problem with 4low
i recently took my 07 fx4 on an old washed out ATV trail that was just large enough for my truck. The 4wheel drive low was making a lot of poping noises when ever the front end was flexing. i thought the truck came stock with front and rear lockers but i may be rong. its never sounded like it was in that much pain before, than again it was a fairly extreme trail for a truck with only 31s. any advice would be great.