AIRCAT 801 Composite Air Ratchet 3/8 in Drive 35 ft-lb

The AIRCAT 801 is a 3/8 in drive composite-housing air ratchet: 320 RPM free speed, 35 ft-lb maximum torque, 8.5 in long, and just over a pound in the hand. It runs a single pawl mechanism and AIRCAT's muffled exhaust, so it is noticeably quieter than the older all-steel ratchets that scream every time you pull the trigger.

On a transmission this is the tool that saves your wrist on bolt counts. Dropping a pan means twenty-odd 8 mm or 5/16 in bolts, and a valve body adds another dozen or more, most of them in a spot where a hand ratchet only swings a few degrees before it hits the case or the crossmember. The 801 spins them out under its own power and the slim composite head fits between the pan rail and the floor pan on vehicles you have not lifted very far. It is also the right size for bellhousing bolts you can reach, cooler line bracket bolts, and the inspection cover.

Use it to run fasteners down and back out, not to set final torque. Pan bolts and valve body bolts on most automatics are single-digit ft-lb, well under this tool's 35 ft-lb ceiling, and an air ratchet has no way to tell you when it got there. Snug them with the 801, then come back with a click or beam torque wrench and do the final pass in sequence. Over-torqued pan bolts are how you dish a stamped steel pan rail and end up chasing a leak you created.

The composite housing matters more than it sounds. A steel ratchet body pulls heat out of your hand on a cold shop floor and gets slick the second it picks up ATF. The composite shell stays neutral and gives you something to hold onto when the tool is covered in fluid, which on transmission work it will be.