4L80E Street Spec Performance Transmission

Description

Tailored for high-performance street machines, this GM 4L80E Street Spec Remanufactured Transmission provides superior torque holding across aggressive road applications. Built as a 4-Speed 2WD package, it handles 650 continuous horsepower and 600 lb-ft torque at engine speeds up to 6000 RPM. Calibrated hydraulic lines sustain 215 PSI mainline pressure to eliminate clutch friction glaze under hard throttle acceleration.

The reinforced die-cast aluminum transmission case protects carburized 8620 alloy steel planetary gears from structural housing flex. Heavy-duty carbon-metallic clutch frictions replace factory organic linings to handle high continuous heat loads. The performance valve body features laser-honed accumulator bores and upgraded pressure boost valves. The unit weighs 235 lbs dry, holding 12 quarts of transmission fluid through -6 AN cooler line ports.

Key Features of GM 4L80E

Street machine enthusiasts choose to buy GM 4L80E Street Spec remanufactured transmission inventory for fast, crisp shifts and rock-solid reliability. This driveline maintains exceptional hydraulic pressure during aggressive street and track driving.

• High-energy intermediate friction discs prevent clutch slippage across spirited 1st to 2nd gear shifts
• Street Spec 4-Speed performance valve body channels firm pressure rise without shift hesitation
• Heavy-duty billet steel forward clutch hub prevents catastrophic spline shearing under hard street launches
• Carbon-metallic single-disc torque converter clutch stops slippage during highway lockup cruise
• Reinforced 34-element intermediate sprag assembly prevents roller rollover during wide-open throttle runs
• Oversized hydraulic pressure regulator spool maintains constant oil feed across all drive ranges
• Computer-balanced internal rotating gear train eliminates driveline vibration at high engine RPM

Fluid Dynamics Line Pressure Limits

Hydraulic line pressure operates between 200 and 235 PSI during high-load gear changes. Operating transmission fluid temperatures stabilize between 165°F and 195°F with adequate auxiliary cooler airflow. Factory-spaced gear steps feature 2.48:1 in 1st gear, 1.48:1 in 2nd gear, 1.00:1 in 3rd gear, and 0.75:1 in 4th gear overdrive. The system easily handles 600 lb-ft input torque at 4000 RPM.

Chassis Interface Output Yoke Fitment

Power transfers through a high-strength 32-spline output shaft designed for heavy-duty street slip yokes. Bell housing pilot diameter measures 5.125 inches for direct flexplate centering. Total distance from the engine face to the crossmember pad is 24.5 inches, while output bushing dial runout measures less than 0.0015 inches.

Dyno Calibration Periodic Maintenance Intervals

Automated dynamometers subject every transmission to simulated street loads, measuring pressure curves, shift solenoid speed, and converter clutch lockup under elevated heat. Cooler flow ports are fully verified. This transmission is not built for pro-mod drag racing classes, tractor pulls, or applications using dirty coolers.

• Check transmission dipstick fluid level on level ground every 14 operating days
• Change fluid and install a new oil filter every 25,000 miles
• Inspect transmission cooling lines and fittings every 12 months

Standard Crate Inventory Warranty Terms

Every street transmission includes a 3-Year unlimited mileage warranty protecting enthusiasts against mechanical failure. The durable wooden shipping crate contains the complete remanufactured transmission, street performance torque converter, inline fluid cooler filter, complete installation instructions, and fluid specification charts.