Well Service Transmissions TH48-E70

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Key Specs

Gross Peak Input Torque
4422 ft-lb
5995 N·m
Rated Input Speed
2100 r/min
2100 r/min
Maximum Turbine Torque
7442 ft-lb
5489 N·m


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.Ideal applications for Cat TH48-E70 transmissions include pressure pumping, kill mud pumps, coil tubing pump support, nitrogen units, and acidizing units. TH48-E70 transmissions are optimized for use with Cat C27 ACERT and C32 ACERT, as well as Cummins QST30 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 TH48-E70 oilfield transmission. Gross input power: 1118 bkW (1500 bhp).

Product Specifications for TH48-E70

Gross Peak Input Torque 4422 ft-lb 5995 N·m
Rated Input Speed 2100 r/min 2100 r/min
Maximum Turbine Torque 7442 ft-lb 5489 N·m
Gear Type Straight spur planetary Straight spur planetary
Gears 7F/0R 7F/0R
1F Gear Ratio 6.16 6.16
2F Gear Ratio 4.52 4.52
3F Gear Ratio 3.33 3.33
4F Gear Ratio 2.47 2.47
5F Gear Ratio 1.82 1.82
6F Gear Ratio 1.36 1.36
7F Gear Ratio 1.00 1.00
Width 34 in 866 mm
Height 43 in 1092 mm
Weight 3735 lb 1692 kg
Length 66 in 1681 mm

TH48-E70 Standard Equipment

Cat Engines for Optimized Power Train

  • Cat C27 ACERT
  • Cat C32 ACERT
  • Cummins QST30 (950-1500 bhp ratings)

Transmission Rotation

  • Input rotation — counterclockwise
  • Output rotation — counterclockwise(as viewed from rear)

Torque Converter

  • Integral torque converter
  • Series
  • Stall torque ratio


  • 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. 114 L (30 gal), subject to cooler size, lines, and installation.
  • Filter Type — 6 micron synthetic, cartridge remote mount


  • Input connection (flywheel) — SAE #0
  • Output connections (yoke) — GWB 390.60/GWB 390.65
  • Structural application subject to Caterpillar approval

Control System

  • Electronic Control Unit (ECU)
  • Electronic data link, SAE J1939
  • Electrical system 24V

Power Take-Off Drives

  • Location
  • Mounting type: SAE 8 bolt (J704)
  • Rated power

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