Fix front differential and cv driveshaft
SOURCE: Front differential bearing
You do not need to remove it from the Truck for Repair. Just remember (Chalk the Wheels so it does not Roll!)
SOURCE: 1998 Chevy Blazer making clicking noise in front
Slim possibility it could be a bearing too. When it's not under load and is free-wheeling (2wd) the stress on the hub assembly changes, making the clicking more noticeable. When under a load, being driven, the pressure on the bearing would be more steady (in 4wd) and might make it less noticeable, if at all.
SOURCE: 2003 chevy suburban front axle noise
Worn side bearings is where the noise is coming from and might as well do both sides, I used replace them in about 2-4 hours, depending on where Murphy happened to be. Disconnect both side inner CV joint, front prop shaft and the 4X4 actuator line. If you want to drop the front pumpken. Not sure if you have enough room if you want to change the bearing without removing the pumpken from the frame. You should see when you disconnect the CV shaft.
The front diffs are toys compared to the rear, if you use auto4wd too much there are bearings in your tranfer case that are similar to the side bearings in the front diff. In both appearance and durability and soon you'll replace those too.
Good luck and keep me posted.
SOURCE: how to replace front cv axles in a 1999 chevy
that is a big task and your normal tool box wont have the big socket you need also a heavy duty roll jack if you really want to do this first start with a hanes manul u can get them from autozone even check there web site
SOURCE: 1990 chevy blazer 4x4 full size,,would like a
Hi! Here you go!! hope this helps you!
Testimonial: "thanks for the diagram.. very helpful in replacing my front hub assemblies..."
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