Dennis Trident

Automatic transmission fluid capacity & service interval

Dennis Trident uses automatic transmission fluid with a capacity range of 15 to 26 liters. The data covers 4 configurations.

The configuration chart below lists fill volumes and service intervals for each engine and trim variant.

Type	Specifications
Trident 3-axle (1999-2000)	Use: Normal Capacity 15 liter Code: Ecomat 5/1
Trident 3-axle (1999-2000)	Use: Normal Capacity 26 liter Code: Voith D 863.3 3/1
Trident 2-axle (1997-2000)	Use: Normal Capacity 15 liter Code: Ecomat 5/1
Trident 2-axle (1997-2000)	Use: Normal Capacity 26 liter Code: Voith D 851.3 3/1

The Dennis Trident 2-axle variant, covering 1997-2000, carries two distinct automatic transmission fluid capacities: 15 liters and 26 liters. The presence of two separate figures for the same configuration typically reflects a service fill capacity and a full overhaul or dry-fill capacity, where the larger value accounts for fluid retained within the torque converter and cooler lines during a complete rebuild.
The 3-axle variant of the Dennis Trident, introduced for 1999-2000, mirrors the same dual-capacity pattern seen on the 2-axle, with figures of 15 liters and 26 liters recorded under normal use conditions for the automatic transmission.
Both the 2-axle and 3-axle configurations share identical capacity values of 15 liters and 26 liters, meaning the addition of a third axle on the 1999-2000 variant did not alter the automatic transmission fluid volume requirements.
All four specification rows are designated under normal use conditions, indicating the listed capacities apply to standard operating environments rather than severe-duty or extended-service scenarios.
The 2-axle configuration has a model year span of 1997-2000, while the 3-axle configuration enters the specifications at 1999, giving the 3-axle variant a narrower two-year window within the overall range covered by these specifications.