Turbocharger GTA3782BD for International 4300 4400 (2002-2006) 7.6L

Direct-Replacement Turbocharger GTA3782BD for 2002-2006 International 4300,4400 (DuraStar)

What it Does: The GTA3782BD turbocharger replaces fatigued factory turbine units on 2002-2006 International 4300 and 4400 trucks to eliminate boost loss, restore exhaust gas drive pressure, and recover heavy-payload pulling power.

The Stock International 4300,4400 Turbocharger Failure Modes

Commercial duty cycles and sustained exhaust gas temperatures (EGTs) accelerate wear on the factory center housing rotating assembly (CHRA). Thermal coking degrades the journal bearing lubrication film, inducing severe shaft play, dynamic oil seal breakdown, and compressor wheel rubbing against the housing. Additionally, the factory wastegate actuator spring softens over time from continuous heat soak, cracking open prematurely and causing erratic manifold pressure, low boost derates, excessive black smoke, and sluggish throttle response under load.

The Engineering Solution

This replacement turbocharger is engineered to original GTA3782BD specifications, incorporating a heavy-wall ductile iron turbine housing and high-efficiency cast alloy compressor wheel to resist thermal distortion under heavy load. The oil-cooled center housing features precision-machined journal and 360-degree thrust bearings to withstand extreme thrust loads and avoid coking. Built with a calibrated pneumatic wastegate actuator rated for engines producing up to 300 hp, it bolts straight to the stock manifold and exhaust downpipe without line modification.

What's Included

• 1 Turbocharger with Wastegate Actuator
• 1 Turbine Inlet Flange Gasket
• 2 Oil Line Gaskets

Technical Specifications

Compatibility

• 2002-2006 International 4300 with Navistar DT466 / DT466E 7.6L
• 2002-2006 International 4400 with Navistar DT466 / DT466E 7.6L
• Navistar I530E diesel applications matching listed cross-reference numbers

Frequently Asked Questions & Fitment Warnings

Does this fit the DuraStar 4300,4400?

Yes, this is a direct fit for the 2002-2006 International 4300,4400 equipped with the DT466 / DT466E engine. Does not fit non-wastegated GTA3776B / GTA3782B turbo systems or 2007+ MaxxForce DT engines with electronic VGT systems.

Is oil pre-priming required before the first engine startup?

Yes, you must pour clean engine oil into the center housing oil inlet cavity and rotate the compressor wheel by hand prior to startup to prevent dry bearing seizure.

The International Commercial Standard

Commercial transport demands sustained boost integrity and thermal endurance under severe gross combined weight ratings; this turbocharger restores the torque delivery, lower exhaust gas temperatures, and continuous hauling reliability demanded by fleet operations.