Two calibrated digital torque wrenches in one kit: a 3/8-inch 3.7 to 37 ft-lb and a 1/2-inch 14.8 to 147.5 ft-lb, both with a beep and LED at target torque.
This combo covers the two torque ranges you reach for most on a transmission bench and under the truck. You get the ARM601-3 in 3/8-inch drive, reading 3.7 to 37 ft-lbs, for valve body bolts, pan bolts, pump bolts and small case fasteners where a big 1/2-inch wrench is clumsy and easy to over-torque. Alongside it is the ARM601-4 in 1/2-inch drive, reading 14.8 to 147.5 ft-lbs, for bellhousing bolts, converter-to-flexplate bolts, crossmember and mount hardware, and driveline flange bolts.
Both are electronic, not click-type, so you dial the target value on the LCD and the wrench buzzes and flashes an LED the instant you hit it. Readouts switch between ft-lbs and Nm. Because it reads live torque, you can also use it to check a fastener that is already tightened without loosening it first, which is how you verify a suspect converter or pan bolt without guessing.
Each wrench ships in its own hard-shell case with a certificate of calibration to ISO 6789. Both run on 4 AAA batteries (not included). Keep them stored in the cases and re-check calibration periodically; a torque wrench that lives loose in a drawer drifts.
| Type | Electronic (digital) torque wrench combo kit, two wrenches |
| 3/8-inch wrench (ARM601-3) | 3.7 to 37 ft-lbs (5 to 50 Nm) |
| 1/2-inch wrench (ARM601-4) | 14.8 to 147.5 ft-lbs (20 to 200 Nm) |
| Units | ft-lbs and Nm, switchable |
| Alert | Audible buzzer and LED flash at target torque |
| Calibration | ISO 6789, certificate of calibration included with each wrench |
| Power | 4 AAA batteries per wrench (not included) |
| Includes | Two digital torque wrenches, two hard-shell cases, instruction manual |
| Manufacturer part number | ARM601-34 |
| Manufacturer | ACDelco |
