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Tiptronic Shifter Hard When Hot

JP Rodkey

By JP Rodkey
in 986 Series (Boxster, Boxster S)

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JP Rodkey Member

JP Rodkey

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Posted

'98 newly installed transmission with less than 20k miles. Runs great, shifts well, paddles work.....smooth. After driving a few miles and engine gets up to normal, shifter becomes very hard to move. It's hard to move from D to P without feeling like something is going to break. Sometimes, it won't make it all the way to P unless I pull back and give it a lot of muscle. Disconnected shifting rod at the transmission shift shaft and it definitely feels like it's in the transmission itself. When the car cools down, all is normal. Durametric doesn't show transmission overheat, but when I checked the shift shaft it felt too hot (burnt my hand on the transmission case).

Coupled with this I've had a lot of fun trying to get all the air out of the cooling system. I'm still about 3/4 gallon short in the system, but coolant is no longer going down the expansion tank after several heat/cool cycles of the engine. I'm wondering if there is an air pocket in the heat exchanger mounted on the tranny?

Any ideas?

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JP Rodkey Member

JP Rodkey

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Posted (edited)

Well, I have an office only a few miles from the NA ZF facility that remanufactures these transmissions. Guess I'll pay them a visit this week and dig up an expert. Heck, maybe I can even swing a tour? If anyone has a question they'd like answered, feel free to post and I'll be happy to ask.

Edited by JP Rodkey
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