Disassembling the DPO (AL4) Automatic Transmission Input Shaft
We discussed disassembling the DPO (AL4) automatic transmission in the article "Disassembling the Automatic Transmission."
Install the input shaft in a press and use a tool to press the piston to release the retaining ring (Fig. 1).
Fig. 1. Disassembling the automatic transmission input shaft: 1 - input shaft, 2 - tool.
Remove the piston retainer retaining ring, remove the tool, and take out the retainer itself (Fig. 2).
Remove the return spring and piston.
Then, after pressing again with a hydraulic press, remove the E2 clutch housing retaining ring, and remove the clutch and the first and reverse clutch disc pack (Fig. 3).
Re-compress with tool 1 and remove the E1 clutch pack retaining ring (Fig. 4).
Remove the piston itself.
Fig. 4. Using a tool to compress and remove the E1 clutch pack retaining ring.
When repairing an automatic transmission, the clutch pack (Fig. 5), pistons with retainers, and sealing rings are replaced on the shaft.
Using a puller, press out the input shaft bushing (Fig. 6).
Press in a new input shaft bushing using a hydraulic press (Fig. 7).
Assemble the input shaft of the automatic transmission in reverse order.
