Designation:

TN54

Info
Manufacturer: David Brown and Santasalo  
Product type: Transmission & Drives  
Name: Transmission  

Development

This fully automatic transmission has been developed under contract to the UK MoD, to be interchangeable with the TN37 transmission installed in the Challenger 1 MBT. The TN54 is now in production for the Challenger Armoured Repair and Recovery Vehicle and for the Challenger 2 MBT which are now in service with Qatar and the UK.

Description

The TN54 has a single input and two in-line outputs at right angles to the input. Drive is transmitted from the engine through a splined coupling to a torque converter. The gear and direction of travel are engaged by correctly sequenced application of multiplate clutches, actuated hydraulically and controlled by electro-solenoid valves. The TN54 transmission features six forward and two reverse gears, a hydrostatic double-differential steering system and integral oil-cooled multiplate main vehicle and parking brakes.

The transmission has integral filtered lubrication and hydraulic systems. A Power Take-Off (PTO) for power pack cooling fans is mounted on top of the main casing.

Alternatively the transmission is supplied with a mechanical steer unit incorporating controlled slip multiplate clutches.

TN54 is also available to suit transversely mounted engines and in this designation it is known as the TN54U.

Variant

  • DB-1500

This has been developed as a private venture and is an uprated version of the TN54.

Status

In production for Challenger Armoured Repair and Recovery Vehicle and Challenger 2 MBT. In service with Oman and the UK. By mid-1999, over 450 TN54 transmissions had been built.

Specifications:
Property Value
Engine power output (h.p.)
1500
Number of forward gears
6
Number of reverse gears
2
Maximum torque (Nm)
1500
Weight (kg)
2390

Included in:
Product Amount
Challenger 2 (Main battle tank)
1
Challenger 2E (Main battle tank)
1
Challenger ARRV (Repair and recovery vehicle)
1



   
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TN54
TN54