Alright if I drive my burb for a long time at a constant fast speed the 4wd engaged light on the dash comes on. Its bothers me cause all I can do is smack the shifter to make sure its really in 2HI and hope the tcase isn't somehow engaged. This is a 241 Tcase behind an SM465. Last time it happened ot me was when I moved out here to Blairsville, I drove the turnpike the whole way doing 65MPH. It came on dimly at first, then full on bright, then dimly went out and cycled like that for a time. Today it just came on dimly enough you could read the words but not like it does when it is really in 4 wheel. I almost think the fluid gets hot and somehow sets off the switch but that about doesn't make sense. The light works fine when I put it in 4 hi or lo. Any thoughts? I haven't climbed under it and checked the wiring because until yesterday my road and driveway were covered in slush.