Glossary “drive side” Definition:
The convex side of a gear tooth.

Glossary “drive trace” Definition:
Grapic display of the driving conditions for an I/M 240 test. The vehicle is driven on a dynamometer to match speed, acceleration, and deceleration shown on the trace. The trace can also be used to pinpoint when and where a vehicle failed the I/M test.

Glossary “drive pinion flange” Definition:
A flange used to connect the rear of the drive shaft to the rear axle drive pinion.

Glossary “drive pinion gear” Definition:
One of the two driving gears located within the transaxle or rear axle housing. Together the two gears multiply engine torque.

Glossary “drive plate” Definition:
See flex plate.

Glossary “drive range” Definition:
Selector lever range which allows the transmission to eventally go into a higher gear range. Or, the state or stage of being in high range in non-overdrive units.

Glossary “drive shaft” Definition:
An assembly of one or two universal joints connected to a shaft or tube used to transmit power from the transmission to the differential.

Glossary “drive shaft installation angle” Definition:
The angle the drive shaft is mounted off the true horizontial line, measured in degrees.

Glossary “drive line clunk” Definition:
Loud noise that can be attributed to total powertrain response to torque reversals in the system, including, but not limited to, backlash in the transmission, driveshaft and axle.

Glossary “drive line torque” Definition:
Transfer of torque between the transmission and the driving axle assembly.

Glossary “drive line vibration” Definition:
Vibration felt in the floor pan and/or seats with no visible shaking. It is often accompanied by a rumble or similar noise. Usually felt at speeds over 30 mph.

Glossary “drive pinion” Definition:
The gear that takes its power directly from the drive shaft or transmission and drives the ring gear.

Glossary “drive by wire” Definition:
To use an electronic throttle control rather than mechanical linkage.

Glossary “drive coil” Definition:
Hollow field coil in a positive engaged starter that is used to attract the moveable pole shoe.

Glossary “Drive Cycle” Definition:
The purpose of the OBDII drive cycle is to assure that all of the on-board diagnostic tests (monitors) have been run on the vehicle so that all of the I/M flags are set to READY or COMPLETE.

Glossary “drive fit” Definition:
Term used for interface fit.

Glossary “drive gear” Definition:
Combination of two operating gears, the first is the drive gear (input) and the other is the driven gear (output).

Glossary “drive line” Definition:
Assembly of various parts such as the driveshaft, universal joints, and connecting yokes that transmit torque from the transmission to the differential.

Glossary “drive away shudder” Definition:
Strong vibration felt and heard in the floor pan and seat, usually during heavy acceleration, usually present between 0 and 25 mph.