1. Introduction
This manual provides essential information for the proper installation and understanding of the Sonnax 34006-SP "No Walk Out" Case Bushing. This component is designed for use in 4L80E, 4L85E, and 400 series automatic transmissions, primarily found in GM vehicles. Its purpose is to enhance transmission durability by preventing common bushing failures.
Proper installation is critical for the performance and longevity of this part. It is recommended that installation be performed by a qualified transmission technician.
2. Product Overview
The Sonnax 34006-SP is a specialized case bushing engineered to address the issue of bushing "walk-out" in compatible transmissions. Key features include:
- Enhanced Design: Features a unique design to prevent the bushing from migrating out of its bore, a common failure point in high-stress applications.
- Application: Specifically designed for 4L80E, 4L85E, and 400 automatic transmissions.
- Material: Constructed from durable materials for extended service life.
- Fitment: Compatible with various GM vehicle models utilizing the specified transmissions. Always verify fitment for your specific year, make, model, and engine size before installation.
Figure 1: Front view of the Sonnax 34006-SP Case Bushing. This image displays the bronze-colored bushing with its distinct flange designed to prevent movement within the transmission case.
3. Specifications
| Attribute | Detail |
|---|---|
| Brand | Sonnax |
| Model Number | 34006-SP |
| OEM Part Number | 34006-SP |
| Vehicle Service Type | Car, Truck |
| Compatible Transmissions | 4L80E, 4L85E, 400 |
| Installation Type | Professional Press-Fit Recommended |
| Item Weight | 1.44 ounces |
| Package Dimensions | 4.17 x 3.98 x 0.59 inches |
4. Installation Guidelines
The Sonnax 34006-SP Case Bushing is a precision component requiring careful installation. Incorrect installation can lead to transmission damage or premature failure. Professional installation by a certified transmission technician is strongly recommended.
4.1 Pre-Installation Checks
- Verify Fitment: Before beginning any work, confirm that the 34006-SP bushing is the correct part for your specific transmission model (4L80E, 4L85E, or 400) and vehicle application. Consult your vehicle's service manual or a Sonnax representative if unsure.
- Inspect Components: Ensure the transmission case bore is clean, free of debris, and undamaged. Inspect the new bushing for any manufacturing defects.
- Required Tools: Installation typically requires specialized bushing drivers and a press. Do not attempt to hammer the bushing into place, as this can cause damage.
4.2 Installation Procedure (General)
- Transmission Disassembly: The transmission must be disassembled to access the case bushing location. Follow the manufacturer's service manual for proper disassembly procedures.
- Remove Old Bushing: Carefully remove the existing bushing from the transmission case bore. Use appropriate tools to avoid damaging the case.
- Clean Bore: Thoroughly clean the bushing bore in the transmission case. Any contaminants can affect the new bushing's seating and performance.
- Install New Bushing: Using a suitable bushing driver and a hydraulic press, carefully press the Sonnax 34006-SP bushing into the clean bore. Ensure it is seated squarely and fully. The "No Walk Out" design incorporates a flange that should be properly seated against the case.
- Verify Seating: After installation, visually inspect the bushing to ensure it is correctly seated and flush (or as specified by Sonnax guidelines) within the bore.
- Reassembly: Reassemble the transmission according to the manufacturer's service manual, paying close attention to torque specifications and proper component alignment.
Figure 2: Angled view of the Sonnax 34006-SP Case Bushing, highlighting the precision-machined surfaces and the flange designed for secure seating.
5. Maintenance
Once properly installed, the Sonnax 34006-SP Case Bushing is designed to be a durable, maintenance-free component within the transmission. Regular maintenance of the transmission itself, including fluid changes and filter replacements according to the vehicle manufacturer's schedule, will contribute to the overall longevity of all internal components, including this bushing.
No specific maintenance is required for the bushing itself beyond ensuring proper transmission fluid levels and condition.
6. Troubleshooting
The Sonnax 34006-SP bushing is designed to prevent "walk-out," a condition where the bushing moves from its intended position, leading to fluid leaks, pressure loss, and potential damage to other transmission components. If you experience any of the following symptoms after transmission service, it may indicate an issue with the bushing or other internal components:
- Transmission Fluid Leaks: Leaks around the case area where the bushing is located.
- Loss of Pressure: Symptoms such as delayed engagement, slipping, or harsh shifts, which can be indicative of internal pressure loss.
- Unusual Noises: Grinding or whining sounds from the transmission.
If any of these symptoms occur, it is crucial to have the transmission inspected by a qualified technician immediately. Do not continue to operate the vehicle with suspected transmission issues, as this can lead to more extensive and costly damage.
7. Warranty and Support
For information regarding the warranty of your Sonnax 34006-SP Case Bushing, please refer to the official Sonnax website or contact Sonnax customer support directly. Warranty terms and conditions may vary.
For technical assistance, installation questions, or to verify specific application fitment, please contact Sonnax customer service through their official channels. Providing your vehicle's year, make, model, and engine size will help expedite support.
Sonnax Official Website: www.sonnax.com
