AIR SUSPENSION SYSTEM (2500/3500 MODELS) — IF EQUIPPED
Description
This air suspension system is a rear leveling ride height system. The main purpose of
this system is to maintain the truck’s rear ride height level. There are two selectable
heights that can be chosen based on your operating conditions.
The system requires that the ignition be in ON/RUN position or the engine running
with zero vehicle speed for all user requested changes and load leveling.
Normal Ride Height (NRH)
– This is the
standard position of the suspension and
is meant for normal driving. It will auto-
matically adjust to maintain the rear ride
height as conditions change.
Alternate Trailer Height (ATH)
– Lowers the
vehicle approximately 1 in (25 mm) for a
level truck, to be used as required while
trailer towing. It will automatically adjust
to maintain the rear ride height as condi-
tions change.
Trailer Decoupling/Unloading
– The air suspension system will load level (lower/
exhaust only) for up to 10 minutes after the vehicle is turned off. This allows for easy
removal of a trailer and/or load from the back of the truck by maintaining the ride
height. After 10 minutes you will need to turn the ignition to the run position for the
air suspension to maintain ride height. If the air suspension system is disabled using
the settings menu (Tire Jack Mode, Transport Mode or Alignment Mode) the system
will remain disabled when the vehicle is turned off. Reactivating the air suspension
can be accomplished via the settings menu or driving the vehicle above 5 mph
(8 km/h) for Tire Jack Mode or Alignment Mode and 16 mph (26 km/h) for Transport
Mode.
NOTE:
• Most 3500 models will not lower to Alternate Trailer Height (ATH) when unloaded.
• Refer to “Trailer Towing” in “Starting And Operating” for further information.
Ignition OFF Behavior
For a predetermined amount of time after the ignition is off the air suspension may
adjust to maintain a proper appearance.
Refer to your Owner’s Manual on www.ramtrucks.com/en/owners/manuals for further
details.
Alt Trailer Height Button
O P E R A T I N G Y O U R V E H I C L E
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