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So glad I found this forum. I hope you guys can help me. Just got this vehicle a week ago. Test drove before I bought but that drive was fine. Then after driving I started have a popping. Started paying attention at this point and noting what happens when.
It seems I don't have any problem at all until she gets warmed up. I can drive about 20 miles with no problem. Then the OD is Off light starts flashing. Then when I decelerate to stop, I have a big popping at exactly 20 mph. I then have 2 smaller pops once I take off from my stop.
I started searching online everywhere to determine the cause. I am a female whose daddy taught them just enough not to be completely stupid, but not near enough to be able to fix my own car problems. I thought from what I've read that this issue might be a torque converter. I do have a hum after a while that sounds like road noise....like I saw one other person post about bad TC's. But I haven't seen any posts that address the popping. Please let me know what you guys think.
My recommendation would be to start by draining and examining the fluid in the transfer case, assuming you have a 4WD Explorer. I helped a friend diagnose a transfer case issue with his 96 Explorer that I would definitely describe as a popping. His truck would pop typically under a light load, such as when going up a slight incline and accelerating lightly. He found a used transfer case for around $80 which fixed the issue. He did the labor to change it out.
If changing the fluid in the transfer case has no effect, then I'd suggest changing (not flushing) the fluid and filter in the transmission so see if that helps. If you have a shop do the fluid and filter change, expect it to cost around $100-$150.