Sale

Drivetrain› Automatic Transmissions and Components

Sonnax

3-4 Accumulator Sleeve Kit

$56.47 $28.99 Save $27.48

SKU: 77998-01K

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

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.
Show original supplier description
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.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandSonnax
Part Number77998-01K
CategoryDrivetrain
5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
(760) 282-4645 hello@motormia.co

Buy with Confidence

Returns & Fitment

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.

View Full Return Policy

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.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

View Full Shipping Policy