Consequential or incidental damages (downtime, towing, loss of Notice
Professional installation is required. Failure to follow manufacturer and industry-standard installation procedures will void this warranty is limited to the product only and does not cover related components or vehicle damage. Maximum liability shall not exceed the original purchase price.30-day return policy for unused, uninstalled items. Any product you return must be in the same condition you received it and in the original packaging.
If you’re having an issue with a used or remanufactured item and it’s been installed, we require the buyer to contact us immediately so we can provide trouble shooting information. Worst case scenario if that fails, exchange only.
Certain item such as fluids, used items, tools, and one time use items are not eligible for return. As a buyer, it is your responsibility to verify that this product is compatible with your you ordered the wrong item for your application YOU are responsible for the return shipping.
20% Restocking Fee May Apply
A NAME YOU CAN TRUST
As an industry veteran in the transmission parts supply business, you can buy with confidence. Our goal is to provide high quality parts, an experienced sales force, and the highest levels of product availability possible.
Sonnax 154740-06K Signal Accumulator Piston Kit GM 8L45 8L90 No Ream
ITEM HIGHLIGHTS
• Fits GM 8L45 and 8L90 automatic transmissions
• Drop-in repair kit—no reaming required
• Reconditions worn signal accumulator piston bores
• Helps restore VFS signal pressure and hydraulic control
• Hardcoat anodized aluminum pistons resist premature wear
• Wear-resistant sleeves help prevent future bore wear
• O-ringed end plugs provide positive sealing in worn bores
• Includes seven complete piston repair assemblies
PRODUCT DESCRIPTION
The Sonnax 154740-06K Signal Accumulator Piston Kit is a drop-in hydraulic repair solution for GM 8L45 and 8L90 automatic transmissions.
Wear in the signal accumulator piston bores of the control solenoid valve body can allow valuable VFS signal pressure to escape. This pressure loss may contribute to poor shift quality, soft shifts, low line pressure, converter clutch apply concerns, hydraulic-related converter codes and burnt clutches.
This kit reconditions the worn bores without requiring reaming. The included hardcoat anodized aluminum pistons, wear-resistant sleeves and positive-sealing O-ringed end plugs help restore hydraulic integrity while reducing the likelihood of future wear.
Mating springs are included to restore the original accumulator dampening action.
KIT CONTENTS
• Seven (7) wear-resistant sleeves
• Seven (7) hardcoat anodized aluminum pistons
• Seven (7) mating springs
• Nine (9) O-rings—includes two extra O-rings
• Seven (7) end plugs
FEATURES AND BENEFITS
• No special reaming operation required
• Annular piston grooves help reduce the rate of wear
• Sleeves provide a durable replacement operating surface
• O-ringed plugs help prevent leakage in already-worn bores
• Restores VFS signal pressure circuit integrity
• Helps restore proper shift control and line-pressure regulation
• Helps restore converter clutch control-valve pressure
• Drop-in Sonnax Zip Valve components install quickly and easily
MAY HELP ADDRESS
• Poor shift quality
• Soft shifts
• Low line pressure
• No converter apply
• Hydraulic-related converter codes
• Burnt clutches
FITMENT
GM 8L45 Automatic Transmission
GM 8L90 Automatic Transmission
PART INFORMATION
Brand: Sonnax
Manufacturer Part Number: 154740-06K
Part Type: Signal Accumulator Piston Kit
Installation Type: Drop-In; No Reaming Required
Quantity: One Complete Kit
IMPORTANT FITMENT INFORMATION
Transmission identification should be confirmed before ordering. Vehicle year, make and model alone may not guarantee compatibility because multiple transmission configurations can be used in the same vehicle.
Professional diagnosis and installation are recommended. Sonnax indicates this repair may be needed when vacuum testing at the designated ports fails to hold the recommended minimum vacuum or when bore wear is visually detected.
Sonnax 154740-06K Signal Accumulator Piston Kit GM 8L45 8L90 No Ream
ITEM HIGHLIGHTS
• Fits GM 8L45 and 8L90 automatic transmissions
• Drop-in repair kit—no reaming required
• Reconditions worn signal accumulator piston bores
• Helps restore VFS signal pressure and hydraulic control
• Hardcoat anodized aluminum pistons resist premature wear
• Wear-resistant sleeves help prevent future bore wear
• O-ringed end plugs provide positive sealing in worn bores
• Includes seven complete piston repair assemblies
PRODUCT DESCRIPTION
The Sonnax 154740-06K Signal Accumulator Piston Kit is a drop-in hydraulic repair solution for GM 8L45 and 8L90 automatic transmissions.
Wear in the signal accumulator piston bores of the control solenoid valve body can allow valuable VFS signal pressure to escape. This pressure loss may contribute to poor shift quality, soft shifts, low line pressure, converter clutch apply concerns, hydraulic-related converter codes and burnt clutches.
This kit reconditions the worn bores without requiring reaming. The included hardcoat anodized aluminum pistons, wear-resistant sleeves and positive-sealing O-ringed end plugs help restore hydraulic integrity while reducing the likelihood of future wear.
Mating springs are included to restore the original accumulator dampening action.
KIT CONTENTS
• Seven (7) wear-resistant sleeves
• Seven (7) hardcoat anodized aluminum pistons
• Seven (7) mating springs
• Nine (9) O-rings—includes two extra O-rings
• Seven (7) end plugs
FEATURES AND BENEFITS
• No special reaming operation required
• Annular piston grooves help reduce the rate of wear
• Sleeves provide a durable replacement operating surface
• O-ringed plugs help prevent leakage in already-worn bores
• Restores VFS signal pressure circuit integrity
• Helps restore proper shift control and line-pressure regulation
• Helps restore converter clutch control-valve pressure
• Drop-in Sonnax Zip Valve components install quickly and easily
MAY HELP ADDRESS
• Poor shift quality
• Soft shifts
• Low line pressure
• No converter apply
• Hydraulic-related converter codes
• Burnt clutches
FITMENT
GM 8L45 Automatic Transmission
GM 8L90 Automatic Transmission
PART INFORMATION
Brand: Sonnax
Manufacturer Part Number: 154740-06K
Part Type: Signal Accumulator Piston Kit
Installation Type: Drop-In; No Reaming Required
Quantity: One Complete Kit
IMPORTANT FITMENT INFORMATION
Transmission identification should be confirmed before ordering. Vehicle year, make and model alone may not guarantee compatibility because multiple transmission configurations can be used in the same vehicle.
Professional diagnosis and installation are recommended. Sonnax indicates this repair may be needed when vacuum testing at the designated ports fails to hold the recommended minimum vacuum or when bore wear is visually detected.