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2005 tranny rough shift

1K views 0 replies 1 participant last post by  retdguy78 
#1 ·
My wife's car is having some rough shifting problems, but only after the car is warmed up. 99500 miles. Trans fluid has been changed 3.5 qts at a time four times. Trans has never been flushed. LUCAS trans doctor helped smooth the shifting somewhat.

The dealer told me the car needed a new trans. He showed me a flowchart that the mechanic apparently followed. When a certain code appears in the diagnostic tester, flowchart stops there and says new tranny required. $3995.00 installed. Plus tax of course.

I can't seem to get any code related to drive train on my home tester. Frustrating.

I took the car to a local trans shop. He ran all the diagnostics he could and had different results. He told me the trans was OK; that the engine computer was sending the wrong signal to the trans. I had either a bad computer or faulty wiring.

Again, I couldn't get any codes at all on my home tester.

My question is, is this possible? Could it be a bad computer or a wiring fault?
 
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