Built to Hold

Build guides, transmission tech, and install notes from the Gearstar shop floor. Every unit we ship is assembled by one builder, matched to your combo, and dyno-tested before it goes out the door. This is where we show the work: what holds, what grenades, and how to spec it right the first time.

8 Basic Automatic Transmission Maintenance Tips

8 Basic Automatic Transmission Maintenance Tips

Gearstar Performance 6 minute read

Transmission maintenance is important because it can help prevent future car problems, extend the life of your transmission, and improve your vehicle's overall...

10 Signs of a Bad Transmission (And what to do)

10 Signs of a Bad Transmission (And what to do)

Gearstar Performance 6 minute read

One of the most disheartening things any car owner can hear is that you need a brand-new transmission. This is why detecting the signs of a bad...

4L60E Transmission Swap Tips and Tricks

4L60E Transmission Swap Tips and Tricks

Gearstar Performance 5 minute read

If you have questions about a 4L60E transmission swap and wondering what's the best way to do so without any hitch, then this is your ultimate guide.The...

Overachieving Overdrive With a 700R4 Transmission Rebuild

Overachieving Overdrive With a 700R4 Transmission Rebuild

Gearstar Performance 5 minute read

A good 700R4 transmission rebuild will leave you with a ride that is more powerful, durable, and with firmer shifts.In terms of power, you can get over...

5 Vehicles with Ford 4R70w Transmissions

5 Vehicles with Ford 4R70w Transmissions

Gearstar Performance 6 minute read

Today, you are going to learn more about the magnificent Ford 4R70W transmissions, why they may be the ideal fit for your car, and also get to know the top...

Gearstar - 4R70W Performance Transmission Specs, Updates, and More 

Gearstar Performance 6 minute read

The 4R70W performance transmission, an updated model from the AODE, was released in 1993 by Lincoln Mark VIII. The significant improvement of the 4R70W...