The GM 6T70 is a six-speed electronically controlled automatic transaxle designed for front-wheel-drive and all-wheel-drive vehicles with higher-output engines. It has been used in a variety of Buick, Chevrolet, GMC, Cadillac and other GM applications, including larger passenger cars, crossovers and SUVs. The 6T70 uses multiple clutch packs and electronically controlled hydraulic circuits rather than traditional shift bands to produce its six forward ratios. Smooth operation depends on accurate pressure regulation and precise clutch timing. If your 6T70-equipped vehicle is slipping, flaring between gears or shifting harshly in Bellevue, NE, Certified Transmission can diagnose the transmission and provide a rebuilt 6T70 when replacement is necessary.
Common 6T70 Transmission ProblemsValve-body wear is an important concern in the 6T70. Repeated movement of the pulse-width-modulated clutch-control valves can wear their bores and allow hydraulic pressure to escape from the circuits they regulate. Symptoms can include slips or flares, harsh shifts, delayed engagement, wrong-gear starts, torque-converter clutch slip or harsh TCC apply. Hydraulic pressure loss can also contribute to burned clutches and reduced converter or lubrication flow. Solenoid-performance codes and erratic line pressure may accompany these problems. Because early and later valve-body versions can appear very similar but are not necessarily interchangeable, correct transmission identification is critical during diagnosis and rebuilding.
Rebuilt 6T70 Transmissions from Certified TransmissionWhen hydraulic wear has progressed into clutch or other internal damage, replacing a single valve or solenoid may no longer provide a complete solution. Certified Transmission can provide a rebuilt 6T70 transmission in Bellevue backed by Certified Transmission's centralized rebuilding capabilities. The complete transmission can be disassembled so valve-body circuits, clutch packs, converter components, bushings and hard parts can be inspected for wear or damage. Customers in Bellevue, NE receive local diagnosis and installation while benefiting from the resources of a company specializing in transmission rebuilding. Contact Certified Transmission for rebuilt 6T70 transmission service throughout Sarpy County.