Description: 700R4 4L60E 4L65E SONNAX PIN-LESS ACCUMULATOR PISTON KIT "FITS ALL YEARS" HERE IS THE KIT YOU HAVE BEEN WAITING FOR!!!!!! SONNAX UPDATED PIN-LESS ACCUMULATOR PISTON KIT. NOTE: TWO (2) USED PER TRANSMISSION THIS PISTON WILL FIT THESE AUTOMATIC TRANSMISSIONS; GMC CHEVY BUICK CADILLAC PONTIAC OLDSMOBILE 700R4 (4L60) 1982-93 4L60E 1993-ON 4L65E 2001-ON THIS IS A LISTING FOR ONE PISTON KIT!!!!!!! ONE TRANSMISSION WILL TAKE TWO OF THESE KITS FOR ALL YEARS!!!! SONNAX 1-2 AND 3-4 UPDATED PIN-LESS ACCUMULATORS: Pinless Accumulator Pistons Part summary; In 4L60 & 4L60-E 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 three versions of a dual-seal, pinless accumulator piston kit. 4L60E / 4L65E Pinless accumulator piston. In 4L60-E units it is common for the plastic forward accumulator piston to wear or crack. This causes a fluid loss resulting is delayed engagement, slips, burned clutches and/or band. Repeated reciprocation of the accumulator piston causes the piston pin bore to wear. Fluid loss through the piston pin bore or cracks causes forward clutch to slip. The stock accumulator piston can develop a large pressure leak at the pin area over a period of 50 to 100 thousand miles THIS IS HOW THE PINLESS ACCUMULATORS WORK. COMPLAINT; Burned clutches and band. Poor shift quality. CAUSE: Wear at the piston pin bore due to repeated reciprocation. CORRECTION: The Sonnax patented pinless design with dual seals stabilizes the piston in the bore and provides improved sealing characterics. Use of this part eliminates the need for the pins. THIS UPDATE PACKAGE CAN BE INSTALLED WITH THE TRANSMISSION IN OR OUT OF THE VEHICLE. **Note to Buyer** Buyer feedback is a very important part of our business. If you are going to leave anything other than 5 Stars please contact us first to give us a chnce to resolve any issues you may have with our product. Customer satisfaction is our top priority.
Price: 28.33 USD
Location: Lakewood, Washington
End Time: 2024-10-27T17:05:03.000Z
Shipping Cost: 0 USD
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Item Specifics
Restocking Fee: 10%
Return shipping will be paid by: Buyer
Returns Accepted: Returns Accepted
Item must be returned within: 30 Days
Refund will be given as: Money Back
Country/Region of Manufacture: United States
Interchange Part Number: S74927K
Manufacturer Part Number: 77998-03K
Brand: SONNAX
Manufacturer Warranty: Yes