Dodge Challenger Owner's Manual page 264

262 STARTING AND OPERATING
CAUTION!
Always make sure the vehicle comes to a complete
stop before shifting into REVERSE. Failure to do so
may result in transmission damage.
You must always use first gear (or Reverse) when starting
from a standing position.
Recommended Shift Speeds
To utilize your manual transmission efficiently for fuel
economy, it should be upshifted as listed in recom-
mended shift speed chart.
MANUAL TRANSMISSION
RECOMMENDED SHIFT SPEEDS
Axle
Ratio
mph
3.73
(km/h)
mph
3.91
(km/h)
Earlier upshifts during cruise conditions (relatively
steady speeds) may result in increased fuel economy.
Higher upshift speeds may be used to obtain a desired
acceleration rate.
1-4 4-5 5-6
20 25 42
(32) (40) (67)
20 37 48
(32) (59) (77)