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On October 30, 2003, I posted a message regarding my 2002 non-turbo v70 surging at idle, in drive while stopped, for example at a traffic light. The car wanted to creep/jerk forward. I picked my car yestarday after it spent 3 weeks at the local Volvo dealership. I believe it's fixed!! Someone wanted the solution posted because they had the exact same problem. So here goes...
After I dropped the car off, the dealer told me there was nothing wrong with the car. I presuaded them to look at TNN 43-38, which was suggested in a response to my earlier post. The bulletin calls for the transmission valvebody to be replaced. So the dealership replaced the valvebody. They then said the transmission was really sick and would not shift properly. They called the Volvo Tech Line. Volvo said put another valvebody in. The dealership did and reported that the tranmission was still not shifting properly. The Volvo Tech Line then suggested replacing the transmission control module. The dealership did not have one in stock, so they moved on. The next suggestion was replace the transmission wiring harness. A new tranmission wiring harness was installed along with the orginal transmission valvebody. I picked up the car yesterday and have driven it about 100 miles. So far, it performs perfectly. It is rock solid while stopped at traffic lights.
The dealership freely admits that they don't know what fixed it. It's important to remember that when the valvebody is replaced, new seals are installed in the transmission. Also, of course the transmission fluid was drained, refilled and a new filter installed. One reason the transmission wiring harness was replaced was because the orginal had a connector cut off of it when it was removed. So, some combination of the transmission wiring harness and removing/replacing the transmission valvebody fixed this problem.
Once the dealership got started, they were persistant. So, I'm happy with them.
Hopefully, this will help someone else.
Best Regards,
Jeff
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