NHTSA Complaint #10376247 — 2006 CHEVROLET IMPALA

2006-2009 CHEVROLET IMPALA SS, 2006-2007 CHEVROLET MONTE CARLO SS, 2005-2008 PONTIAC GRAND PRIX GXP AND 2007-2008 BUICK LACROSS SUPER WITH THE LS4 5.3L V8 ENGINE AND THE 4T65E-HD TRANSMISSION MN7. THE LS4 V8 ENGINE IS RATED BY GM AT 323 LB-FT OF TORQUE. ALLEGEDLY, THE DOCUMENTS FROM GM FOR THE TRANSAXLE MATED TO THIS MOTOR IS ONLY RATED FOR 280 LB-FT OF ENGINE TORQUE; 43 LB-FT OF TORQUE LOWER THAN THE OUTPUT OF THE ENGINE. THIS COULD POSSIBLY LEAVE A VEHICLE EQUIPPED WITH THIS MOTOR AND TRANSAXLE COMBINATION WITH A HIGH FAILURE RATE AND A POSSIBLE SAFETY HAZARD WHILE IN TRAFFIC. THE REFERENCED SPECIFICATIONS CAN BE FOUND AT: HTTP://ARCHIVES.MEDIA.GM.COM/US/POWERTRAIN/EN/PRODUCT_SERVICES/2006/SPEC%20SHEETS/COMMUNICATIONS%20NAO%20ONLY%20SPEC%20SHEETS/TRANSMISSIONS/2006%20AUTOMATICS/2006%204T65-E%20(M15,MD7,MN7,M76).PDF AND HTTP://ARCHIVES.MEDIA.GM.COM/US/POWERTRAIN/EN/PRODUCT_SERVICES/2006/SPEC%20SHEETS/GEN%20IV/2006%20GEN%20IV%20LS4%20CAR.PDF VIA HTTP://ARCHIVES.MEDIA.GM.COM/US/POWERTRAIN/EN/PRODUCT_SERVICES/2006/CAR%20ENG%20TRANS.HTML. *TR