- T -
Tri-Chevy
1955, 1956, and 1957 Chevrolets.
Tri-Coat
A painting system having three layers of topcoat paint.
Tri-Oval Track
A racing course with three high-banked turns such as at the Daytona International Speedway.
Tri-Power
A triple two-barrel carburetor setup.
Tri-Y Header
An exhaust manifold setup that pairs cylinders according to their firing order to provide better exhaust scavenging.
Triangulation
The arrangement of frame members for greater durability and rigidity.
Triaxle Suspension
A suspension consisting of three axles with a means of equalizing weight between them.
Trichloroethylene
A chlorinated cleaning solvent often used in aerosol brake cleaner.
Trickle Charger
A battery charger with a very low output.
Trigger Holdoff
A control that allows for adjustment of the period of time after a valid trigger during which the oscilloscope cannot trigger.
Trigger Level
The voltage level that a trigger source signal must reach before the trigger circuit initiates a sweep.
Trigger Slope
The slope that a trigger source signal must reach before the trigger circuit imitates a sweep.
Trigger Slope
The slope that a trigger source signal must reach before the trigger circuit initiates a sweep.
Trigger Source
The signal that supplies the scope with its trigger or starting point. This can be either internal or from an external source.
Triggering
Using a signal to start one or more events.
Trip
1. A key cycle (key on, run, key off/power-down ) where the enable criteria for a particular diagnostic are met and the diagnostic test runs. 2. Ignition cycle and engine run sequence in which the PCM runs emission control monitors.
Triple Evacuation
The process of evacuating a system that involves three pump downs and two system purges with an inert gas, such as dry nitrogen (N).
Tripod
The central part of certain CV joints having three arms or trunnions with needle bearings and rollers running in grooves or races in the assembly.
TRL
Transmission range low.
Trophy
An award for achievement, such as winning a race.