Our '08 EL Limited has developed a rather nasty noise in 4WD (all modes). In 2HI a very slight low pitched hum can be heard at 50+ mph. Turn the selector to 4A (above 20 mph) and a noticeable roar starts. Sounds like I'm running 38" Super Swampers.
I changed the front diff oil and noticed some very slight amounts of metal. Don't know that it's enough to determine that a part has failed.
Is there any history of problems wtih transfer cases and/or front diffs?
We bought it new and it now has 90k miles. 4wd used very seldom. Occasional light snows here in WV along with the need to put it in 4wd every once in awhile when moving the horse trailer around on the farm.
Any ideas where to start? I was thinking of removing the front drive shaft, putting it in 4wd and see what happens. I'm thinking that if it still makes noise, then it's likely the transfer case. If not, then it's the front diff.
Wheel bearings and hubs all seem to be good (replaced one bearing and inspected the other) and it doesn't seem to pull in either direction in 4wd.
I changed the front diff oil and noticed some very slight amounts of metal. Don't know that it's enough to determine that a part has failed.
Is there any history of problems wtih transfer cases and/or front diffs?
We bought it new and it now has 90k miles. 4wd used very seldom. Occasional light snows here in WV along with the need to put it in 4wd every once in awhile when moving the horse trailer around on the farm.
Any ideas where to start? I was thinking of removing the front drive shaft, putting it in 4wd and see what happens. I'm thinking that if it still makes noise, then it's likely the transfer case. If not, then it's the front diff.
Wheel bearings and hubs all seem to be good (replaced one bearing and inspected the other) and it doesn't seem to pull in either direction in 4wd.
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