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Registered
Join Date: Sep 2021
Location: San Diego, Ca.
Posts: 4
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901 to 915 transaxle swap in 1967 912/911’s
Ok guys and gals, I have a question for those of you with much more knowledge about this that I have.
I have a 1967 911 (born as a 912) with a freshly rebuilt 2.7L out of a 1976 911S. My current 901 has customized gear ratios, which I no longer like, and is in need of rebuild. Many years ago, when I rebuilt that 901 transaxle, I used to regularly take 500-1000 mile road trips and had a long ratio transmission built for for top speed driving from San Diego to Las Vegas as well as a super low granny gear to handle stop and start driving on steep San Francisco hills. Now I have other cars for that kind of driving and want a more traditional gear ration set up. Because I have the bigger motor, I am planning on putting a 915 transaxle with LSD and light weight clutch assembly (both of which I already own) to better handle the additional horse power. I know that there will be some metal work required to fit it in. Does anyone have a diagram or pictures of where the metal will need to be worked? Also, I need to replace one (possibly both) of my rear seat pans due to rust. Because of the transaxle change could I solve the metal bending problems by installing later seat pans with, I am assuming, a higher hump in the middle? I.E. Would a later set of seat pans fit right in and solve my metal bending problems? Any words of wisdom would be greatly appreciated… Last edited by CEOSOON; 12-13-2023 at 01:03 PM.. |
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12-13-2023, 12:45 PM
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The 9 Store
Join Date: Dec 2009
Location: Wilmington, DE
Posts: 5,313
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I’m putting a 3.2 with a 915 in my 67-912. I took an empty 915 trans case, bolted it up to the car, and clearanced (read - hit the tunnel with a big hammer) where the trans hit and needed room. It took 15 minutes and didn’t need much. I used an empty case since it was just easier to handle than a 120-150 lb trans. Overall, it was quick and easy.
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All used parts sold as is. |
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12-13-2023, 01:13 PM
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Registered
Join Date: Sep 2021
Location: San Diego, Ca.
Posts: 4
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Excellent idea... The thought of lifting the trans in and out repeatedly until it fit sounds horrible.
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12-13-2023, 07:29 PM
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The 9 Store
Join Date: Dec 2009
Location: Wilmington, DE
Posts: 5,313
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Yea, see if you can find an empty case from a shop. Bolt on the trans cross mount. Then you can prop it up with a cardboard box while you make adjustments. Where it touches, hit it with a sharpie and then use your hammer to make some space. I could see the “adjustments” from inside the car but the carpet ( I’m doing a rear seat delete) will easily cover up the bumps.
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All used parts sold as is. |
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12-14-2023, 08:27 AM
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Registered
Join Date: Mar 2007
Location: Rockville, MD
Posts: 790
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I had a similar issue with putting a 911 (1970) gearbox in a '72 chassis. It also need some hammer adjustment.
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12-14-2023, 10:18 AM
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