4L60E Teardown and Inspection (Full Length Version)

Description :

From 0:00 to 4:40 the presenter introduces the 4L60E transmission, its history, and the tools needed for the teardown. Between 4:41 and 13:33 the bell housing is removed using a torch. The external case is examined from 13:14 to 33:48, with discussion of disassembly and internal components. A pan through the case belly follows from 33:49 to 56:26. Pump examination takes place from 56:27 to 1:12:00, followed by reverse input drum inspection from 1:13:00 to 1:21:00, forward drum inspection from 1:22:00 to 1:47:00, and remaining internal case examination from 1:48:00 to 2:21:00. A bonus segment on valve body testing with a Sonnax vacuum tester is shown from 2:22:00 to 2:27:00. The video also discusses rebuild considerations, stock versus high‑performance options, and parts selection, as well as additional pump and forward drum information. The presenter notes that the stator journal should be checked for wear and heat damage, and that the filter pickup seal should be replaced during overhaul. He also explains that ‘PWM’ stands for Pulse Width Modulation, referring to the torque converter clutch application strategy introduced in 1995. He advises ensuring that sealing rings move freely in their grooves and that worn lip seals can cause slippage or clutch burn up.