In high range (normal operation) I get a squeal/Shimmy/shake in the drive train while in reverse only. It’s as if it slips a little bit then engages. I have read in the searches that some slippage is fairly common in reverse from time to time but the sound concerns me. It feels like it’s coming from the transfer case area and something is slipping prior to engaging. It doesn’t do it while in 4LO. I have a video of it but I can’t post it on here but I’m sure I could text it. I have a 97 LX450. 4wd works no problem just want to make sure what’s going on and repair it if need be. Any ideas?