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Gearstar Transmissions

About Gearstar Performance Transmissions

Having worked with Zack and the team at Gearstar for over 15 years I can honestly say they are great people and stand behind their equally great work! Transmissions are tailor made to match the requirements of the end user's application. Simple as that. They do what they say and say what they do!

Ryan Manson
Motor Trend

Gearstar’s owner, Zack Farah, got his start over 25 years ago at Tristar International where they were manufacturing upwards of 100 transmissions each day and 300 converters.

While bulk production was Tristar’s bread and butter, the portion of the work on high performance transmissions drew Zack’s interest “The high performance or racing transmission customer is building his pride and joy,” explains Zack. “The demands placed on these machines is a lot different from those placed on the family car.” Realizing that at that time very few companies were offering anything other than off-the-shelf transmissions from the big manufacturers, Zack split from Tristar and started Gearstar with the goal of building the best high performance transmissions specialized to the individual needs of the most discerning customers.

Zack sums up the attitude of Gearstar this way:

A transmission is what your wife has in her minivan. What we are building are horsepower transferring systems. Whether it is a Turbo 350 transmission going behind a mild small block or a 4L85E transmission built for a 528 Hemi, we approach each transmission as if is was going into our own personal car.” It is that pride in craftsmanship that makes Gearstar the top choice for the most discerning drivers and enthusiasts.


Our Shop


Assistant Manager

Gearstar's Assistant Manager, Larry brings over 38 years experience in the automotive industry to Gearstar with ASE certifications in automatic transmissions and transaxles. Larry is Gearstar's know-it-all. He can build anything from the most common transmissions like a Chevy 350, 700-R4, or GM 6L80/6L90 to the most exotic transmissions like the Mopar NAG-1. Larry is not afraid of a challenge and enjoys working on late model and import vehicles.

'I love being able to get my hands into the latest model automatic transmissions.'

Our Shop

Mark W.

Shop Manager

Gearstar's Shop Manager, Mark has over 28 years of experience with building transmissions. He got his start on the old cast irons, slim jims and hydromatics, and met Zack at Tristar in 1986. Today Mark is known for his work on Level 4 Chrysler and Ford transmissions.

'A transmission technician is like the automotive industry's heart specialist, both in the level of expertise and precision required.'

Our Shop

Doug K.


Starting at Tristar in 1982, Doug's transmission expertise with GM, Chrysler and Ford was quickly recognized by Zack who recruited him for Gearstar. Doug is in charge of Gearstar's tear down area and is an expert torque convertor manufacturer. He attended Tri C Technical School, is a trained Dyno Technician and is ASE Certified.

'I've worked with Zack for as long as I can remember and could never imagine working for anyone else.'

Our Shop



Bryan's expertise in fabrication and welding combined with his 18 years of automotive experience has proven to be an invaluable addition to the Gearstar team. He specializes in GM transmissions including the CH-350 and 4L60 / 700-R4.

'From day to day, I never do the same thing – this is definitely NOT a factory job! Custom built really mean just that. And here at Gearstar, I throw away better parts than I used to use at my former employers!'

Only the best of the best.

From the many builders at his previous company, Zack selected the best 11 builders. He then cut those 11 down to just the top five. With a team made of truly “the best of the best,” Gearstar became one of the first companies to manufacture high performance automatic transmissions to the specifications of the engines, horsepower and torque output, rear gear ratio and the application which it is to serve.

To maintain consistency and quality during the building process, each transmission is handled by a single builder. We are also employee owned by people that have a true passion for what they do. Unlike many other transmission manufacturers that have been bought and sold three or four times over, Gearstar has only ever had one owner.

Ford Transmissions

GM Transmissions

Mopar Transmissions

High Performance Automatic Transmissions & Converters | Gearstar Performance