Some info regarding the Boxster tip.
1997-1999 Porsche Boxster: Model A86/00
2000-2004 Porsche Boxster: Model A86/05
2000-2004 Porsche Boxster S: Model A86/20
designed and built by ZF Friedrichshafen AG's subsidiary in Saarbrücken
The generic and base model name for the trans for buying parts and referencing is
ZF 5HP-19
ZF 5HP19 transmission - Wikipedia, the free encyclopedia
Introduced in 1996, it is still in production, and has been used in a variety of cars from Audi, BMW, Porsche, and Volkswagen Passenger Cars. in modified configurations it is used in all wheel drive audis.
Weak points are the torque converter bushing and the cooling valve. Be careful when replacing the hose leading to the cooling valve as the aftermarket replacement nylon hoses will melt and not allow the trans to cool and will allow the trans to overheat. If you have a trans leak at the bell housing do not just replace the torque converter seal. check to see if the bushing is worn out because if it is worn out, you will be just wasting your time replacing the seal.
Most of the time you will not find much info in the porsche forums relating to these, but if you go to the other forums where this transmission is used like the BMW forums you will find all the issues these trans are known for. They actually have guys tearing down and rebuilding these transmissions, and posting repairs.
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