BUSHING, TH400/4L80E CASE BUSHING (NO WALK-OUT) SONNAX 34006-SP

The OEM case bushing in vehicles with a THM 400 or 4L80-E transmission tends to “walk-out” of the housing bore. This allows the bushing to wander into the extension housing, leaves the output shaft unsupported, and may ruin the governor gear. The cause of this problem is the lack of a flange or “stop” surface on the case bushing to prevent the “walk-out” from occurring if the bushing begins spinning in the bore.