The 1999 Acura TL features a sophisticated automatic transmission system that requires proper maintenance and repair procedures. This manual covers the 4-speed automatic transmission used in the 1999 Acura TL, including transmission identification, fluid specifications, removal and installation procedures, troubleshooting, and common repair issues. Below are key sections for transmission service, repair procedures, specifications, and maintenance guidelines.
The 1999 Acura TL uses the B7XA automatic transmission. Key identification features: 4-speed automatic with lock-up torque converter, electronic control, and specific mounting points.
| Component | Identification |
|---|---|
| Transmission Model | B7XA 4-speed automatic |
| Transmission Code | Located on transmission case near bellhousing |
| Fluid Type | Honda/Acura ATF-Z1 or equivalent |
| Torque Converter | Lock-up type with specific stall speed |
| Control System | Electronic with TCM |
| Mounting Points | Three main transmission mounts |
| Drive Shaft | Front-wheel drive configuration |
| Cooler Lines | Integrated with radiator cooler |
| Shift Solenoids | A, B, and C shift solenoids |
| Speed Sensors | Input and output speed sensors |
Proper fluid selection and maintenance are critical for transmission longevity.
WARNING! Use only specified transmission fluid. Incorrect fluid can cause transmission damage.
Complete transmission removal requires proper equipment and safety precautions.
CAUTION! Transmission is heavy; use transmission jack and proper lifting equipment.
Proper installation ensures correct operation and prevents damage.
Important: Torque all bolts to factory specifications.
Typical issues with 1999 Acura TL transmission and their causes.
Shift Solenoids: A, B, and C solenoids can fail causing harsh shifts or no shift. Torque Converter: Lock-up clutch failure causes shudder or slippage. Valve Body: Wear or contamination affects shift quality. Input/Output Sensors: Failure causes speedometer issues or shifting problems. Transmission Mounts: Worn mounts cause vibration and shifting concerns.
Regular fluid maintenance prevents premature transmission failure.
Tip: Check fluid when transmission is at normal operating temperature.
The torque converter requires specific service procedures.
WARNING! Never reuse a damaged torque converter. Ensure proper alignment during installation.
The TCM controls shift timing and torque converter lock-up.
Location: Under dashboard near center console. Functions: Monitors vehicle speed, throttle position, engine load. Diagnostics: Can store trouble codes for transmission issues. Reprogramming: May require dealer equipment for updates. Replacement: Must be programmed to vehicle VIN.
Always follow safety procedures when working on transmission.
CAUTION! Use jack stands, wear safety glasses, avoid hot components, and disconnect battery before starting work.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Transmission slips | Low fluid, worn clutches | Check fluid level, inspect clutch packs |
| Harsh shifting | Faulty solenoids, pressure issues | Test shift solenoids, check line pressure |
| No forward movement | Forward clutch failure | Inspect forward clutch assembly |
| No reverse | Reverse clutch failure | Check reverse clutch and related components |
| Delayed engagement | Low fluid, valve body issues | Check fluid level, inspect valve body |
| Overheating | Clogged cooler, heavy use | Flush cooler lines, check fluid condition |
| Fluid leaks | Seals, gaskets, cooler lines | Inspect and replace leaking components |
| Check engine light | TCM codes, sensor issues | Scan for codes, test sensors |
Diagnostic: Use OBD-II scanner to read transmission codes.
Service: Acura dealership or qualified transmission specialist recommended.