Sonnax 74927-AP Forward Accumulator Piston Aluminum fits 4L60E 4L65E 4L70-E

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$13.95
Brand
Sonnax
Other Part Number
A74741G
Type
Piston
Interchange Part Number
8686017, 24200126
OE/OEM Part Number
8686017, 24200126
Items Included
Accumulator Piston
Manufacturer Part Number
74927-AP
Material
Aluminum
Country/Region of Manufacture
United States
Universal Fitment
Yes
Vintage Part
No
Performance Part
Yes
condition
New

4L60-E, 4L65-E, 4L70-E Transmission

Forward Accumulator Piston
Part No. 74927-AP

OE Part No. 8686017 or 24200126

In GM 4L60-E, 4L65-E and 4L70-E units, it is common for the plastic Forward accumulator piston to wear or crack and older aluminum piston bores to wear from repeated reciprocation. This causes a loss of fluid, resulting in delayed engagement, slips, burnt clutches and/or bands. Sonnax aluminum Forward accumulator piston 74927-AP eliminates the cracking problem and restores hydraulic integrity at the pin bore. The drop-in Zip Valve™ part installs quickly and easily.

Symptoms:

  • Cracked pistons
  • Burnt clutches
  • Burnt bands
  • Forward slip
  • Delayed engagement
  • 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:

Sonnax drop-in, aluminum forward accumulator piston is a direct replacement for the OE plastic piston and restores sealing integrity at the pin bore.