 Clutch Cable replacement diagram or Transmission Problem |
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| juliomagdaleno |
 Mar 22 2013, 12:28 PM
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#1
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Newbie  Group: Members Posts: 24 Joined: 8-January 13 From: austin Member No.: 15,350 Region Association: None  |
I have a 1974 porsche 914 2.0 with a clutch problem. It was parked for several years and when i started back up, the 1st and reverse gears were grinding when putting it in gear. I got underneath the car, replaced the shifter bushing and adjusted the clutch cable, problem solved for 2 days. First the car started ginding again in 1st and reverse. Now it will not let me put it in any gear. I am going back underneath the car this week to look at the clutch cable, does anyone have a diagram and how much it should move when pedal is pushed. Any other ideas or anyone have this problem before. Thanks
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Replies(1 - 19)
| ThePaintedMan |
Mar 22 2013, 12:36 PM
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#2
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Advanced Member Group: Members Posts: 3,886 Joined: 6-September 11 From: St. Petersburg, FL Member No.: 13,527 Region Association: South East States 
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Search "broken clutch tube" on here. You're in for some welding buddy!
(IMG:style_emoticons/default/welcome.png) |
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| TheCabinetmaker |
Mar 22 2013, 12:47 PM
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#3
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I drive my car everyday Group: Members Posts: 8,300 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
Which bushing did you change? Since it shifted good for 2 days I'll bet the cone screw has backed out. Some folks say they are only a one time use, but I've found blue locktite holds them just fine.
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| ThePaintedMan |
Mar 22 2013, 12:55 PM
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#4
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Advanced Member Group: Members Posts: 3,886 Joined: 6-September 11 From: St. Petersburg, FL Member No.: 13,527 Region Association: South East States
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QUOTE(The Cabinetmaker @ Mar 22 2013, 02:47 PM)  Which bushing did you change? Since it shifted good for 2 days I'll bet the cone screw has backed out. Some folks say they are only a one time use, but I've found blue locktite holds them just fine. Yes, but he had a problem before that with it grinding going into gear. He adjusted the cable and it came back. Could be a cone screw, and Curt, your knowledge far surpasses mine, but I think that sounds more like a clutch tube ripping from its mounts. |
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| TheCabinetmaker |
Mar 22 2013, 01:00 PM
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#5
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I drive my car everyday Group: Members Posts: 8,300 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
QUOTE(ThePaintedMan @ Mar 22 2013, 01:55 PM) QUOTE(The Cabinetmaker @ Mar 22 2013, 02:47 PM) Which bushing did you change? Since it shifted good for 2 days I'll bet the cone screw has backed out. Some folks say they are only a one time use, but I've found blue locktite holds them just fine. Yes, but he had a problem before that with it grinding going into gear. He adjusted the cable and it came back. Could be a cone screw, and Curt, your knowledge far surpasses mine, but I think that sounds more like a clutch tube ripping from its mounts. He also changed a bushing which means he had at least one cone screw out. Hard to say which cured the problem when you perform two fixes at the same time? (IMG:style_emoticons/default/beerchug.gif) |
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| Dr Evil |
Mar 22 2013, 03:13 PM
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#6
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Send me your transmission! Group: Members Posts: 22,999 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region
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Anytime reverse grinds it means that your clutch is not releasing completely. So, this means that cable/tube/etc external to the transmission is the issue.
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| juliomagdaleno |
Mar 22 2013, 04:11 PM
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#7
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Newbie Group: Members Posts: 24 Joined: 8-January 13 From: austin Member No.: 15,350 Region Association: None |
looks like I have a project for this week, will keep everyone posted to see what I find. thanks
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| 76-914 |
Mar 22 2013, 04:40 PM
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#8
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Repeat Offender & Resident Subaru Antagonist Group: Members Posts: 13,502 Joined: 23-January 09 From: Temecula, CA Member No.: 9,964 Region Association: Southern California
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You can located which end is loose then drill an 1.25" hole slightly above it allowing you to insert a U bolt over the tube and back thru the tunnel wall. I was going to weld mine up before this conversion began but won't need it now. If its the front that tore loose I can get you a pic and the dimension to drill if you don't want to weld it. If you weld it take care not to weld the cable inside the tube. (IMG:style_emoticons/default/welder.gif)
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| jdlmodelt |
Mar 22 2013, 04:52 PM
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#9
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James D. Lane Group: Members Posts: 345 Joined: 30-November 12 From: Colorado Member No.: 15,210 Region Association: Southwest Region |
Try adjusting the cable some more. I had to do mine a couple of times back to back like that.
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| juliomagdaleno |
Mar 22 2013, 09:21 PM
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#10
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Newbie Group: Members Posts: 24 Joined: 8-January 13 From: austin Member No.: 15,350 Region Association: None |
QUOTE(jdlmodelt @ Mar 22 2013, 02:52 PM) Try adjusting the cable some more. I had to do mine a couple of times back to back like that. I cant adjust the cable anymore, it was almost at the end. |
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| juliomagdaleno |
Mar 22 2013, 09:22 PM
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#11
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Newbie Group: Members Posts: 24 Joined: 8-January 13 From: austin Member No.: 15,350 Region Association: None |
QUOTE(76-914 @ Mar 22 2013, 02:40 PM) You can located which end is loose then drill an 1.25" hole slightly above it allowing you to insert a U bolt over the tube and back thru the tunnel wall. I was going to weld mine up before this conversion began but won't need it now. If its the front that tore loose I can get you a pic and the dimension to drill if you don't want to weld it. If you weld it take care not to weld the cable inside the tube. (IMG:style_emoticons/default/welder.gif) Can you send me pics, would like to see what my easy option is, thanks |
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| JawjaPorsche |
Mar 22 2013, 09:33 PM
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#12
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Advanced Member Group: Members Posts: 3,463 Joined: 23-July 11 From: Clayton, Georgia Member No.: 13,351 Region Association: South East States |
Between Clutch Cable End Clevis and adjustment nuts, I have a 1/2 inch long metal sleeve so I can adjust the cable more. Does your cable have the barrel like sleeve? You can use a bunch of small washers but a sleeve works the best.
Did you put a new clutch cable when you replace the bushings? They will stretch then break at the worst times. Ask me how I know! Even a new one will stretch a little after a few days of use. Which might explain why yours worked for a few days. I would try this before tearing into your clutch cable tubes in the floorboard. |
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| Mike Bellis |
Mar 22 2013, 11:08 PM
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#13
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Resident Electrician Group: Members Posts: 8,345 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None 
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I have also seen the disc rusted to the pressure plate after sitting for years. This could cause your symptoms.
Most likely you have a stretched cable. You could try a larger nut as a spacer under the adjusting nut. If you can then adjust and make it work, you know the cable stretched. |
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| juliomagdaleno |
Mar 23 2013, 05:27 AM
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#14
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Newbie Group: Members Posts: 24 Joined: 8-January 13 From: austin Member No.: 15,350 Region Association: None |
QUOTE(JawjaPorsche @ Mar 22 2013, 07:33 PM) Between Clutch Cable End Clevis and adjustment nuts, I have a 1/2 inch long metal sleeve so I can adjust the cable more. Does your cable have the barrel like sleeve? You can use a bunch of small washers but a sleeve works the best. Did you put a new clutch cable when you replace the bushings? They will stretch then break at the worst times. Ask me how I know! Even a new one will stretch a little after a few days of use. Which might explain why yours worked for a few days. I would try this before tearing into your clutch cable tubes in the floorboard. I bought a new cable and was going to install it. |
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| Spoke |
Mar 23 2013, 05:49 AM
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#15
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Jerry Group: Members Posts: 6,978 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None
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Post a picture of the firewall from under the engine where the clutch cable enters the cabin. With this pic, it can be confirmed if the clutch tube is attached properly.
2 general reasons why you have to adjust the cable only days apart are a stretching and ready-to-break clutch cable and the clutch tube in the cabin is loose. |
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| juliomagdaleno |
Mar 23 2013, 08:11 AM
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#16
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Newbie Group: Members Posts: 24 Joined: 8-January 13 From: austin Member No.: 15,350 Region Association: None |
QUOTE(Spoke @ Mar 23 2013, 03:49 AM) Post a picture of the firewall from under the engine where the clutch cable enters the cabin. With this pic, it can be confirmed if the clutch tube is attached properly. 2 general reasons why you have to adjust the cable only days apart are a stretching and ready-to-break clutch cable and the clutch tube in the cabin is loose. here is some quik pictures, will start working on this later today to see what the problem is. Attached thumbnail(s)  
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| Cap'n Krusty |
Mar 23 2013, 09:01 AM
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#17
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
QUOTE(ThePaintedMan @ Mar 22 2013, 11:55 AM) QUOTE(The Cabinetmaker @ Mar 22 2013, 02:47 PM) Which bushing did you change? Since it shifted good for 2 days I'll bet the cone screw has backed out. Some folks say they are only a one time use, but I've found blue locktite holds them just fine. Yes, but he had a problem before that with it grinding going into gear. He adjusted the cable and it came back. Could be a cone screw, and Curt, your knowledge far surpasses mine, but I think that sounds more like a clutch tube ripping from its mounts. No, it COULD NOT be the cone screw. Based on his description, his issue is grinding due to poor clutch disengagement, NOT being unable to find the gears. The Cap'n |
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| crresind |
Mar 23 2013, 09:38 AM
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#18
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Newbie Group: Members Posts: 13 Joined: 8-June 04 From: Oceanside, California Member No.: 2,175 Region Association: Southern California |
Judging by the bottom picture, I would say that the clutch cable tube has come loose. There is rust evident at the bottom seam of the floor where the tube is welded to to the vertical wall. this could cause the tube in the tunnel to work back and forth with each disengagement, that then causes the tube to come loose further forward in the tunnel. I would not be surprised if the tube is moving at both ends. Welding is in order.
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| juliomagdaleno |
Mar 24 2013, 03:32 PM
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#19
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Newbie Group: Members Posts: 24 Joined: 8-January 13 From: austin Member No.: 15,350 Region Association: None |
 I took the cable out, it looks like the black casing has shrank on both sides because of the pressure. The cable I bought on line of course is the wrong cable, ordered a new replacement from auto Atlanta. I attached pictures of the cable, hope the new one works, will keep everyone posted when I get the new cable. The tubes were not broken. |
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| juliomagdaleno |
Mar 29 2013, 08:18 AM
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#20
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Newbie Group: Members Posts: 24 Joined: 8-January 13 From: austin Member No.: 15,350 Region Association: None |
Got my new cable and it was the right one. I installed the cable and noticed another problem that could also be the cause of my problem. The bushings on the pedal assembly need to be replaced. The pedal has movement. Going to the porsche dealer now to pick up the new bushings. If its not one thing, its another. Just want to get it repaired to drive this weekend.
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