3-Piece Click Torque Wrench Set, 1/4, 3/8 and 1/2 in. Drive

Three click-type torque wrenches in one case: a 1/4 in. drive reading 20-240 in-lb, a 3/8 in. drive reading 5-50 ft-lb, and a 1/2 in. drive reading 10-180 ft-lb. Each has a 72-tooth reversible ratchet head (5-degree swing), a laser-etched scale, and is factory calibrated to plus or minus 3 percent.

Why a transmission bench needs all three: valve body bolts, solenoid and lead frame screws, and pan bolts on most automatics are specified in inch-pounds, often 8-12 ft-lb or less, which is below where a 3/8 or 1/2 in. wrench is accurate. The 1/4 in. wrench covers those. The 3/8 in. handles case-to-extension, pump-to-case and cooler line fittings, and the 1/2 in. covers bellhousing, crossmember, driveshaft and flexplate-to-converter bolts.

Set the value on the scale, lock the handle, pull smoothly at the grip until the head clicks, and stop. Over-torqued valve body bolts warp the separator plate and cause cross-leaks and shift complaints; overtightened pan bolts crush the gasket and leak. Back the wrench down to its lowest setting before storing it.