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My 2001 C4 Automatic had what appeared to slip (over rev) when making scarp turns, decided to replace transmission filter and refill, the first run after 10 minuets the transmission went into limp mode (lights on drive selector started to flash) check engine lamp came on (P0734 and P0734) was read. the reason given was input and output ratio wrong for both codes.
The Durmatic gave no other info. So I proceeded to order both input and output sensors. Since I couldn't confirm if a shift selonod was bad. Mean while I am in Cal for the holidays I remembered I moved two of the magnets in the pan there were 4 magnets 2 each in the depressions in the rear of the pan I took one each and moved the forward closer to the input and output sensors.
Anybody out there have any idea besides taking it to the dealer, at 75 bucks for the 5 liters of tranny oil each time I replace something to help me be smarter?
After 18yrs my convertible top has finally encountered its first issue. After using this forum (thank you!!) to figure out how to access all of the components (top was stuck in closed position), I found the root of my issue, a bad cable. However, as I was very carefully removing the cable from the transmission, the "clip" which is molded into the plastic cover cracked and is no longer functional (see image). Not really surprising on an 18yr old piece of plastic. The transmission works perfectly and I do not want to replace it, so I am looking for advice on any other ways that I can keep the cable properly engaged to the transmission. Please let me know if anyone else has encountered this and if there are any viable solutions. Thank you!
Hi everyone! I’m the proud new owner of a ‘99 Boxster 2.5L.
Recently, I noticed that when my transmission automatically shifts from second to third gear, it’ll jerk very slightly, as if the transmission is stuck for the briefest moment in second gear right before it shifts.
More noticeably, when I’m driving to slow down and breaking, as the transmission begins shifting from fourth to third and second, there is some jerking again—the sort of jerking you get when a transmission shifts into a slower gear and the car slows down suddenly because of the lower gear.
So when I’m slowing down, I will be going at a given speed, the car will downshift a gear, I will feel that sudden slow down, the car will run at a lower speed, downshift again, and I’ll feel that sudden slowdown again. This keeps happening until the car reaches second gear, of course.
Because of this, I recently had the transmission fluid changed. My mechanic showed me that the old transmission fluid was black and smelled like smoke, but that he hadn’t found any metal shavings so he thought the transmission was probably still okay. He told me to check in after a couple hundred miles to see if the transmission adjusts and drives better.
It’s been a hundred miles, and I’m still seeing this behavior—should I be worried, or is this common in tiptronics? I’m hoping that best case scenario, the car’s sensors are miscalibrated and the trans is downshifting at the wrong times (thus the gap between the speed it’s going at and the slowing down effect of a lower gear). Worst case would be having to buy a new transmission.
Please help! Would appreciate some advice or expertise.