There is a loud Bang (sporadic) when transmission downshifts?

Tiny
GAMACHED
  • MEMBER
  • 2016 JEEP WRANGLER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 145,000 MILES
When in automatic and I need to accelerate to maintain speed going up hill, there is a loud bang coming from passenger side. Does not happen all the time and cannot reproduce at will. Normally it happens when down shifting 45-40 MPH or 65-60 MPH. If I drive back roads rarely happens, usually a highway issue. Taken to two dealerships and they cannot reproduce, and nothing shows up on scans. I am thinking it might be related to the transfer case. Suggestions?
Sunday, August 20th, 2023 AT 5:42 AM

2 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,135 POSTS
Can you please shoot a quick video with your phone so I can hear the noise? That way I can tell for sure what's going on. You can upload it here with your response. Where in the vehicle is noise coming from, front, middle rear? I can help but I am going to need more information. It sounds like it could be a rear driveshaft coupler. Check out the images (below). Please let us know what happens.
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Sunday, August 20th, 2023 AT 4:24 PM
Tiny
GAMACHED
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Will do, it will be a few days before I am on the highway again.
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Sunday, August 20th, 2023 AT 4:31 PM

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