Need advice on "SERVICE 4WD" warning

[SJ]

TJ:

I've only used 4LO and Rear Axle Lock once. There is a "clunk" when the eLocker is engaged - the dealer stated that this is normal when they gave me my orientation back in July. The Owner's Manual also states that a "clunk" is normal as the splines engage.

What you don't want to hear is a grinding noise. I've blown 3rd members on previous vehicles and that's when a flat-bed is brought in to haul to the nearest shop.

Does your H2 drive OK in 4HI? Are the panel lights still off or is 4HI illuminated during normal driving? Have you tried re-engaging 4HI Locked or 4LO Locked?

My GMC Yukon had the same service light, but I was able to reset the message. The Transfer Case's electronic sensor detected high temperatures and thus gave a warning.
I don't know if the H2 is equipped with the same sensor, but excessive heat may have caused a temporary problem.

Last question: were you running fast (e.g. above 25 mph) in 4LO w/ Rear Axle Locked?