Noise From Transmission In All Shift Lever Positions

Noise from transmission in all shift lever positions

Diagnostic Procedure:

1. ATF pump worn or binding

2. ATF strainer clogged

3. Mainshaft, countershaft, secondary shaft, and intermediary shaft bearings worn or damaged

4. Idler gears worn or damaged

5. Thrust washer seized, worn, or damaged

Also check for:

- Check the line pressure. A/T Pressure Test
- Improper alignment of the ATF pump and torque converter housing may cause ATF pump seizure. The symptoms are mostly an rpm-related ticking noise or a high pitched squeak.
- Check the ATF strainer for debris. If the strainer is clogged, find the damaged components that caused the debris. If no cause for contamination is found, replace the torque converter.
- Inspect the differential pinion gears for wear. If the differential pinion gears are worn, replace the differential assembly, replace the ATF strainer, thoroughly clean the transmission, and clean the cooler and lines.
- Replace the torque converter.
- Be careful not to damage the torque converter housing when replacing the main ball bearing. You may also damage the ATF pump when you torque down the main valve body. This will cause ATF pump seizure, use the proper tools.
- Install the main seal flush with the torque converter housing. If you push it into the torque converter housing until it bottoms out, it will block the fluid return passage and result in damage.
- Inspect the countershaft and the secondary shaft for wear and damage.
- Inspect the park mechanism at the park lever link, park gear, and 2nd gears.
- Inspect the mainshaft, the countershaft, the secondary shaft, the intermediary shaft, and idler gears for wear and damage.
- Check the thrust washers on all shafts for seizure, wear, and damage.