GMB 470-3777 Engine Timing Belt Tensioner Hydraulic Assembly

Engine Timing Belt Tensioner for Toyota Applications

GMB 470-3777 is an engine timing belt tensioner hydraulic assembly built to meet or exceed OEM specifications. It is a direct-fit replacement for select Toyota trucks and SUVs, with fitment for Tacoma, Tundra, 4Runner, and T100 models across multiple model years.

Use this timing belt tensioner hydraulic assembly when servicing the valve train on a Toyota Tacoma, Toyota Tundra, Toyota 4Runner, or Toyota T100 and you need consistent belt tension control from a replacement part that matches OE requirements.

Key Features

• Engine timing belt tensioner hydraulic assembly for valve train service
• Built to meet or exceed OEM specifications
• Metal pulley construction for durability
• 1-groove pulley design
• Serpentine and V-belt pulley/belt type
• GMB part number 470-3777

Fitment Details

• Fits 1995-2004 Toyota Tacoma, N/A
• Fits 2000-2004 Toyota Tundra, N/A
• Fits 1996-2002 Toyota 4Runner, N/A
• Fits 1995-1998 Toyota T100, N/A

This part cross-references Dayco 85046 and Gates T43210 for the same application.

What This Part Helps Address

• Timing belt tension loss from a worn hydraulic assembly
• Belt noise caused by inconsistent tension control
• Premature timing belt wear from a failing tensioner
• Engine service issues during timing belt replacement
• Fitment concerns when replacing an OE-style Toyota tensioner

Installation Notes and Tips

Replace the timing belt tensioner during timing belt service to help maintain proper belt tension. Verify engine application by year, make, and model before installation, and inspect related timing components for wear while the system is apart. Confirm pulley alignment and belt routing during reassembly.

Quality Assurance

GMB manufactures this hydraulic tensioner assembly to meet or exceed OEM specifications, supporting OE-level fit and function for Toyota Tacoma, Toyota Tundra, Toyota 4Runner, and Toyota T100 applications.