yeah, showed it to them this morning, putting some miles on it per there request before I bring it back, if it gets much better, so I'm not hearing it over other things I will go back. In comparison to the way it came, I would describe the whole rear end as feeling sloppy on anything but hard acceleration or hard engine breaking. Although even my "hard" isnt that hard as I havent been able to get on it yet, cause I'm trying to honor there break in time request.

 

Now "sloppy" is definetly not what I experienced when I had an install that whined. In fact I'd have called it "tight". Between the level of noise you have described and this comment I'm thinking you do have an issue and I'd be surprised if break in will solve it...time will tell, good luck to you. Keep us informed.

 

I got the miles they wanted on it in one day... lol, just used it for work where I have to go 30 miles in X direction, then from there 30 miles in Y then 30 miles in Z all with a few hours of work inbetween. So just took highways, set cruise at 65 and didnt abuse it on on or off ramps.brining it back in like 5 minutes and handing it to them.

 

Geez... What the tech said would worry me...
He didn't keep track of the shims? If they just used the stock shims with the new gears there could be problems. The backlash should barely be visible. It shouldn't look like 1/8"

The 'paint' they put on? WTF...
I did my own gear install. 4.10s. The marking paint washes right off with a bit of gear oil. It's not going to cause noise.

Do you have any suspension mods? Upper or lower control arms?
Aftermarket control arms will cause a bit more noise to be transmitted up through the body so you would hear more of what's going on in the rearend...

I've got control arms with half poly, half rod end joints so I hear everything going on in the gears. They're very quiet. There's a very slight noise at a certain MPH. I wouldn't call it a whine though, it's more like a slight buzz and only happens when I'm just barely touching the gas pedal. Halfway between accel and decel... It's like some kind of resonant frequency...

Good luck.

 

good luck..i used frpp 4:10's and installed them myself. i also used motorcrafts lube and break in fluids.....not problems......it may be a break in period issue, but i doubt it...
sorry to hear this

 

Sounds like you get the same feeling from hearing that that I got... Also, to answer your question, no, I do not have anything done to the suspension yet.

 

hope if it is their problem they fix it right away and let you enjoy the gears without thinking so much about the whine. good thing my mechanic does only this type of stuff for a living so he knew what he was doing. like joe said, if you have a loud exhaust, or just blast the radio you'll never know its there. i can barely hear my girlfriend yapping all the time cause my exhaust is so loud haha jk

 

Well I have the mods in my sig, so my exhaust is pretty loud, and I have the shaker 1000, that I play pretty loud, and the gears still annoy me....

 

if you can hear them over both of those then there is probably something wrong with the gear install.. good luck with that. sucks to be excited about a mod then not be happy about it once it's done for some reason...