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Registered User
Join Date: Aug 2010
Location: Küsten, Germany
Posts: 175
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911 and 915 Differential same?
Hi there,
just being far away from my workshop and stock a question strikes my mind which i hope you can answer: 901 gearboxes and 911('70-'72) had different differentials. How about 911 and 915? Do the diffs have the same outer dimensions, i.e. are they interchangeable? Thanks and greets, Robert |
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02-03-2015, 03:35 PM
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Max Sluiter
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As far as I know the 911 and 915 differentials are interchangable.
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1971 911S, 2.7RS spec MFI engine, suspension mods, lightened Suspension by Rebel Racing, Serviced by TLG Auto, Brakes by PMB Performance |
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02-03-2015, 05:25 PM
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Registered
Join Date: Jan 2003
Location: Annapolis MD
Posts: 1,020
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i agree ... they did have different style splines early (coarse) vs late (fine) but can be interchanged if they have the appropriate shafts.
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02-03-2015, 06:57 PM
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gearhead
Join Date: Nov 2007
Location: Loverland, CO
Posts: 23,516
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Yes and no. '72-74 915 with 7:31 cwp uses the same differential as a mag case 901(69 only),911(7071)&914 gearbox.
When they went 8:31 the ring gear offset changed. The course spline middie differential is not a direct fit. |
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02-04-2015, 06:08 AM
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Registered User
Join Date: Aug 2010
Location: Küsten, Germany
Posts: 175
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Great info.
so i would need an early 915 (i assume the non upgraded one with the uneasy input shaft seal exchange) to be able to interchange said 911 diff? Thanks and greets, Robert |
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02-04-2015, 04:52 PM
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1971 Porsche 911S
