96 4x4 transfercase slipping, gears grinding

[tahoe96]

any info? while in 2wd at low speeds - 1 & 2nd gear, 4x4 wants to
engage and the gears grind. what would be the cause of this??
truck has 112,000 miles always been serviced.

please help.

[oldyeller]

sounds like the problem I had. check the clip on the rear output shaft its probably broke. do this by removing the rear driveshaft, and the tail of the transfer case, there is 4 bolts holding it in place. then grab the output shaft and see if it has any front to back movement. if so pull it all the way to the rear and you should see a groove at the front part of the shaft where the clip goes. Then you should find the pieces fo the clip in the tail housing or on the ground. I found my replacement clip at a local tranny shop. Hope this helps..