I have about 360 miles on the cat and am hearing a gear noise from the rear. This starts about 45mph in a easy drive situation. Let off on the gas and it stops. It will continue up to about 65 mph. After that, it may still be there but can't notice because of road noise. I have heard of other challengers with this situation but not 'Cats. Have others had this happen?
Rear end whine
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I had gear whine from when I picked it up until about 350 miles. I've got just over 600 miles now. I was out today and didn't notice any gear whine. For me it's about 55 to 65 under very light throttle when I'll hear it.
I'll have to take notice tomorrow when I'm driving. Supposed to be a nice day so planning on driving the cat...
I'll have to take notice tomorrow when I'm driving. Supposed to be a nice day so planning on driving the cat...
Mine does it too. It has 1200 miles.
The rear end whine is pretty common in the manual 6-speed.
Some of the folks that were bothered by it switched out the rear-end gear oil and said the noise is less using RP 75W-140 Synthetic Gear Oil or Wolf's Head 85W-140 Gear Oil.
My 2009 has made that whine since new, but I don't even notice it any more.
I don't recall anyone complaining about it in an automatic with LSD.
Some of the folks that were bothered by it switched out the rear-end gear oil and said the noise is less using RP 75W-140 Synthetic Gear Oil or Wolf's Head 85W-140 Gear Oil.
My 2009 has made that whine since new, but I don't even notice it any more.
I don't recall anyone complaining about it in an automatic with LSD.
Maybe you deaf like meI don't notice it in my m6. Could be because I am focused on the supercharger whine. I'm going to pay more attention and see.
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13,620 Posts
Could be having the radio at 35. LolMaybe you deaf like me
I've never really understood why proper break in procedures for the rear differentials are not listed in owners manuals. Esp. for the hellcat where there is great desire to do burnouts & hot rod it way before you should.
This is a good tech article on how a ring & pinion should be broken in.
New Gear Break-In
Quote From Randy of Randy's Ring & Pinion. Of course we won't be towing with the Cat.
" After driving the first 15 to 20 miles, stop and let the differential cool before proceeding. Keep the vehicle at speeds below 60 mph for the first 100 miles. I also recommend putting at least 500 miles on the new gear set before heavy use or towing. During the first 45 miles of towing, it helps to go about 15 miles at a time before stopping to let the differential cool for 15 minutes before continuing. This is necessary because not all of the gear tooth is making contact until it is heavily loaded. When towing, the teeth flex to contact completely, and cause the previously unloaded portion of the teeth to touch and work harden. It is very easy to damage the ring & pinion by overloading before the teeth are broken-in. If you take it easy on a new ring & pinion and keep it full of high quality oil, it will last a lot longer."
This is a good tech article on how a ring & pinion should be broken in.
New Gear Break-In
Quote From Randy of Randy's Ring & Pinion. Of course we won't be towing with the Cat.
" After driving the first 15 to 20 miles, stop and let the differential cool before proceeding. Keep the vehicle at speeds below 60 mph for the first 100 miles. I also recommend putting at least 500 miles on the new gear set before heavy use or towing. During the first 45 miles of towing, it helps to go about 15 miles at a time before stopping to let the differential cool for 15 minutes before continuing. This is necessary because not all of the gear tooth is making contact until it is heavily loaded. When towing, the teeth flex to contact completely, and cause the previously unloaded portion of the teeth to touch and work harden. It is very easy to damage the ring & pinion by overloading before the teeth are broken-in. If you take it easy on a new ring & pinion and keep it full of high quality oil, it will last a lot longer."
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13,620 Posts
Pretty similar to break in, which I did follow exact. I'm not hearing noise so maybe I did something right!
Don't blame ya there
LOL old manMaybe you deaf like me
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Oh, you went there! This may not end well for you rookie! Lol
OH! I forgot to add these two links for identifying gear noise. Results may vary.
Diagnosing Noise Part 1
Diagnosing Noise Part 2
Diagnosing Noise Part 1
Diagnosing Noise Part 2
That's your rear end 'whining' over the beating it's about to get now that the drag radials are mounted LOL. That's a totally different type of whine
OH! I forgot to add these two links for identifying gear noise. Results may vary.
Diagnosing Noise Part 1
Diagnosing Noise Part 2
Bro !!! I don't have time to read all that !!!!!! hahahaha
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