Product Description
Sonnax 77987-01K Pinless Forward Accumulator 4L60E - 4L65E - 4L70E 1993-on.
Sonnax Updated Pinless Accumulator Piston Kit.
This Piston Will Fit These Automatic Transmissions;
GMC Chevy Buick Cadillac Pontiac Oldsmobile
- 4L60E 1993-on
- 4L65E 2001-on
- 4L70E 2006-on
- Will Not Work Or Fit In 700R4 Or 4L60
Sonnax Forward Updated Pinless Accumulator:
Pinless Accumulator Pistons Part Summary;
This Is The Accumulator Piston In The Valve Body. This Piston Tends To Be Plastic From The Factory And Fails Due To Cracks And Wear.
4L60E Series Pinless Accumulator Piston. In 4L60E 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;
Delayed Engagements, Slipping In Forward Gears
Burned Clutches And/or Bands, Plastic Pistons Crack And Are Not Durable, Aluminum Pistons Wear At The Pin Bore
Cause:
Wear At The Piston Pin Bore Due To Repeated Reciprocation And/or Cracks In The Plastic Accumulator Piston.
Correction:
The Sonnax Patent Pending Pinless Design With Dual Seals Stabilizes The Piston In The Bore And Provides Better Sealing Characteristics. 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.
This Listing Is For The Sonnax 77987-01K Pinless Accumulator Piston Kit Only And Will Not Include The Valve Body, Springs, Cover Or Solenoids!!!!
Please Make Sure Of Your Year Before Ordering, Any Questions Please Call 1-888-8CT-POWR (1-888-828-7697)
