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Registered
Join Date: Jan 2003
Location: the beach
Posts: 5,149
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Problem with 1970 901 clutch
I have a 1970 911E with the original 901 tranny with the pull-type clutch, unique to model years 1970 and 1971.
While shifting yesterday, the clutch peddle suddenly fell almost to the floor, and a loud, rapid, metallic, ratcheting sound came from the tranny. The sound was there in neutral. I quickly shut the engine off and got towed home. The clutch cable still has a little tension it it. It now rests about 2 inches short of being fully depressed. I took the wheel off and had a look today. The cable is obviously loose, but nothing appears broken. Where the cable makes its upward loop, I think it should go higher. I can push the cable straight upward and move the fork. I think the loose fork caused the ratcheting noise. Why would the clutch cable come loose so suddenly like that? And how can I fix it? Also, I may need that traveling mechanic that works in the Bay Area. I don't want to tow it. Anyone have is name and number?
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Charlie 1966 912 Polo Red 1950 VW Bug 1983 VW Westfalia; 1989 VW Syncro Tristar Doka |
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06-17-2008, 03:38 PM
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Location: Dublin, CA
Posts: 6,273
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The type 911 tranny ('70-'71 901) has a pivot bolt on which the clutch fork rides. If the bolt breaks, the pedal will drop. Check the clutch fork. If it is loose side-to-side, this bolt may have broke.
Do a search under "Tom Amon" - he is the local Bay Area mechanic that would travel to you home and work on your Porsche.
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Sergio The GT Lid Whisperer PCA 42yrs - National DE Instructor / Ex-RGruppe #197 '19 718 Cayman S (9th Porsche/1st with PDK) '14 Subaru Forester XT (Porsche support vehicle) |
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06-17-2008, 03:47 PM
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+1 for the pivot bolt. Otto's has better alloy ones available. Motor will have to come out to access
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1970 914-6 street"evil cockaroach" 1970 911 Targa "ST" Jade Green IROC Tribute (ready to race) |
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06-17-2008, 04:34 PM
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Fahren mit dem Wind.
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+1,000,000 for the pivot bolt! Had the same thing happen on my 70S 3 years ago - my earlier posts here. You have to pull the engine to access it. Use the 71 part, it will not have the same problem. The 70 pivot nut screws loose (part 11 in the following diagram). Here is a drawing from another set of posts.
On the plus side, this was the event that led to my meeting Chris Bennet who came over to help me pull the engine. We also learned that using a hydraulic lift is not a good way to do an engine drop  Cheers, Michael
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Keeper of the 1983 911SC Cabriolet Registry (http://911sccabrioletregist.freeforums.net) Caregiver to: 1983 911 SC Cabriolet - Fahern mit dem Wind. (Moss Green Metallic over Champagne and Brown Leather) Last edited by mhackney; 06-17-2008 at 04:50 PM.. |
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06-17-2008, 04:47 PM
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Location: the beach
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The clutch fork is very loose side to side. The engine's coming out. I've dropped the engine twice before, so it won't be a big problem. Oh well. Thanks for the great advice, guys.
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Charlie 1966 912 Polo Red 1950 VW Bug 1983 VW Westfalia; 1989 VW Syncro Tristar Doka |
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06-17-2008, 05:59 PM
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Fahren mit dem Wind.
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It was a $5 fix and hours of work! I took the opportunity to powder coat my sheet metal and replace oil sensors, gaskets, etc "while I was in there". The design of the 71 pivot is so much better. Just another way our 70s are "unique".
cheers, Michael
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Keeper of the 1983 911SC Cabriolet Registry (http://911sccabrioletregist.freeforums.net) Caregiver to: 1983 911 SC Cabriolet - Fahern mit dem Wind. (Moss Green Metallic over Champagne and Brown Leather) |
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06-17-2008, 06:06 PM
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1962 Porsche 356B Roadster S 90
