4.10 Ring and Pinion Gear Whine Noise

[sapote]

Thanks all for the info, I appreciate it. We did use a pinon depth tool to determine the pinon shim since the etched number was different on my 4.10 pinon but we kind of resorted to checking the pattern with different shims to get it as centered as possible. I will still reach out to Racewerkz and Bavarian Workshop to see if I can have one of them go through everything on my 4.10 diff to make sure everything looks alright. I'll probably also go back to stock diff bushings to bring the noise levels back down. I'll post up any updates.

The pinion has to be set with the depth tool, then using shims on the ring gear to achieve the desired patterns. If you don't set the pinion then you're swimming in 2 dimensional variables and almost impossible to get it right.

[mrgizmo04]

Will add for purposes of public data, since we spoke via PM. My wife calls my car Chewbacca, it whines like crazy. Started on poly subframe bushings and poly diff bushings. Went to stock diff bushings (stayed with poly subframe), still whines.

Sent from my SM-G950U using Tapatalk

[jvit27]

3.91 and 4.10 are Motorsport gearsets - most will have some whine. Some are lucky and they don't. My 3.91 does on initial tip-in and overrun.

[Rudbari]

Had 4.10 and it’s only whines during deacceleration with oem bushing

[fattycharged]

4.10 here, there is a noticeable whine, but that is to be expected. I would say it's all relative to how sensitive you are to high pitched noises, older you are the less you will likely notice. As everyone else has stated, bushing choice will play a major part in noise transmitting to cabin.

I'm always curious as to whether those who are very bothered by it have a completely stock interior down to the styrofoam that holds the pump in the trunk.

[Arith2]

Skip to 12:50 and he shows a perfect pattern on how the gears are supposed to touch.