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Has anyone had any experience with transmission Fluid leak on automatic, tiptronic 986, its by the front driver side tire, only about a half cup's worth.  The car is an 03 with 107k miles, I have had the ims bearing taken care of and replaced the rms, no oil leaks.   The air pump, fuel pump and aos have all been replaced with in the past 10k miles... at my last service mechanic stated that the transmission wiring harness would be the next thing to fail based on the mileage of the vehicle.  Has anyone had any experience w this? Could this be the cause of the leak? ... any insight would be appreciated

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Welcome to RennTech :welcomeani:

If you have an ATF leak near the front driver's side tire, something is seriously wrong as there is no ATF in the front of the 986 Boxster, it is all in the rear of the car, so it has to be something else leaking.

 

The Tiptronic ribbon cable is a common failure point on these cars, but it is also in the rear of the car.

 

Are you sure it is ATF?

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Are you sure your leak is ATF? There is no source for ATF leak near the front of the car. It may be dripping from the back and pooling on the under cover but the actual leak would have to be somewhere in the rear if it is coming from the transmission.  My other guess is that it could be power steering fluid. 

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I've seen more than a few Boxsters with a leaking steering rack and power steering fluid on the ground.

Quite a bit of work to replace a leaking rack - so inspect it and make sure it is not just a fitting first.

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