Yes — it's a common swap configuration — but it requires the right adapter components. The LS engine family uses a specific bellhousing bolt pattern that is different from the Gen I and Gen II small-block Chevy pattern.
LS BELLHOUSING PATTERN: The LS bellhousing bolt pattern is unique to the Gen III/IV LS family. It is NOT the same as the Chevrolet small-block pattern used on 283, 327, 350, and 400 engines, and it is NOT the same as the big-block Chevy pattern.
TRANSMISSIONS THAT BOLT DIRECTLY TO AN LS: These transmissions were designed for use with LS engines and use the native LS bellhousing bolt pattern: • 4L60E — the most common LS transmission in trucks and cars • 4L80E — heavy-duty option, used in HD trucks and performance applications • 6L80 and 6L90 — used in late-model LS-powered trucks and performance vehicles If you are using any of these transmissions with an LS engine, no adapter is needed. You will still need to confirm flexplate compatibility (especially with early LS engines — see article SR-04908).
TRANSMISSIONS THAT REQUIRE AN ADAPTER: If you want to use an older transmission with an LS engine, you'll need an adapter plate: • 700R4 / 4L60 (non-electronic): Requires an LS adapter plate • TH350: Requires an LS adapter plate • TH400: Requires an LS adapter plate Adapters are available from several aftermarket suppliers and are a reliable solution for hot rods and custom builds.
FLEXPLATE NOTE: Regardless of which transmission you use, confirm that your flexplate matches both the LS crankshaft snout length and the transmission's starter ring gear pattern. See article SR-04908 for details on early LS crank lengths.
For help selecting the right transmission or components, call 1-844-XPARTS-1 or email support@expediaparts.com.
