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CX35-P800 Oilfield Transmission

CX35-P800 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.Ideal applications for Cat CX35-P800 transmissions include workover rigs, hydraulic fracturing, kill mud pumps, coil tubing pump support, nitrogen units, acidizing units, and cementing units. CX35-P800 transmissions are optimized for use with C15 ACERT, C18 ACERT, and C27 ACERT engines (A ratings).Cat CX35-P800 oilfield transmission. Gross input power: 597 bkW (800 bhp). Configurations available include basic and integral pump drives.

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Gross Input Power800BHP

Gross Peak Input Torque2700ft-lb

Rated Input Speed2100r/min

Maximum Turbine Torque2700ft-lb

Minimum Input Speed600r/min

Electrical System24V

Gear TypePlanetary Spur


1F Gear Ratio5.73

2F Gear Ratio3.57

3F Gear Ratio2.72

4F Gear Ratio1.95

5F Gear Ratio1.43

6F Gear Ratio1.00

7F Gear Ratio0.74

8F Gear Ratio0.63

1R Gear Ratio-4.46

Overall Gear Ration9.10


C15 ACERT, C18 ACERT, and C27 ACERT (A ratings).


Input rotation — counterclockwise

Output rotation — counterclockwise(as viewed from rear)


Lock-up clutch, torque converter drive in all gears integral to transmission

Stall torque ratio - 1.962


Clutches — electro-hydraulic fully modulated, oil cooled, multidisc

Clutch modulation control — Cat Electronic Clutch Pressure Control (ECPC)


2 oil cooler lines

1 electrical connector


Cat Transmission/Drive Train Oil-4 (TDTO)

Sump oil temperatures

Maximum converter outlet oil temperature — 250°F (121°C)

Hydraulic fill capacity — 9 gal (34 L), 16 gal 61L) initial fill

Direct mount filter


Input (flywheel) — SAE #1 dry flywheel housing

Side supports — two SAE #2 pads

Output — 1810 yoke, 1810 companion flange, SPL 250 yoke, ISO 8667-T180 flange


Remote mount ECU

Remote mount filter option



Mounting type: 10 bolt

Rated torque

Rotation: same as engine

Ratio, 1:1


Remote mount oil filter


Location: 1 o'clock and 11 o'clock as viewed from rear

Mounting type

Rated torque

Rotation: same as engine

Ratio - 1:1


Location: 5 o'clock as viewed from rear

Mounting type: 8 bolt (SAE pump adapters and drive flanges available from third party suppliers.

Rated torque: 1000 lb-ft (1360 Nm)

Rotation: Opposite of engine

Ratio - 1.25:1



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