2000 C2 Tiptronic slipping in fourth gear

[wyovino]

I took it to my trusted indy who then referred me to a transmission place he works with.  The car has a 200-300 rpm slippage in fourth gear if you blip the throttle or when it changes gears. They have had the car for eight days now and I'm not getting a warm feeling about this. He is going to get back to me later today with a price for some tuning kit (don't remember what it's called).

 

I don't know when or if it's ever had routine service. The car has 62000 miles on it and I bought it at 37000.  He says the fluid looks very good.

 

Should I bite the bullet and take it to my local Porsche dealer?

[JFP in PA]

If the Tip has never been serviced, I would do a fluid and filter change now.  If the trans does not respond to that, there is an organic problem.  Does either your Indy or the trans shop have a Porsche scan tool to go through the Tip?

[wyovino]

I'm not certain but I assume so as he was able to read codes from the Tip. I'll get more info when he calls back but he seemed to think it was a physical problem and not due to the fluid. 

 

Unfortunately I have no knowledge about the workings of an automatic transmission, so he could tell me that the unicorn broke its leg and I would ask "How much for a new unicorn?"

Edited April 6, 2016 by wyovino

[JFP in PA]

I'm not certain but I assume so as he was able to read codes from the Tip. I'll get more info when he calls back but he seemed to think it was a physical problem and not due to the fluid. 

 

Unfortunately I have no knowledge about the workings of an automatic transmission, so he could tell me that the unicorn broke its leg and I would ask "How much for a new unicorn?"

 

These Tips use several electronically controlled solenoid valves internally which are well known for developing problems, and one of the reasons why we recommend fluid and filter changes much sooner than the factory does.

[wyovino]

The plan is to pressure test some stuff and do a fluid and filter change. If necessary, he will put in a Sonnax valve body (or something like that). He's taking a conservative approach rather than just throwing parts at it.

[wyovino]

Update. The transmission guy says that it will eventually need a rebuild (around $6k) and that I should just live with it for now. It has minor slippage in fourth gear which is much less noticeable in manual. Pressure tests were all good, but it will eventually need a clutch pack.  They did a normal service (fluid and filter) and sent me on my way.  I'm happy that they didn't just throw parts at it but a little bummed that it's not fixed.

 

Can a 2000 ZF Tiptronic be reprogrammed using a Durametric or is that only doable with Piwis?

[JFP in PA]

Can a 2000 ZF Tiptronic be reprogrammed using a Durametric or is that only doable with Piwis?

 

Depends, what are you trying to do?

[wyovino]

The transmission guy said that it would be better if the shifts were spaced farther apart. In auto mode, you can be doing 35-40 and be in fifth gear.

[JFP in PA]

The transmission guy said that it would be better if the shifts were spaced farther apart. In auto mode, you can be doing 35-40 and be in fifth gear.

 

A Durametric is not going to help you with that; and I'm not sure how much the PIWIS or PST II can alter those as well.

[wyovino]

Thanks. I appreciate the feedback.