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Your cart is empty. 4L60-E, 4L65-E and 4L70-E Transmissions units it is common for the plastic forward accumulator piston to wear or crack. causes a loss of fluid, resulting in delayed engagement.
77987-01K:
Piston
D-Ring
PTFE Seal
Steel balls (2)
77998-03K (2PC):
D-Ring
Pinless Accumulator Piston Aluminum
Seal PTFE
Steel Ball .312" dia.
Steel Ball .236" dia.
John Lynn
2025-08-02 17:26:13
Will continue to buy from this seller in the future.
Rob Morton
2025-07-02 18:03:50
No holes in the pistons for the pins. Check balls are way too big. I'll use the original stuff until I find better. Chinese garbage
José Luis crespo López
2025-06-22 11:27:54
Muy bueno
Ryan Miligi
2025-04-08 18:14:08
Don’t buy the balls are too big and too small to fit the holes they need to block off. Buy the name brand sonnax kit
jack smith
2025-01-13 19:11:40
Ball bearings to seal off pins are wrong size and no instructions
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