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vibration or whining

1K views 34 replies 6 participants last post by  clamphier 
#1 ·
I just got gears and a drive shaft. If the pinion angle on the driveshaft isn't perfect will it vibrate or make a weird noise, or is it going to be the gears?
 
#6 ·
I don't think it's gear whining though I don't want to leave it. Its not loud it's more like a hum that's why I think its the driveshaft. I've checking it twice the backlash is good and the pattern is nearly perfect on the gears. That's why I'm confused
 
#7 ·
If its ur drive shaft then thats an even bigger problem! If its vibrating then u do know it will blow up and high speeds! The point of a new drive shaft is to shed weight and be able to rotate even faster but if its slightly off even a tiny bit, when at high speeds it will end up vibrating more and more to the point of it exploding. Be very careful and try and pin point the issue.
 
#9 ·
If its whining only during acceleration that sounds like a pinion bearing. It could be the preload wasn't set correctly, the bearing could be damaged... I would take it back and get it fixed.
 
#28 ·
Did you get a noticeable improvement when you put your drive shaft in? I have 3.73's installed, had them for about a month. My gears were silent till I lowered the car, now I can just bary hear them on decel but I have to almost try to hear them, if you didn't try to hear them you never would. I have a DSS aluminum 1 piece literally sitting in my room that I still need to put in, I got it because it had the CV joint over U joints front and back. Think I may put that in tomorrow, I'm glad others have this and are lilting it.
 
#29 ·
I think so! But I did gears, a driveshaft, and headers the same day so I couldn't tell what the difference was because I didn't do it individually. I threw it on the dyno today so I wanted to make sure I'd be good going above 140. But it cut a good fifteen pounds off and I think acceleration and shifting is a lot smoother with it. I also have upper and lower control arms a 2 inch drop and mine whine a little bit too, its the same as you I have to try to hear it. If you have it for sure put it on though it helps and it makes it where you don't have to adjust the pinion angle. It cuts down a lot on vibration too.
 
#30 ·
I will put it on as soon as I get the correct bolts from the drive shaft shop. The hex bolts I got barely thread into the adaptor plate and I found that I was not the only one with this issue. Apparently, quite a few slipped out the door with this issue. It's a simple fix but i will have to wait for the new bolts before installing this now.....
 
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