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Sonnax GM 700R4 Transmission Pinless 1-2 & 3-4 Accumulator Piston TH2004R 4L60E 4L65E 4L70E
OPT Product Code: SNX-77998-03K$25.00
Product Details
In 4L60, 700-R4 & 4L60-E 4L65-E 4L70-E 200-4R units it is common to have poor shift quality, burned bands or clutches due to accumulator piston wear. Repeated reciprocation of the accumulator piston causes wear at the piston pin bore interface. After this wear reaches a critical point, fluid loss through the piston pin bore cannot be compensated due to lack of pump volume. In addition, the piston can get cocked and gall the accumulator bore due to the pin bore wear or the spring bottoming out. Sonnax now offers 77998-03K a dual-seal, pinless accumulator piston kit, to prevent the above conditions. (TWO NEEDED TO SERVICE BOTH ACCUMULATORS) For the 200-4R, this accumulator only fits the 3-4 bore.
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