The labyrinth of passages cast into an automatics transmission's valve-body and the parts used in it are the most determining factors of its shift characteristics. An aftermarket shift kit increases both transmission performance and longevity.
Valve bodies are hydro-mechanical mechanisms that use fluid pressure, RPM and external inputs to control shift characteristics, such as shift firmness and shift points.
All transmissions are set from the factory to allow some slippage between gear changes for smoother shifting. Most shift kits are designed to reduce this slippage to make shifts faster.
Transmissions are set from the factory to up-shift or down-shift at a certain RPM, which can change by throttle position. Most shift kits raise this RPM slightly to more efficiently exploit the engine's upper-RPM power.
Reducing slippage allows the engine to spend less time between gears and more time accelerating the vehicle. This can lead to significantly better 0-to-60-mph times in some vehicles.
Slipping clutches create heat, which causes them to break down over time. Reducing slippage can slightly increase the transmission's torque capacity and decrease heat and clutch wear.
- Photo Credit Image by Flickr.com, courtesy of R11
What Is a Short Shifter?
A "short shifter," also commonly referred to as a "short shift kit," is car-enthusiast speak for a redesigned or modified mechanism that...
Shift Leader Job Descriptions
Shift leaders keep the daily operations of an organization flowing smoothly. The shift leader is much like an assistant manager. The shift...
How to Install a Shifter
When purchasing a shifter for an automatic transmission, the number of gear positions must be taken into account. If the vehicle is...
How to Install a C6 Transmission Shift Kit
Shift kits are designed to improve your vehicle's acceleration and performance without having to modify your engine or axle ratios. The shift...
What Does an EPC Transmission Switch Do?
The electronic pressure control (EPC) transmission switch controls the EPC unit, which regulates the hydraulic pressure in your automatic transmission. This regulation...
Small Tricks to Make My 1300 Hayabusa Have More Power
The Suzuki Hayabusa is to this day one of the most powerful production motorcycles in existence. With mild tuning and a few...
How Does Shift Bidding Work?
If you run a business or organization, it can be difficult to schedule employees to work at certain hours or in specific...
What Causes Hard Shifting in an Automatic Transmission?
Transmission problems are one of the most serious and expensive vehicle issues to repair. Transmissions typically cost upwards of a thousand dollars...
Automatic Transmission Rebuild Kits
Rebuilding your own automatic transmission can save hundreds, if not thousands, of dollars over paying someone else to do it or buying...