Mazda Motor Corp. reports that some 2005-08 Tribute SUVs with automatic transmissions may stall when coming to a stop or when shifted from park to drive or park to reverse.
According to the car maker, the condition can be intermittent, and most often occurs after an extended drive. A lockup torque converter stuck in the locked position is the likely cause of the trouble.
To confirm the diagnosis, connect your scan tool, access the data stream and look at PID TC_SLIPACT as the stall occurs. If the slip in the transmission is greater than 20 rpm in drive or reverse, you're most likely dealing with an engine issue. If the slip is less than 20 rpm, the converter clutch is at fault.
Replacing the torque converter with an improved version, part No. ZZCA-19-100, should eliminate further stalling issues.
"Factory Fixes" is written by Jim DePalma, a 30-year veteran of the auto repair business who has served stints as a service manager, parts manager and ASE-certified technician. His column provides vehicle manufacturers' authentic factory technical service bulletins (TSBs) that have been condensed for easier reading. Mr. DePalma advises that techs always check with a dealer or repair information system for the latest revisions before starting to work on a vehicle. He can be reached via e-mail at [email protected].