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Oil and gas producers have relied on Caterpillar since the industry's earliest days. For 60 years, we've powered the petroleum business on land. Now we go with it onto the ocean, hundred of miles out, thousands of feet down.

TH55-E90 Oilfield Transmission

Your operation depends on the power driving it. And your transmission is as crucial to your power solution as the engine. Cat transmissions are proven in the oil and gas industry and widely known for their exceptional power, leading durability, ease of operation, and shifting options.TH55-E90 transmissions are ideal for pressure pumping applications. TH55-E90 transmissions are optimized for use with Cat 3512C (HD), Cat 3516C (HD), Cummins QSK 50, Cummins, QSK 60, MTU 12V4000. and MTU 16V4000 engines.Cat transmissions are backed by the worldwide network of Cat dealers ready to support your operation with technical support, service, parts, and warranty.Cat TH55-E90 oilfield transmission. Gross input power: 2461 bkW (3300 bhp).

Product Details

Engine Specifications

Gross Input Power 2461 bkW
Gross peak input torque 12677 N·m
Rated input speed 1900 RPM
Gears 9F/0R
1F gear ration 4.67
2F gear ration 3.43
3F gear ration 3.03
4F gear ration 2.53
5F gear ration 2.22
6F gear ration 1.85
7F gear ration 1.64
8F gear ration 1.36
9F gear ration 1.00
  • Cat Engines for Optimized Power Train
    •  Cat C3512C (HD)
    •  Cat 3516C (HD)
    •  Cummins QSK50
    •  Cummins QSK60
    •  MTU 12V4000
    •  MTU 16V4000
  • Transmission Rotation
    •  Input rotation — counterclockwise
    •  Output rotation — counterclockwise(as viewed from rear)
  • Input rotation — counterclockwise
    • Output rotation — counterclockwise(as viewed from rear)
      • Torque Converter
        •  Integral torque converter
        •  Series — TC64442-ESLF
        •  Stall torque ratio — 2.23
      • Integral torque converter
        • Series — TC64442-ESLF
          • Stall torque ratio — 2.23
            • Clutches
              •  Clutches — electro-hydraulic fully modulated, oil cooled, multidisc
              •  Clutch modulation control — Cat Electronic Clutch Pressure Control (ECPC)
            • Clutches — electro-hydraulic fully modulated, oil cooled, multidisc
              • Clutch modulation control — Cat Electronic Clutch Pressure Control (ECPC)
                • Installation Connections
                  •  2 oil cooler lines
                  •  1 electrical connector
                  •  1 pump
                • Oil System
                  •  Cat Transmission/Drive Train Oil-4 (TDTO)
                  •  Sump oil temperatures
                  •  Hydraulic fill capacity — Approx. 189 L (50 gal), subject to cooler size, lines, and installation.
                  •  Filter Type — 6 micron synthetic, cartridge remote mount
                • Mountings
                  •  Input connection (flywheel) — SAE #0
                  •  Output connections (flange)
                  •  Structural application subject to Caterpillar approval
                • Control System
                  •  Electronic Control Unit (ECU)
                  •  Electronic data link, SAE J1939
                  •  Electrical system 24V
                • Electronic Control Unit (ECU)
                  • Electronic data link, SAE J1939
                    • Electrical system 24V
                      • Power Take-Off Drives
                        •  Location
                        •  Mounting type
                        •  Rated power
                      Built for it