Will a 1998 5.7 4L60E Tahoe transmission fit 2002 5.3?

No, a 1998 5.7L 4L60E transmission from a Tahoe will likely not be a direct fit for a 2002 5.3L Tahoe. While both use the 4L60E transmission, there were significant changes and revisions to the 4L60E throughout the years. These changes include:

* Input shaft: The input shaft diameter and length may differ between the 1998 and 2002 versions. This is crucial for compatibility with the torque converter and the engine's flexplate/flywheel.

* Valve body: Internal valve body programming and components changed over the years, affecting shift characteristics and potentially causing compatibility issues.

* Electrical connectors: The wiring harness connectors may have different configurations.

* Torque Converter: The torque converter is specific to the year and engine combination.

While it *might* be possible to make it fit with significant modification (potentially involving replacing the input shaft, valve body, or other parts), it's highly discouraged. It would likely be cheaper and easier to find a used 4L60E transmission specifically from a 2002 (or very close year) 5.3L Tahoe or other compatible vehicle. Trying to adapt the incorrect transmission will almost certainly lead to problems, extra cost, and more work.