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Rear End Failure
- Thread starter Lightning Struck
- Start date
Maybe another case of them installing a diff type with the wrong "ratio". I can see that messing up the PTU, things not spinning at the right speeds when the vehicle mechanical and electrical systems expect them to be pushing things to the point of failure.
Mental note , if I ever need a new rear diff, give them the exact part number for the ST!
Mental note , if I ever need a new rear diff, give them the exact part number for the ST!
So after my screen issue I finally had resolved back in July, it’s back at Ford right now and informed that I need 2 rear axles replaced. I noticed for a while that there was a noticeable clicking noise coming from the rear end when I was braking and accelerating from a stop. I was putting it off for a while because of my work schedule but finally took it in yesterday to get it looked at. I have 11k miles on it at the moment.
All these rear diff stories, ugh.
I recently installed amsoil 75W-110 gear lube and Steeda Brace. I have the Steeda Bushings, Whoosh bolt, and JXB Bushing insert sitting on my bench ready to go when I have time. I'm hoping by securing up the rear diff will avoid future problems. It may be wishful thinking, only time will tell.
I recently installed amsoil 75W-110 gear lube and Steeda Brace. I have the Steeda Bushings, Whoosh bolt, and JXB Bushing insert sitting on my bench ready to go when I have time. I'm hoping by securing up the rear diff will avoid future problems. It may be wishful thinking, only time will tell.
Here's an update on my saga. So the original dealership replaced my transfer case and I still have the same issue, a vibration coming from the rear when I accelerate and if I keep pushing down on the accelerator it starts jerking and bucking. I can actually hear the rear ties break loose with each jerk. I asked them to make sure it was the correct rdu. They told me they can't pinpoint the issue so i took it home. Then a new problem started, a loud pop from the rear diff when starting to accelerate. So now I'm at another dealership and they found the bolts loose and actually sticking out on the transmission mount and the rear diff mounting points. Tightened those and that fixed the popping noise but still have the other 2 issues. They have now updated the pcm, awd module, transmission and transfer case strategies, made sure the rear wheel hubs are tight and no help. I've stressed to them that these 2 issues started immediately after the 2nd rear diff was installed. They pulled my receipts from the other dealership to verify the part numbers but that was end of day Friday. I'm getting really frustrated as I haven't driven my car hardly at all since the beginning of November.
I am on my 3rd rear diff at 11700 miles. It all started with the howling noise at 65-73 mph. After my dealer replaced my rear diff the second time, along with all the other parts replaced, they contacted Ford Enginners. The second rear diff was for the 2.0 liter explorer, it was mislabeled and miscatalogued. Have your dealer verify part number on the unit not just the paperwork, and for peace of mind, do the calculation yourself to determine rear gear ratio, eg. driveshaft rotation count vs wheel rotation.
As odd as it sounds. It could have been the wrong ratio. I believe the 2.3's all had the same 3.58 rear end as the 3.0 L ST's. That said, if I'm not mistaken the Platinum with a 3.0 L engine came with a 3.31 rear end, it would bolt right in, but if you have a 4WD, I would think it would buck like a bronco on a dry paved road and would definitely cause issues with the electronics (2WD or 4WD) as well as the transfer case on a 4WD.
