Increased noise with polyurathane diff bushings
#1
Senior Member
Thread Starter
iTrader: (9)
Join Date: Oct 2006
Location: Lexington SC
Posts: 1,176
Total Cats: 35
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
I swapped in a rx-7 diff housing on my wifes 97 after being rear-ended. I have noticed that there is a lot more gear whine above 55mph. Is this normal for doing the bushing swap? I am just trying to make sure there is nothing else wrong with the diff or drivetrain. I am fully aware of the fact that the stiffer bushings wil not damp out the vibration and noise that a ssofter rubber bushing would.
#6
Senior Member
Thread Starter
iTrader: (9)
Join Date: Oct 2006
Location: Lexington SC
Posts: 1,176
Total Cats: 35
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Good deal! I mean it sucks for my wife but at least I don't have to worry that something is messed up. I will be putting these same bushings on my 91 once I get the torsen swapped in. Luckily my wife mostly drives it around town at less than 55mph where it seems to be quiet. I drive at 60-65 for most of my 35 mile trip to work and it has been driving me crazy for the past few days. Hopefully the 91's exhaust will mask the diff noise.
#8
I'm a terrible person
![](/mt2011/images_td/ranks/supporter1.gif)
iTrader: (19)
Join Date: Apr 2009
Location: Arizona
Posts: 7,174
Total Cats: 180
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
I noticed the whine also... but I have another question I don't think I want the answer to.
After the diff bushings I noticed a bit of what feels like excessive gear lash maybe? If I let off the gas, then get on it there is a bit of a tap noise. Sounds like there is too much space between the gears and when it switches faces it hits with a bit of force. Is this normal or a sign something is effed? I figured maybe it was the lack of dapening in the drivetrain allowing me to hear it.
Here is the catch.. it's a Kazz diff. I had heard they have a lot of lash built into them. I know they make A LOT (and I mean A LOT) of noises already, but this one worries me.
After the diff bushings I noticed a bit of what feels like excessive gear lash maybe? If I let off the gas, then get on it there is a bit of a tap noise. Sounds like there is too much space between the gears and when it switches faces it hits with a bit of force. Is this normal or a sign something is effed? I figured maybe it was the lack of dapening in the drivetrain allowing me to hear it.
Here is the catch.. it's a Kazz diff. I had heard they have a lot of lash built into them. I know they make A LOT (and I mean A LOT) of noises already, but this one worries me.
Thread
Thread Starter
Forum
Replies
Last Post