Eldorado Touring V8-4.6L VIN 9 (1998)
Fluid Filter - A/T: Service and Repair
REMOVAL PROCEDURE
The HYDRA-MATIC 4T80-80 transmission has a filter under the side cover that requires service only during transmission overhaul. Scavenging
screens are beneath the bottom pan, which you must replace when you change the transmission fluid.
1. Raise the vehicle and support. Refer to Vehicle Lifting Points.
2. Place a drain pan under the transmission bottom pan in order to catch the fluid.
IMPORTANT: Removing the bottom pan on the HYDRA-MATIC 4T80-E only partially drains the transmission fluid. The remaining fluid is
held in the in the side cover and the torque converter. Removing the drain plug in the case after removal of the bottom pan will drain fluid from the
side cover. You do not need to drain the torque converter during most service procedures.
3. Loosen the bottom pan bolts. Drain any fluid in the pan.
4. Remove the drain plug in the transmission case.
5. Remove the bottom pan, the transmission case bolts, and the seal.
6. Remove the left and the right scavenger screens.
7. Inspect the following parts for the conditions cited:
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The scavenger screen lip seals in the transmission case for nicks or cuts. If damaged, replace.
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The bottom pan and the transmission case for dents or nicks in the sealing surfaces. If damaged, replace.
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The bolts for damaged threads. If damaged, replace.
For proper sealing, the bottom pan and the case sealing surfaces must be clean and dry. In order to maintain proper bolt torque, the bolts and the
tapped holes in the case must be clean and dry.
IMPORTANT: The bottom pan seal is NOT reusable. Replace the pan seal with a new part after removing the pan for any service.
INSTALLATION PROCEDURE
