Safe-T-Track Clicking
Short answer: A click from one rear wheel during slow tight turns is common on GM posi units — it’s typically the clutch cones momentarily slipping/grabbing (and that jolt can ring through the driveshaft). It’s usually not alarming if backlash and pattern are good.
First try the cure: add two bottles of GM posi additive (not generic), do several sharp left/right turns and some backing up to circulate it; if it persists, change the gear oil and add two more bottles. Also check the transmission output-shaft bushing (4-speed cars wear these ~40k miles under hard use) as another possible source.
Any proposed updates, changes, pictures, and/or corrections, please use our comment section below (may need to click on permalink to access comments feature). Information is subject to change and offered as is without any warranties or guarantees. Please review our Term's Of Use for more information.
Content last modified: June 13, 2026 at 10:06 am
← Frequently Asked Questions
