Compare/McCormick-Deering Super WD-6 vs McCormick-Deering T-40

McCormick-Deering Super WD-6 vs McCormick-Deering T-40

Verdict: McCormick-Deering Super WD-6 vs McCormick-Deering T-40

The McCormick-Deering Super WD-6 and the McCormick-Deering T-40 are both tractors — here is how they stack up on the figures that matter. McCormick-Deering Super WD-6 leads on rated power with 41 hp against 35 hp. McCormick-Deering Super WD-6 is the lighter machine (2,494 kg vs 5,792 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. McCormick-Deering T-40 holds more fuel (159.0 L vs 77.6 L) for longer stints between fills. McCormick-Deering Super WD-6 is the newer design (1952 vs 1937). In short: choose the McCormick-Deering Super WD-6 for outright pulling power, or the McCormick-Deering T-40 if a tighter budget and lighter footprint matter more. Compare the full spec tables below before booking a demo.

Tune the fit score

Tell us about your operation

Acreage600 acBudgetMain crop / use

Fit & specs

McCormick-Deering

Fit score

Best match

Clear

McCormick-Deering

Fit score

Best match

Clear

Rated power

41 hp

35 hp

Confidence

40%

Guide price

—

Overview

Manufacturer

McCormick-Deering (a part of International Harvester)Reference

The Torque Amplifier was available on the Super WD-6-TA in 1954Reference

Gasoline 5-speed crawlerMay 4 - 14, 1937Link: Nebraska Tractor Test 281 fileReference

Total built

—

1,313Reference

Drive

—

crawlerReference

Variants

Super W-6

gasoline engineReference

—

WD6-TA

Torque Amplifier transmissionReference

—

Engine

Fuel tank

77.6 LReference

159.0 LReference

Drawbar (claimed)

24.6 kWReference

26.1 kWReference

Drawbar (tested)

28.4 kWReference

33.0 kWReference

Belt (tested)

34.9 kWReference

38.5 kWReference

Displacement

4.3 LReference

4.9 LReference

Bore/Stroke

102 x 133 mmReference

95 x 114 mmReference

Compression

16.5:1Reference

—

Rated RPM

1450Reference

1750Reference

Firing order

1-3-4-2Reference

—

Starter volts

12Reference

—

Coolant capacity

26.5 LReference

45.4 LReference

Belt power (max)

34.9 kWReference

38.5 kWReference

Max power

28.4 kWReference

33.0 kWReference

Belt (claimed)

—

33.6 kWReference

Transmission

Type

two-speed power shiftReference

gearReference

Gears

10 forward and 2 reverseReference

5 forward and 1 reverseReference

Clutch

dry discReference

Transmission

International Harvester Torque AmplifierReference

—

PTO & Hydraulics

PTO (claimed)

30.6 kWReference

—

Dimensions

Weight

2494 kgReference

5792 kgReference

Front tire

6.00x16Reference

—

Rear tire

15.00x30Reference

—

Ag front

6.00x16Reference

—

Ag rear

15.00x30Reference

—

Length

317 cmReference

358 cmReference

Width

177 cmReference

165 cmReference

Height

228 cmReference

165 cmReference

Super WD-6 Serial Number Location

Super WD-6 Serial Numbers

1952

501Reference

—

1953

2277Reference

—

1954

8997Reference

—

Final

9084Reference

—

Test results

Belt fuel use (max)

12.5 l/hourReference

—

Max pull

2656 kgReference

4333 kgReference

T-40 Serial Numbers

1937

—

6652Reference

1938

—

7921Reference

1939

—

8706Reference

Location:

—

Seat, right sideReference

Fit score weighs budget, operation size, crop match and data confidence against the details above. It’s guidance, not advice — always confirm with a dealer demo.