The 2006 Pontiac GTO was equipped with a Tremec six-speed manual transmission (T56) as standard; no factory automatic was offered that year.
Overview of the 2006 GTO drivetrain
The GTO’s 2006 refresh kept the high-performance spirit intact, pairing a 6.0-liter LS2 V8 with a manual gearbox designed for strong acceleration and precise shifting. The Tremec T56 six-speed manual became the defining transmission for this final model year in the GTO lineup.
Transmission configuration for the 2006 model year:
- Tremec T56 6-speed manual (standard)
In summary, the 2006 GTO did not offer an automatic transmission; it shipped exclusively with the Tremec T56 six-speed manual.
Summary
For the 2006 Pontiac GTO, the transmission of record is the Tremec T56 6-speed manual. This setup underscored the model’s performance-oriented focus in its final year of production.