SL55/63/65/R230 AMG: Transmission shifting question/problem
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Joined: Jul 2004
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04 SL55 (sold),05 SL55, 09 SL63, 07 C2S cab Porsche,
Transmission shifting question/problem
I have an 04 SL 55. Previously my transmission ECM was replaced because of internal transmission fluid leakage damaging it. Since then, I have noticed that when down shifting in auto mode, the RPMs go up before the "torque converter" grabs. Which is not unusual. However in this case, there is a significant pause (around 2 seconds) between pressing the accelerator and the downshift occuring. However, It is almost instantaneous when using the manual mode. I recently did the AMG challange and did not experience the same shifting problem on the SL55s there. The dealership where I take my car is horrible, but they are the only ones here. So, does anyone have any suggestions on what could be the problem internally with the transmission so I can point them in the right direction. Otherwise, I'm sure that I will as usuall, get the "we can't duplicate it" answer and have to drive around the shop forman for an hour.
Thread Starter
Member
Joined: Jul 2004
Posts: 209
Likes: 0
04 SL55 (sold),05 SL55, 09 SL63, 07 C2S cab Porsche,
tranny repaired
The car got a new master control unit, a valve housing as well as new wiring. All I can say is I can't believe I drove the car for 15k thinking things were OK. The difference is tremendous: Immediate kickdown and shifting. Seems like a totally new beast. If I had not done the AMG challenge I would not have known the difference.
