Wednesday, November 7, 2012

PO740- Torque converter clutch circuit malfunction


Many Honda and Acura owners encounter problems with their automatic transmission.  The most common malfunction found in a hondamatic transmission is trouble code PO740 Torque converter clutch circuit malfunction.  This code can be retrieved by any OBDII scan tool.  Contrary to popular belief, a transmission code can be stored in the TCM even though a "check engine" light may not be present.
Common symptoms of torque converter malfunctions in Honda or Acura transmissions include a chatter in the drivetrain, whining noise from transmission, and delayed engagement into 1st gear and/or reverse.  Unfortunately, if your vehicle is experiencing this problem than you are showing early signs of torque converter failure.  Once the torque converter clutch lining begins to wear it becomes embedded into the filter, causing a lack of lubrication to the rest of the transmission's components.  Since the design of the transmission does not allow for replacement of the internal filter, most designs normally experience torque converter failure  100,00-150,000 miles. 
Depending on the extent of the damage, a transmission overhaul is highly recommended.  Simply replacing the torque converter may not completely fix the problem.  Another problem you are likely to encounter is 2nd gear clutch pack failure, especially if the filter has become contaminated with debris from the unraveling of the TCC lining.
All-Trans Transmissions Inc. addresses the immediate repairs needed for your transmission assembly as well as any aftermarket updated components available to improve quality and durability.  Sonnax Industries offers updated o-ringed end plug kits #98892 that have proven to be a great fix for hydraulic leaks in the valve body assemblies of Honda and Acura 4-speed and 5-speed automatic transmission assemblies.
Is your transmission slipping???
Call (302) 366-0104 for a FREE OBDII Scan.

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