High pitch noise from rear under accel

[ShadyZealot]

Figured i would post to get an idea what you guys think before i just bring the car to a local performance shop.

I have a strange high pitch noise which seems to be coming from the rear. It doesnt seem like traditional gear whine, it is silent under decel, but when i am on the gas you hear it. Especially bad at cursing rpms.

I def dont remember it being there when i got the 4.30s and true trac put in. It seems to be getting worse.

Anybody have any idea what it could be?

 

[Bryan@suttonhp]

Your description really sounds like a gear type noise, also could be the true trac itself. Did you change any bearings?

 

[Croft]

Have you noticed what RPM you are at when you hear the noise?

 

[kevinatfms]

if its on accel it will be the face of the gear set. which means new ring and pinion.

 

[ShadyZealot]

Its really all RPMS. Gets louder as the rpms go up.

Bearings were replaced, at least i assume they were guy i paid to install the stuff said he would provide the install kit.

So it could really mean i need a new set of gears. These probably have under 10k miles.

 

[Rasmus]

I'm going to say gears -- or the install of said gears -- as well. From your description, that's what it sounds like. Pinion depth might be off?

 

[ShadyZealot]

It def wasent this loud when i first got it installed. Seems like its getting worse.

I didn't hear any noise when i first got it installed, however i also had a straight through muffler, and switched to a chambered recently so maybe thats why its so much more noticeable.

Does it sound like something i should get checked out right away? I dont want a bearing to come apart and screw up my new diff.

 

[Croft]

I woudl take it back to the shop that installed them and have them listen to it and see if they think it's the gears.

 

[ShadyZealot]

^ yeah i was thinking that. Jeff who set it up for me is real cool, he has done work for me a few times in the past. Brian actually recommended him to me. Its just he is over an hour from me so its a hike to get out there.

 

[Croft]

Call him up and explain your issue. If he is a cool cat, I am sure he willw ork with you. Good luck with it.