Transmission Linkage Issues?, What's the current thinking on "renewing" linkage? |
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Transmission Linkage Issues?, What's the current thinking on "renewing" linkage? |
earossi |
Aug 31 2014, 08:57 PM
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#1
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Member Group: Members Posts: 210 Joined: 8-December 11 From: Chicago, Il Member No.: 13,878 Region Association: Upper MidWest |
As noted earlier, I have just taken delivery of my first 914 which has had both the engine and transmission "rebuilt". Unfortunately, I do NOT have the build history on either component. The engine seems to run very well. The transmission is another story. Shifting is very vague and it is HARD to shift the car. I have been able to work the tranny through all 5 gears, and there are no bearing noises or evidence of bad synchs. But, the linkage appears to be f****ed up pretty poorly. It takes a lot of force to move the shifter forward or rearward. And, hitting the correct gears is a bit of a hit or miss.
I have been able to research the Pelican site where there is a writeup by Wayne Dempsy on reworking the linkage and doing some adjustments. But, I wonder what else is out there. On this forum, I have seen references to some linkage articles in the archives, but have not been able to find much using the Search function. There are also several sources for replacement bushings, bearings, and hardware. But, what is the "hot ticket" to get the tranny to shift smoothly and with some ease? Though this is my first 914, my first Porsche was a 66 911 with a 901 tranny in it and I can remember it being a joy to shift. You could not speed shift the car, but it was very easy to shift. And, I am wondering if I can get the 914 side shift tranny to behave as did my 911? I can source hardware from Patrick MS, Tangerine Racing, Pelican, and Porsche......but, what should I replace and with whose part to get this tranny so that it is easily shifted? Right now, the car is a true PITA to drive simply because of the linkage or perhaps something internal to the tranny. Iwould like to work through a proper diagnosis and adjustment of the linkage first, to see if that fixes my problems. I kind of feel that the issue is linkage related, at this point. So, I would appreciate some direction from this forum. |
Dave_Darling |
Sep 2 2014, 04:09 PM
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#2
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914 Idiot Group: Members Posts: 14,991 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California |
I don't see the castle bushing on the side-shift console, no do I see an image of the firewall bushing. So I can't toss an opinion about what the material of the latter is, nor the condition of the former.
My recommendation is unchanged: Go through the linkage and put new bushings in it. (And new cone set-screws.) The Super Bushing Kit that Pelican sells is a pretty decent set of stuff for this. Slop will not get better on its own. It can only get worse. The stiffness may get better, but if so that is a separate issue from the linkage. Fix the linkage, put new bushings in. It may never shift as well as your old 911 did, though. --DD |
earossi |
Sep 2 2014, 04:48 PM
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#3
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Member Group: Members Posts: 210 Joined: 8-December 11 From: Chicago, Il Member No.: 13,878 Region Association: Upper MidWest |
I don't see the castle bushing on the side-shift console, no do I see an image of the firewall bushing. So I can't toss an opinion about what the material of the latter is, nor the condition of the former. My recommendation is unchanged: Go through the linkage and put new bushings in it. (And new cone set-screws.) The Super Bushing Kit that Pelican sells is a pretty decent set of stuff for this. Slop will not get better on its own. It can only get worse. The stiffness may get better, but if so that is a separate issue from the linkage. Fix the linkage, put new bushings in. It may never shift as well as your old 911 did, though. --DD Dave, I appreciate your response. But, I have to admit total ignorance of some of the terminology. I took pictures of the installation, attempting to capture everything; and, apparently did not get a thing referred to as a "castle fitting" or the shift "console". Perhaps you can give me some other verbiage that would allow me to find the "castle" fitting. I get it about the "console" though. As far as the firewall bushing, I noted that in my text. It is not a polymer. It is metallic and gold in color. So, my guess is that the bush is brass or bronze. And, lastly, I have not gone into the shifter in the cabin yet. That will be my next move, once I renew things at the transmission end of things. The transmission has fluid in it. Not sure what it is. But, I will dump it and put in something like Mobil 1 Synthetic which should improve shifting noticeably. |
Dave_Darling |
Sep 3 2014, 09:00 AM
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#4
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914 Idiot Group: Members Posts: 14,991 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California |
"castle fitting" or the shift "console". In reverse order: - The "side shift console" is the thingie that hangs off the side of the transmission that the rear shift rod goes into. That's where the coupler that has the socket bushing in it lives; the console usually has a black plastic cover over it. - The "castle bushing" goes in the hole through the side shift console, and the rear shift rod goes through this bushing into the middle of the console, where the aforementioned coupler slides onto it. I call it a "castle" one because the slots in it (to help it compress a bit and go partway through the hole in the console) look a little like a medieval castle's tower, if you squint hard and use your imagination. --DD |
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