4T80E 2003-2004 Cadillac DeVille, Seville & Pontiac Bonneville 4.6L FWD – Remanufactured 4-Speed Automatic Trans

Description

Touring sedan road performance centers on this Pontiac Bonneville 2004 Remanufactured Transmission tailored for high-output Northstar V8 transverse chassis installations. Operating via a 4-Speed FWD arrangement, this transaxle handles 275 continuous horsepower, 300 lb-ft input torque, a 6000 engine RPM limit, and 210 PSI line pressure. High-grade friction materials deliver crisp gear engagement across varying road gradients.

Die-cast A380 aluminum forms the outer transaxle shell for torsional rigidity. Carburized 8620 steel planetary gearsets and hardened sun gears handle torque transfer with quiet efficiency. The valve body features hard-anodized sleeves and an updated pressure regulator valve to eliminate shift shudder. Fluid ports take 3/8-inch fittings. Dry weight is 295 lbs, taking 15.0 quarts of fluid with the remanufactured torque converter.

Key Features of Pontiac Bonneville

Wholesale vehicle technicians buy Pontiac Bonneville 2004 remanufactured transmission modules to ensure long-term driveline reliability on executive sedans. Restored hydraulic circuits protect internal clutch packs from wear under prolonged highway cruising.

• 4-Speed front wheel drive configuration engineered for long-distance high-speed cruising
• 8620 carburized planetary steel gears withstand high torque loads without fatigue
• Hard-anodized valve body bore sleeves eliminate hydraulic circuit pressure drops
• Segmented friction clutch plates resist heat build-up in stop-and-go road traffic
• 2004 Bonneville replacement valve body provides balanced fluid line pressures
• Bonneville 2004 torque converter package eliminates clutch shudder during lockup phases
• Heavy-duty twin drive chains transfer rotational power without stretching
• Precision-molded differential seals protect transaxle oil levels from road seepage

Hydraulic Pressures Ratio Mechanics

Hydraulic line pressure operates between 190 and 225 PSI under heavy throttle to lock clutch packs firmly. Transmission fluid temperatures stay within 165°F to 190°F via the external radiator cooler. Continuous input torque capacity reaches 300 lb-ft at 4000 RPM. Gear reduction steps feature 2.96:1 in 1st gear, 1.63:1 in 2nd gear, 1.00:1 in 3rd gear, plus 0.68:1 in 4th gear overdrive. Pressurized lube channels protect all rotating planet pins.

Driveline Mounting Spline Layout

The integrated differential engages factory 34-spline passenger-side axles and 32-spline driver-side inner tripods. Engine bell housing dowel pins hold alignment runout below 0.0017 inches to prevent front seal wear. Chassis mounting bosses fit stock subframe pads without modification. Differential carrier bearings maintain correct preload to stop driveline whine across all highway speeds.

Dyno Quality Evaluation Limits

Computer-controlled dynamometer testing validates electronic solenoid response and hydraulic pressure stability under high operating fluid temperatures. Cooler passages undergo high-pressure cleaning before crating. This transaxle is not engineered for quarter-mile drag racing, vehicle towing exceeding chassis limits, or use without a flushed cooler circuit.

• Inspect fluid level using the dipstick every 30 operating days
• Change fluid and internal suction filter every 30,000 miles
• Inspect transmission cooling lines for damage every 12 months

Warranty Statement Final Package

This unit carries a 3-Year unlimited mileage warranty covering commercial and personal vehicle applications. Shipments contain the complete remanufactured transmission, spin-on filter, balanced torque converter, and technical service documentation. Sturdy wooden crates shield the transmission housing ears from impact during intermodal freight transport.