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2006 chevy trailblazer_ls
2 Posts
Discussion Starter · #1 ·
First off, thanks for the awesome forum that's saved me countless hours and dollars.

Switching to any 4wd mode causes switch light to blink on that mode while clicks and whirrs occur as expected, but light goes back to 2wd & service 4wd light comes on. No apparent power in front wheels and outer wheel doesn't slip while making sharp turns in any 4wd mode.

Troubleshooting so far:
I removed actuator from the front axle disconnect to observe it actuating, and then the 4wd switch will display as engaged when activated. The actuator whirr has a constant pitch when uninstalled, but when installed, the whirr drops in pitch like it's getting resistance from the plate in the front axle disconnect. I can push that plate in with my finger, but I don't know how far it should go in. 2 yrs ago, I replaced the actuator for a similar issue.

Transfer case fluid is due for a change. Would that cause the issue, and if so, is there any troubleshooting I should do before or while changing it?

Thanks for any help!
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