GM 24216035
Auto Transmission Filter

Service for the hydra-matic 4t80-e transmission filter must occur exclusively during transmission overhaul while replacement of the scavenging screens beneath the bottom pan occurs when changing transmission fluid. Your first step should be lifting the vehicle before placing a drain pan below the transmission bottom pan to collect dropping fluid. Draining transmission fluid becomes partial when performing the bottom pan removal since fluid remains in both the side cover and Torque Converter but you can extract more fluid from the side cover by uninstalling its Drain Plug following bottom pan removal. Drain the transmission fluid from the pan by loosing its bolts and removing the Drain Plug from the case. The next steps include bottom pan removal along with case bolts and seal before removing the screen scavenger on both sides. Disassemble the left and right scavenger screens when you need to replace the bottom pan seal because this component requires a brand-new replacement. The inspection of both transmission case scavenger screen lip seals requires evaluation for nicks or cuts while checking the bottom pan and transmission case for dents or nicks in their sealing surfaces and evaluating the bolts for damaged threads with replacement of faulty components. Bolt torque will remain correct when sealing surfaces of both bottom pan and case receive thorough cleaning before going dry. Start by fitting the transmission case Drain Plug followed by installing the new scavenger screens for left and right sides, then connect the bottom pan and new seal before lightly tightening the bolts. Reinstall the Drain Plug and new left and right scavenger screens on the bottom pan before hand-tightening the 16 bolts to 3 nm (27 inch lbs.) and to 6 nm (53 inch lbs.). Finish by tightening them to 12 nm (106 inch lbs.). The vehicle needs a fluid top-up with dexron-iii transmission fluid following the maintenance. After adding fluid users should reset both transmission adapts and the transmission oil life indicator.

Service professionals should inspect the filter located under the side cover due to its limited service need during transmission overhaul but should replace all scavenging screens beneath the bottom pan when performing transmission fluid changes. Start by hoisting the vehicle and position a drain container under the transmission bottom pan. Most of the transmission fluid stays in the side cover and Torque Converter when you disconnect the bottom pan of the transmission because the drain operation is not complete yet. Additional fluid drainage occurs after removing the side cover plug but this procedure happens only occasionally. Start by draining the pan fluid through bottom pan bolts then unfasten the Drain Plug found in the transmission case followed by the bottom pan and its pan bolts and seal. Remove both scavenger screens from the left and right side of the transmission while keeping in mind the bottom pan seal requires replacement since it cannot be used again. It is essential to check the lip seals on transmission case scavenger screens for damages and examine transmission case and bottom pan sealing surfaces for any permanent marks while inspecting bolts for thread defects that require part replacement. The installation process demands that both the bottom pan seal surfaces and the case must be free of debris for proper sealing while bolts and holes should remain moist for retaining correct torque values. Begin by placing the Drain Plug in the transmission case followed by installation of new left and right scavenger screens and finally adding the bottom pan with a new seal and finger-tightening the bolts. Install the 16 bolts on the bottom pan in the following order: torque them to 3 nm (27 inch lbs.) then redo them to 6 nm (53 inch lbs.) and finish with a final torque of 12 nm (106 inch lbs.). Reduce the vehicle height while adding dexron (R) iii transmission fluid according to the need amount and execute a reset of the transmission adapts and transmission oil life indicator.

First, remove the oil pan and the gasket.

The color of the fluid.

Install a new seal (101), followed by the filter (100).

Fill the transaxle to the proper level, inspect the transmission fluid level, and check the oil pan gasket for leaks.

Take off the oil pan and gasket.

Because the side cover and torque converter retain some fluid.

The first step is to remove the transmission.

It requires service only during transmission overhaul.

Reinstall the case side cover and gasket, followed by the transmission.