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Drivetrain› Automatic Transmissions and Components

Sonnax

3-4 Accumulator Sleeve Kit

Name: 3-4 Accumulator Sleeve Kit
Brand: Sonnax
SKU: 77998-01K

$56.47 $28.99 Save $27.48

SKU: 77998-01K

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$100 Minimum Order

Non-Returnable Item

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Moderate — 2–4 hours

Overview

The Sonnax 3-4 accumulator sleeve kit is designed to counteract bore wear in GM 4L60, 4L60-E, 4L65-E, and 4L70-E transmissions. This kit features upgraded materials for increased durability. It includes an aluminum sleeve, a replacement piston with an O-ring, and a new accumulator pin.

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The Sonnax 77998-01K 3-4 accumulator sleeve kit is engineered to address bore wear issues commonly found in GM 4L60, 4L60-E, 4L65-E, and 4L70-E transmissions. This kit utilizes upgraded materials, including an aluminum sleeve, to provide greater durability and longevity compared to stock components. The kit comes complete with a replacement piston featuring an O-ring and a new accumulator pin, ensuring all necessary parts for replacement are included. Installation of this kit requires no machining of the transmission case, simplifying the repair process. The direct-fit design ensures compatibility with OE components. Sonnax is known for its commitment to quality and durability, providing reliable solutions for automatic transmission repair and enhancement.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

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Specifications

Brand	Sonnax
Part Number	77998-01K
Category	Drivetrain

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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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