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Fortpro Slave Valve for Fuller Transmission - Replaces A-4688, 422159C92

Fortpro Slave Valve for Fuller Transmission - Replaces A-4688, 422159C92

SKU: F112803

Availability: In Stock

Stock Level: Only 32 left in stock - Order Soon!

Shipping: Calculated at Checkout

Regular price $55.38 USD
Regular price Sale price $55.38 USD
Sale Sold out
Shipping calculated at checkout.

About this Item

  • Regulates hydraulic pressure to activate clutches and brakes, allowing smooth gear changes.
  • Built to withstand the demands of continuous use in heavy truck applications.
  • Optimizes transmission performance by ensuring precise gear changes.
  • Reduces wear on transmission components, prolonging their useful life.
  • Designed to match the specifications and functionality of the original OEM components, ensuring proper fit and performance in your transmission system.


Optimize the performance of your Fuller transmission with the Fortpro Slave Valve. Engineered for impeccable precision and exceptional durability, this slave valve ensures smooth and efficient gear changes every time. Compatible with Fuller transmissions and replacing OEM numbers A-4688 and 422159C92, this valve is the perfect solution to keep your transmission running smoothly.


  • Brand: Fortpro
  • Vehicle Type: Semi-Trucks / Heavy Trucks
  • Product Department: Transmission
  • Product category : Valves
  • Part Type: Slave Valve / Transmission Valve
  • OEM Reference #: A-4688, A4688
  • Thread Type: NPT
  • Supply Ports: 2
  • Supply Ports Thread: 1/8 in. - 27 NPT
  • Delivery Ports: 2
  • Delivery Ports Thread: 1/8 in. - 27 NPT
  • Control Port: 1
  • Control Port Thread: 1/8 in. - 27 NPT
  • Exhaust Port: 1
  • Exhaust Port Thread: 1/8 in. - 27 NPT
  • Operating pressure Max: 10 bar
  • Operating Medium: Air
  • Operating Temperature Range: -40C to / a +80C
  • Mounting Screws: 4 - M6
  • Applications: Fuller Transmissions


  • Automann: 174.A4688
  • Fuller: A-4688, A4688

Shipping Policy

In order to send your purchase, our company may use different freight companies like USPS, UPS and some 3erd Carrier Services for Oversize orders, this will not affect the final price of your order. We will send you all the information in due time. 

For Free Shipping and Freight/Oversize Shipments they are some special term you may check at our Terms & Conditions page.


Return Policy

If for any reason you need to return a purchased item, we have a 30-day return policy, which means you have 30 days after receiving your item to request a return.

To be eligible for a return, your item must met the conditions stablished in our Terms & Conditions.

To start a return, you can contact us at


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