Hi guys, hoping for some help. I recently completed rebuilding my 08 which was a insurance rebuild. Replaced the fender, rocker and quarter on the passenger side as well as front upper a arm and hub, rear hub, a arm and half shaft (used). The problem i have is on tight turns in either direction there is a grinding, growling, rubbing noise from the rear. At first i thought wheel bearing but it doesnt seem to make any noise in a straight line. I changed the diff fluid and used friction modifier, no change. Took the passenger side rear liner out to make sure it wasnt rubbing, still no change. Wondering if the used half shaft i put in had issues or if its diff related. Any insight you guys can offer would be appreciated. Car is lowered with kw btw. Thanks
Rear Noise on Sharp Turn
- Thread starter 70cuda
- Start date
rw99
Enthusiast
Almost sounds like you have a locker in the rear. Do you know for certain that the diff is a stock unit?
gofastr
Enthusiast
I had the same problem with my 08. Replaced the center chunk under warranty.
Starting to think it is probably the rear end, have been considering an OS Giken with 3.55s but not quiteready to pull the trigger until I'm sure it's the issue. Any chance the halfshafts could cause that type of noise? I'm running out of ideas???
mjorgensen Woodhouse
Enthusiast
I have seen bad halfshafts make a popping noise. Did it slip in easy when you replaced it? Is there excessive slop inside to outside movement or is is very tight?
PAvenomRT/10
Enthusiast
Sounds like a differential problem similar to the post above and the reply by Sonoman.
PAVenomRT/10
PAVenomRT/10
A bit more info, I went to a big open lot and did figure 8s. After going around about two or three times the noise went away. Drove the car home 10 minutes and the noise was back??? Earlier I had a buddy who owns a trans and diff shop come for a ride, he suggested I add additional friction modifier and said he would use ford modifier, guess he feels the ford stuff is pretty good? Any thoughts???
(I'm going to do 3.55s with a Giken later anyway but it'd be nice to be able to hold off for a couple months as I've spent a lot on my toys lately.)
(I'm going to do 3.55s with a Giken later anyway but it'd be nice to be able to hold off for a couple months as I've spent a lot on my toys lately.)
Sonoman
Enthusiast
I knew a guy who had some clunking issues in his (non-Viper) Hydra-Lok and added half a bottle (2 ounces) of friction modifier and it cured the problem. So you never know, and it is a cheap thing to try, but you may not want to use a whole bottle since you've already got a full dose in there. Obviously, with collision damage, something could be tweaked. Interesting that doing some figure 8's temporarily cured it. You might talk to a rear end specialist and see what they say... the basic Hydra-Lok assembly is shared with many Jeep products so everyone in the differential biz is familiar with them (the Viper has a specialized aluminum housing but other than that it's the same type of mech as other Hydra-Loks). Devin at Unitrax can be a great source of info on these if he has time to speak at you!
RyanRC187
Viper Owner
Sounds very similar to the issue I posted about today. Does it still make the noise if you depress the clutch while in the sharp turn, or put the shifter into neutral? Mine doesn't...
fqberful
Enthusiast
Man that sure sounds like a rear wheel bearing OR a CV either the joint itself or the retaining nut at the bearing. The retaining nut is an easy check. The CV's aren't too hard to check and the bearings are pretty simple to remove as well. That's where I'd look. In my experience covering a lot of years, LSD style diff's don't "pop" or clunk sharply, they may chatter which you can feel but not hear.
As long as you're positive some previous owner didn't put a Detroit Locker or similar diff in it, I'd be looking at the bearings and axles.
--FQB
01sapphirebob
Enthusiast
Sounds like you are on the right track with this idea. My '01 Viper made a noise in the rear end but no one could figure out what is was. I just lived with it. Then whe I ahd all my fluids changed (including the diff.) the noise went away.
Yeah, I did just do new fluid and modifier but same issue. Can anyone see a problem with adding another 4 ounces of modifier, could it cause issues to do that? I did originally think wheel bearing but I don't think that noise would go away after doing figure 8s and there is no play when checked by rocking wheel top and bottom, also no discernible noise in straight line. Will try tightening the big retaining nut with the cotter pin, anyone know the torque spec? As far as the cv goes is there a way to check them? I do have a spare I could try but was leaning away from it as a possibility since the noise occurs while turning left or right. Thanks for the input guys.
You might want to check your emergency brake pads, especially the inner ones since they tend to wear out faster than the outer ones and cause similar noise you are describing. That is what happened to me but unfortunately, I did not catch it in time and had to replace the rear rotors as well.
update: spoke to Devin at Unitrax, great guy to deal with, very helpful. He suggested I try adding Ford friction modifier to my existing Mopar diff fluid and modifier. He said this would not be the ideal set up (double dose of modifier) but to try it and see. It definately helped, the noise is not gone altogether but a marked improvement so obviously I have a diff issue. Looks like it will be time for an OS Giken and 3.55s in the winter but I am going to drive the car as is until then.
wirepaladin08
Enthusiast
I had the same type of noise coming from the rear of my 2008 coupe. Kind of a deep "growling" noise when making a sharp turn at low speed. It would not happen all the time by any means. This began at about 5000 miles. My local Dodge dealer serviced the differential and the noise stopped and has not returned.
johniew398
Enthusiast
I have the same thing on my 08; but only occurs for a few seconds after making a right turn. Guess I will have the dealer servie the rear end to see if it will stop it.
