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86 Carrera axle replacment

Transmission and Clutch

Vehicle Information: Model: Carrera; Year: 1986; Body Type: Coupe; Engine (type, size, modifications): 3.2; Total Mileage: 119000;

I was about to put my 86 Carrera in the shop for rear axle replacement, but after a moment of thought, decided instead to do the work myself. Are there any significant pitfalls to this task that fall into the "whatever you do....." category? I've done a ton of work on cars in the past, replacing engines and anything else that comes up, but aside from brakes, haven't done a significant amount of work on a Porsche.FYI, the axle replacement is being done to hopefully cure a harmonic noise in the driveline that's timed to wheel rotation (not engine RPMs). It's a subtle, low-pitched whrrr.....whrrr.....whrrr... that's especially evident when cruising or even rolling the car downhill with the clutch depressed. Don't hear any change during a turn. I've considered it being road noise from the tires, but I'd think that would change depending on road surface, and this noise seems constant in nature, regardless of surface. Have shaken the wheels, and don't detect wheel bearing problems.Thanks

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