CjLj0223 Posted September 24, 2014 Share Posted September 24, 2014 On my 2007 Legacy.... When I take off from a stop shifting from 1st to 2nd, and 2nd to 3rd, I have a surging symptom. At first I thought maybe I had a vacuum leak somewhere, but don't know if vacuum plays a part in this transmission. There is a fuse for the transmission control unit, so I figured maybe this control unit is something that could be failing, and something that can be replaced easily??? Not sure... Any ideas????? Quote Link to comment Share on other sites More sharing options...
1 Lucky Texan Posted September 25, 2014 Share Posted September 25, 2014 any work done to the car before this began? new tires or fluid changes? How old is the trans fluid? Have you checked the fluid level? Quote Link to comment Share on other sites More sharing options...
CjLj0223 Posted September 25, 2014 Author Share Posted September 25, 2014 No work done prior. Trans fluid has about 90K miles on it. Realizing that it needs to be serviced, I can't imagine that is the whole problem. CV boots are leaking a little, but keeping fluid level up until I can afford that project. Quote Link to comment Share on other sites More sharing options...
1 Lucky Texan Posted September 25, 2014 Share Posted September 25, 2014 (edited) no direct vacuum control of the trans - it's electronic. I'd try doing 3 drain/fill/drive briefly/repeat cycles to get mostly fresh fluid in there(only about 40% will drain from the trans plug, the rest is in the torque converter) - maybe try a CRC Trans-X treatment on the last fill. It has helped a lot of older transmissions last years longer than they would otherwise. Yours just seems to have problems earlier that it should. Do you have any warning lights on/flashing? Edited September 25, 2014 by 1 Lucky Texan Quote Link to comment Share on other sites More sharing options...
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