Hi Guys,
Just had a used auto box fitted to my 1999 is200. Apart from the dead transmission, the car was previously running very well. As soon as I picked the car up from the shop I noticed that the revs were getting stuck around 2500rpms and holding there for around 3 seconds before a sudden burst of power. After running through 1st gear it would the jerk into second as the revs went below 2500rpms and would have to bust through this flat spot again.
Took it back to the mechanic who was very good about it. He put the scan tool on but everything tested fine: tb motor, tb position sensor, o2 sensors, map sensor etc. He feels that it could be the transmission but I took it to a trans place who confirmed that it was ok.
The mechanic and I have exhausted all ideas.... i've even combed this site post by post looking for answers.
Please help!!!