...drive and you can verbally demonstrate when the issue occurs
Bring a couple copies of TSB 25-2351 25 July 2025 (TSB 25-2351 supersedes TSB 24-2386 (which supersedes TSB 24-2185 which supersedes TSB 23-2335)
If you haven’t had the RDU vent hose installed and a drain and fill of the RDU fluid...
A hammer, a screwdriver and a crying towel.
I,ve had two dealership Look at and drive my BS only to tell me it was Cylinder deactivation. Now they want to replace parts and glue it back together. Maybe I can get a third dealership to say it is deactivating and use the Florida Lemon Law.
It...
...am not sure if TSB 25-2351 applies to models like the Badlands with Twin-clutch 4x4 Rear Drive Unit. TSB 25-2351 states “… on vehicles equipped with a single active torque RDU only”
TSB 25-2351 (supersedes TSB 24-2386 which supersedes TSB 24-2185 which supersedes TSB 23-2335)
TSB Date...
TECHNICAL SERVICE BULLETIN
Chatter/Shudder During Low Speed Turning Events
25-2351
25 July 2025
This bulletin supersedes 24-2386. Reason for update: update the Service Procedure and Part List.
Model:
Ford
2021-2024 Bronco Sport
2019-2024 Edge
2020-2024 Escape
2022-2024 Maverick...
...in the future )
If you are having RDU issues, arm yourself with information, Search for the following to see related owner posts:
25-2351
24-2386
24-2185
23-2335
https://www.broncosportforum.com/forum/search/1663971/?q=25-2351&o=date...
...is it’s a relatively small percentage of the total vehicles produced but I have no way to know
You can read through a number of owner reports by following the links here:
https://www.broncosportforum.com/forum/threads/tsb-24-2386-chatter-shudder-during-low-speed-turning-events.16524/post-260959
“According to mechanic the drain tube for the rear differential gets clogged from road debris and dirt gets into rear differential". So what happens if dirt gets into the rear diff? Does it need a flush? Does the dirt cause damage?
You can see the hose (RDU vent hose) pictured in TSB 24-2386:
https://www.broncosportforum.com/forum/threads/tsb-24-2386-chatter-shudder-during-low-speed-turning-events.16524/
@Jube Drain tube (RDU vent hose) for the rear differential gets clogged
Edited 7-9-2025:
TSB 24-2386 Chatter/Shudder During Low Speed Turning Events
(supersedes TSB 24-2185 which supersedes TSB 23-2335)
See this link for TSB 24-2386...
...a link to a thread containing inks to other owner’s posts with the same issue, not sure is helpful but maybe you’ll see something useful
TSB 24-2386
(supersedes TSB 24-2185 which supersedes TSB 23-2335)
see Post #2...
Search for the following to see related owner posts:
25-2351
24-2386
24-2185
23-2335
https://www.broncosportforum.com/forum/search/1663971/?q=25-2351&o=date
https://www.broncosportforum.com/forum/search/1637783/?q=24-2386&o=date...
I also have a 2021 Bronco sport with the chatter/shudder during low speed turns. My warranty is out, dealer telling me it’s all out of pocket. Took to local mechanic and he did the TSB 24–2386. He confirmed that my problem fits with that service bulletin. I need the recommended dry vent hose...
Thanks to the local @Discount Tire, I had hoped to make a side by video comparison between these two tires, similar to the reviews Campus Automotive does, having first confirmed, that if I ordered one of each tire and then returning both, without ever mounting either, that I would get a full...
I just got a message from Eibach. I seems they have prototype coilovers on a Maverick! Maybe by this time next year they will have coilovers available for the Sports? Also interesting that they put the new Milestar Patagonia A/T Pro tires on it. I asked @Discount Tire about them earlier but...