PPE 8L90 Transmission Thermal Bypass Valve 15-18 Silverado Sierra 1500

PPE – Pacific Performance Engineering 125071000
Key Features:

• Product Type: Transmission Fluid Thermal Bypass Valve
• Transmission: GM 8L90 8-Speed Automatic
• Transmission Line Size: 3/8 in
• OEM Reference: GM 13561467
• Fitment: 2015–2018 Chevrolet Silverado 1500 / GMC Sierra 1500 equipped with 8L90 transmission and 3/8" fluid lines
• Installation Type: Direct-fit replacement. 

Construction

• Billet aluminum valve body
• Precision-machined direct-fit design
• Removable service plug
• Integrated Neodymium magnet
• Service-plug O-ring seal
• Designed to connect directly to the factory 8L90 transmission fluid lines. 

Features

• Eliminates the restrictive mechanical factory thermal bypass valve
• Maximizes transmission-fluid flow to and from the cooler
• Helps increase available transmission cooling capacity
• Direct fit with the OEM 8L90 transmission and fluid lines
• Magnetic service plug captures ferrous metallic debris
• Removable plug allows collected particles to be cleaned from the system
• No modification to the transmission cooler system is stated as necessary for the intended application. 

Dimensions

PPE does not publish exact physical product dimensions or product weight on its current product page.

A distributor lists package dimensions at approximately:

• Length: 5 in
• Width: 4 in
• Height: 2 in.

For marketplace shipping fields, I recommend physically weighing and measuring the packaged item rather than treating these distributor dimensions as official PPE specifications.

Performance

The PPE valve is designed to provide full-time, less-restricted transmission-fluid circulation through the cooler by removing the restrictive mechanical function of the factory bypass valve. PPE states that a factory valve stuck closed can prevent transmission fluid from reaching the cooler and contribute to overheating. 

This can be particularly relevant under higher thermal loads such as towing and stop-and-go operation. PPE does not specify a guaranteed transmission-temperature reduction, so avoid advertising a specific number of degrees cooler based on customer reviews.

Applications

Designed specifically for:

• 2015–2018 Chevrolet Silverado 1500
• 2015–2018 GMC Sierra 1500
• Must have GM 8L90 8-speed automatic transmission
• Must use 3/8-inch transmission fluid lines. 

Fitment should be confirmed by transmission model and line size, not vehicle year alone.

Included

• 1 × PPE Transmission Fluid Thermal Bypass Valve
• Integrated magnetic service plug
• O-ring seal on service plug