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Vibration after SYE + CV. What could it be?

15K views 39 replies 14 participants last post by  bikerdude 
#1 ·
Hello jeepers,
This is my first ever post ever considering i just joined a mnute ago. The reason i join is because of the vibration in my 2003 wrangler X. I installed a rough country 6 inch short arm kit, later i will be purchasing the long arm upgrade. I also installed the rugged ridge slip yoke eliminator and an adams custom driveshaft for a 6 inch lift. I dont know what to do next. The jeep only vibrates between 30-40 mph while accelerating. Below or above that the jeep is smooth. I just wanted some suggestions if possible what to do. I dont know if i want to install blocks to drop the transfer case or what. Thanks TheOrffs
 
#2 ·
sorry everyone wrong section ment to click TJ but hit JK. But if you know anything please help me out, thanks
 
#12 ·
dk i only have a dana 35 at the moment, and everyone asking about the pinion angle i will go out and take a picture of it but its at a 0 degree angle.
 
#13 ·
TheOrffs said:
dk i only have a dana 35 at the moment, and everyone asking about the pinion angle i will go out and take a picture of it but its at a 0 degree angle.
0 degree angle to what?
 
#22 ·
Go buy a angle finder at your local hardware store. They are less than $10. Double check your angles bc even it might look "good" just eyeballing it, even being off a couple of degrees could give you the vibes.
 
#26 ·
Well, the picture is out of focus, too close and not square to the axle, but if you put a gun to my head I'd say pinion is touch low, although its close so might not be the isssue.

Have you pulled the shaft and driven in 4H just to confirm that the vibration goes away?
 
#28 ·
It does look like the pinion could be adjusted up just a touch more, but it looks to be pretty close. The pinion and the drive shaft should be the same angle, but some folks like to run the pinion down by one degree so that when the drive line is loaded up the pinion will rise to be inline with the drive shaft. I don't know which way is better one way or the other though.

I agree with the post above about pulling your rear DS and seeing if that makes the vibration go away.
 
#29 ·
That's an odd looking output yoke, looks big, bulky and long (no ****). Also looks to be a lot of drivetrain lift. Sears has the angle finder. I'm currently adjusting mine, it can be difficult to set properly by eye.

*edit

Keep in mind - the pinion isn't supposed to point to the transfer case, but instead the center ball of the DC driveshaft - that's the pivot point. If it was set by eye, that may have been what happened.

Just having a hard time getting over that output though - you buy a SYE to also shorten the output - that partly defeats the purpose.

I could be mistaken though - I ordered my SYE with a Rubicon style output flage in stead of a yoke. I thought mine stuck out a bit more than normal but nothing near that.
 
#31 ·
jutgin said:
Are we sure it's pinion angle causing vibration? Could be a number of other things.
It's the first thing he should make sure is perfect. Then move on down the list :thumbsup:
 
#32 ·
rubicon what else could it be. The tires are balanced, the jeeps aligned, pinion bearing are good, dont know what else.
 
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