The (officially the GMH Trimatic) is a 3-speed automatic transmission produced by General Motors–Holden in Australia from the early 1970s through the mid-1980s. Fitted to a wide range of Holden vehicles (from the HQ series through to the VK Commodore), as well as some Japanese and European cars assembled locally, the Trimatic is robust but has unique variants. Correct identification is critical for ordering parts, servicing, or performing a swap.
The most reliable identification method is the small metal tag riveted to the left-hand side (passenger side) of the transmission case. This usually starts with two letters (e.g., Deciphering Codes: Commonly found on late HZ models with a 202 (3.3L) engine.
Some tags feature a letter category, such as "Cat = A," which relates to the original vehicle application (e.g., WB commercial vs. passenger sedan). 2. Bellhousing and Case Features Full-Circle vs. Notched:
V8 input shafts are generally stronger and can be identified by the number of splines or specific machining marks compared to the lighter 6-cylinder versions. 4. Pan Identification What transmission is in my Holden car? - Facebook Jan 9, 2569 BE —
The most immediate way to identify a Trimatic is by its physical profile:
The (officially the GMH Trimatic) is a 3-speed automatic transmission produced by General Motors–Holden in Australia from the early 1970s through the mid-1980s. Fitted to a wide range of Holden vehicles (from the HQ series through to the VK Commodore), as well as some Japanese and European cars assembled locally, the Trimatic is robust but has unique variants. Correct identification is critical for ordering parts, servicing, or performing a swap.
The most reliable identification method is the small metal tag riveted to the left-hand side (passenger side) of the transmission case. This usually starts with two letters (e.g., Deciphering Codes: Commonly found on late HZ models with a 202 (3.3L) engine. holden trimatic identification
Some tags feature a letter category, such as "Cat = A," which relates to the original vehicle application (e.g., WB commercial vs. passenger sedan). 2. Bellhousing and Case Features Full-Circle vs. Notched: The (officially the GMH Trimatic) is a 3-speed
V8 input shafts are generally stronger and can be identified by the number of splines or specific machining marks compared to the lighter 6-cylinder versions. 4. Pan Identification What transmission is in my Holden car? - Facebook Jan 9, 2569 BE — The most reliable identification method is the small
The most immediate way to identify a Trimatic is by its physical profile:
