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drive trace

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.

drive range

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.

drive shaft

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.

drive line clunk

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.

drive line vibration

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.

drive line

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.

Drive Cycle

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.

drive gear

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