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Stranger on the Internet
Join Date: Apr 2004
Location: Bradenton, FL
Posts: 3,244
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Rebuilt 915 won't shift
I had my 915 rebuilt last year. Car is still on the same jackstands as when I reinstalled the transaxle. I also converted to EFI, did some other stuff and generally moved at a non-urgent pace.
An issue I noticed is that it will not shift onto any gear when it is running. This is in addition to a few other transaxle related issues, but it is my main concern at the moment. It shifted OK when I tested it before I put it in the car. It just will not go into any gear with the engine running. I don't think I screwed anything up installation-wise, but is it possible to put it in so that it will not shift? Any input will be helpful. TIA. BTW, it has a brand new Sachs Power Clutch, and has been adjusted. At least I still have the shipping crate I built.
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Patrick E. Keefe 78 SC |
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08-11-2018, 05:54 PM
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Registered
Join Date: Jun 2017
Location: doylestown, pa
Posts: 699
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Have you checked the shift coupler?
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08-11-2018, 06:12 PM
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Stranger on the Internet
Join Date: Apr 2004
Location: Bradenton, FL
Posts: 3,244
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I will be checking the shift linkage thoroughly tomorrow.
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Patrick E. Keefe 78 SC |
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08-11-2018, 06:45 PM
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Under the radar
Join Date: May 2007
Location: Fortuna, CA. On the Lost Coast near the Emerald Triangle
Posts: 7,129
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Clutch is stuck or not adjusted correctly.
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Gordon ___________________________________ '71 911 Coupe 3,0L outlawed #56 PCA Redwood Region, GGR, NASA, Speed SF Trackrash's Garage :: My Garage |
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08-11-2018, 06:53 PM
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Registered
Join Date: Oct 2008
Location: Nash County, NC.
Posts: 8,516
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Check the release fork to insure it’s engaged to the TOB
If it’s not engaged, it is now defective and needs replacing because the opening is suposed to be 75mm and will measure 80mm Bruce |
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08-12-2018, 03:14 AM
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Stranger on the Internet
Join Date: Apr 2004
Location: Bradenton, FL
Posts: 3,244
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I could be wrong, but the car is on jackstands, so there is no load on the power engagement. I should simply be able to shift it without even using the clutch. It does not want to select any gear at all.
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Patrick E. Keefe 78 SC |
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08-12-2018, 03:32 AM
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Registered
Join Date: Jan 2015
Location: Stow, MA
Posts: 580
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Dragging clutch.
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08-12-2018, 05:16 AM
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Registered
Join Date: Oct 2001
Location: San Carlos, CA US
Posts: 5,529
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Engine off, if you can shift into all gears, then the problem is not in the gear box.
Engine running, if you depress the clutch, and you cannot shift into any gear, then the clutch is not fully engaged. You need to adjust that.
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Porsche 2005 GT3, 2006 997S with bore-scoring Exotic: Ferrari F360F1 TDF, Ferrari 328 GTS Disposable Car: BMW 530xiT, 2008 Mini Cooper S Two-wheel art: Ducati 907IE, Ducati 851 |
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08-12-2018, 05:31 AM
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Stranger on the Internet
Join Date: Apr 2004
Location: Bradenton, FL
Posts: 3,244
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I finally had some time today to look at what I think may be a culprit, the shift coupler. I figured I'd adjust the shift mechanism before I start troubleshooting the clutch. The coupler bushings were almost completely disintegrated. I was going to just make some new ones on my little lathe, but said the heck with it and ordered some from our host. Maybe this will fix the shift issues.
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Patrick E. Keefe 78 SC |
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08-17-2018, 05:35 PM
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Registered
Join Date: Sep 2006
Location: A scenic and exhilarating drive along the Delaware River just one hour from Philadelphia, PA
Posts: 369
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If the coupler bushings were "almost completely disintegrated" that would be the first place to start repair. My hunch is if all coupler and shifter bushings are replaced and adjusted properly you will be good to go. Here is a link that may help a bit:
Shift Coupler & shift lever bushings replacement tutorial made easy-step-by- step |
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08-18-2018, 06:35 AM
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My Garage
1971 Porsche 911
Baja Bug
