strange sound on 98Jimmy

Is it a 4x4? Could be the transfer case chain getting very loose.

Brian

You may have what was a common occurrence with these transfer cases. The snap ring on the rear output shaft would break, which allows the entire output shaft and internal components to move enough that the drivetrain in the t/case jumps out of engagement momentarily. Usually happened when you put a good load on it (like accelerating).

That's one thing I would check out. If you catch it early, you can simply install a new snap ring and away you go. If you keep driving it while it makes that noise, you are simply destroying components in the t/case.

Ian

You would remove the rear driveshaft, remove the four bolts that hold the rear extension housing on, and you should see the snap ring, or where it's supposed to be. It sits in a groove on the output shaft on the rear side of the big roller bearing that supports the output shaft.

Ian