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.
545RFE Transmission Specs and Schematic
The 545RFE transmission is an electronically controlled unit that was great for its time until it was replaced bu the 65RFE and 66RFE. Read below for...
The Ultimate Guide to the 4L80E Transmission
The 4L80E transmission is an automatic transmission designed by General Motors. Learn more about this legendary transmission.The 4L80E transmission was...
Overview of the 4L65E Transmission
Gearstar - Overview of the 4L65E TransmissionThe 4L65E transmission developed by General Motors for GM trucks – but adapted for the Chevrolet Corvette – is an...
History of the 4L60E and How It Stacks Up Against the 4L80E
The 4L60E is one of General Motors' most versatile and durable 4-speed transmissions. So how does it stack up to it's counterparts?The 4L60E – whose...
Overview of the 4R70w Transmission
The 4R70W also requires consistent maintenance, just like its predecessors.This way, you will have an incredibly powerful transmission.The 4R70W, a Ford...
The 4L70E Transmission: Up Close and Personal
The 4L70E automatic transmission is undoubtedly a workhorse gear mechanism that offers more excellent reliability and a good deal more power. Read on for...