as
previous time) only this time with some real grunt work (really pushing
hard to get it all the way to the right and down) it managed to unlock
and was able to get home okay. I'm thinking about taking into another
mechanic to get another opinion but was wondering if any of you might
have an idea. Much appreciated. Thanks
Add comment
Mark 16 April 2005 17:13:40 permanent link ]
 As said by William, it's impossible to diagnose from here, but it's fair to
say that what you're seeing isn't normal, even by 915 standards. ;^)

As suggested, linkage is where I'd begin. Unless it's been refreshed in
recent years, it's probably due. They all seem to wear out and the shifting
gets very imprecise. It's easy to check and repair. The parts are among the
least expensive you'll buy for your 911.

Under the carpet in the rear, atop the hump & right in front of the rear
seat, there is an access cover held in place with four screws. Remove that
and you have access to the rear shift coupler. While looking down in there,
reach forward and move the shift lever slowly in different directions,
looking for corresponding movement through the coupler. The coupler is a
small universal joint and it has hard rubber/plastic bushings which elongate
and introduce slop. Those bushings can be replaced and should be, if worn.
Also look for looseness between the coupler and its connections to the shift
rod and the transmission. Connection to the transmission is fastened with a
set screw which fits into a detent. As long as it's in tight in the detent,
there should be no movement there. However, the connection to the shift rod,
which comes to the coupler from the shifter, is fastened by a clamp & bolt
on a very fine spline. I've seen slippage there which caused horrible
shifting and required tightening.

Once you've determined how much, if any loss of movement there is through
the coupler, any additional movement at the shift lever that does not
produce movement at the coupler is caused by wear in the linkage at the base
of the shift lever. There is a cup and a bushing up there which are both
wear items and can/should be replaced.

If all that stuff is tight, then there's still the possibility that the
linkage needs alignment, which is a more tedious process than I can describe
here. if not linkage alignment, than there are a bunch of potential
adjustments and wear items inside the transmission. If you get to that
determination, I suggest you find a good Porsche mechanic to do that work.

Hopefully, this helps you in the right direction.


--

Mark Hald
'77 Carrera 3.0
http://members.renn­list.com/hald


"rooster`" <rooster`@mymail.co­m> wrote in message
news:xr08e.1028909$­Xk.200559@pd7tw3no..­.> Hi. I've got a beautiful looking red/black 911 SC Targa that I have owned > for the last 5 years. A couple of years ago I had the gear shift lock up > to the point that it had to be towed. It just wouldn't get into gear. It > cost me a whole new set of brake calipers and I was told that they > couldn't find any problem once they got it unlocked. Just the previous > year I had recently had my mechanic install a rebuilt transmission. When > I took my car out of storage recently I noticed that it sort of clunked > when shifting into second and third. Never any problem downshifting or > going into 4th or 5th. I took it to my mechanic who said he thinks I just > don't know how to shift or possibly the clutch. He adjusted the clutch > but no difference and besides I had never had this problem about the > clunking before and if it is the clutch why woudldn't it do it going into > the other gears too? Tonight it almost locked up on me again. I was on a > slight incline (same as previous time) only this time with some real grunt > work (really pushing hard to get it all the way to the right and down) it > managed to unlock and was able to get home okay. I'm thinking about > taking into another mechanic to get another opinion but was wondering if > any of you might have an idea. Much appreciated. Thanks


Add comment
Rooster` 18 April 2005 10:01:23 permanent link ]
 Mark wrote:> As said by William, it's impossible to diagnose from here, but it's fair to > say that what you're seeing isn't normal, even by 915 standards. ;^)>
As suggested, linkage is where I'd begin. Unless it's been refreshed in > recent years, it's probably due. They all seem to wear out and the shifting > gets very imprecise. It's easy to check and repair. The parts are among the > least expensive you'll buy for your 911.>
Under the carpet in the rear, atop the hump & right in front of the rear > seat, there is an access cover held in place with four screws. Remove that > and you have access to the rear shift coupler. While looking down in there, > reach forward and move the shift lever slowly in different directions, > looking for corresponding movement through the coupler. The coupler is a > small universal joint and it has hard rubber/plastic bushings which elongate > and introduce slop. Those bushings can be replaced and should be, if worn. > Also look for looseness between the coupler and its connections to the shift > rod and the transmission. Connection to the transmission is fastened with a > set screw which fits into a detent. As long as it's in tight in the detent, > there should be no movement there. However, the connection to the shift rod, > which comes to the coupler from the shifter, is fastened by a clamp & bolt > on a very fine spline. I've seen slippage there which caused horrible > shifting and required tightening.>
Once you've determined how much, if any loss of movement there is through > the coupler, any additional movement at the shift lever that does not > produce movement at the coupler is caused by wear in the linkage at the base > of the shift lever. There is a cup and a bushing up there which are both > wear items and can/should be replaced.>
If all that stuff is tight, then there's still the possibility that the > linkage needs alignment, which is a more tedious process than I can describe > here. if not linkage alignment, than there are a bunch of potential > adjustments and wear items inside the transmission. If you get to that > determination, I suggest you find a good Porsche mechanic to do that work.>
Hopefully, this helps you in the right direction.>
Thanks, it does. I'm going to take it into a local Porsche repair shop
(not the one I usually deal with) and have a chat with them. This
certainly gives me some ammunition to help prevent me from being taken
to the cleaners. Best regards.......
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CarGuru > Porsche > 1982 Porsche 911 gear box problem 18 April 2005 10:01:23

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