kinka17 Posted June 3, 2011 Share Posted June 3, 2011 Hi. I have a 98 Legacy outback 2.5. I just rebuilt the transmission on this car, so I know its not transmissions related. I'm having trouble with a harsh 1-2 shift, and late upshifts after. It doesn't do it all the time, but i have discovered its because of a voltage drop to the transmission that causes it. I have tried all the following: New MAF, dropping resister, NEW TPS, used TCM and I have traced all the wires for HOURS, and see nothing grounded or cut. I have no idea what could be causing this. Any ideas, no matter how crazy, are appreciated. Link to comment Share on other sites More sharing options...
Cougar Posted June 3, 2011 Share Posted June 3, 2011 If you are sure that the trouble is due to a problem with the power to the transmission area then you need to trace back the wiring that ties to the problem area and look for a connection problem. Link to comment Share on other sites More sharing options...
nipper Posted June 4, 2011 Share Posted June 4, 2011 ALWAYS replace one part at a time, if that does not solve the issue, put the original part back on, otherwise it can make it impossible to diagnose properly. Go back and unplug then plug all the connectors in again. Do you have the VSS operating properly and the MAP sensor working? Link to comment Share on other sites More sharing options...
kinka17 Posted June 4, 2011 Author Share Posted June 4, 2011 Well I found it. The ground on top of the intake manafold was causing my voltage drop. Not sure how it got loose, but I could wiggle it with my hand. I tightened it up and no more problems. Link to comment Share on other sites More sharing options...
Cougar Posted June 4, 2011 Share Posted June 4, 2011 Good job. Bad grounding can cause all kinds of strange issues. Thanks for the update. Link to comment Share on other sites More sharing options...
Recommended Posts
Please sign in to comment
You will be able to leave a comment after signing in
Sign In Now