[Aaronn]

I just put in 56"allpro rears with longer shackles..(4runner with dual cases)now I have a really bad vibration that gets worse during deceleration..will a stock toy CV fix this problem?or do I have to get a custom unit??...any help or experience would be cool..thanks

 

[DRM]

Before you buy anything - have you tried changing your pinion angle?

 

[Aaronn]

yes ,I used 2.5 degree shims

 

[wheelinjp]

Correct me if Im wrong but for cv drivelines dont you aim the pinion directly at the rear output yoke. And on u joint ones you match the degrees of the output yoke and the diff yoke within 4 degrees of each other?

[ 08-30-2001: Message edited by: wheelinjp ]

 

[Chris Geiger]

The cure for rear vibration is to install a CV in the rear on the tcase end AND rotate the pinion up so it points directly at the tcase. Here is a pick of what the pinion should look like....

 

[Aaronn]

so I have a stock toy CV out of an 89 that I'm going to get made to fit ...is that particular CV good enough to work ? ...thanks for all the help...

 

[Alabamatoy]

Originally posted by Chris Geiger:
<STRONG>...AND rotate the pinion up so it points directly at the tcase. Here is a pick of what the pinion should look like....</STRONG>

Be careful doing this - I have mine rotated like this (6 deg) and the diff fill hole will overflow with almost a quart less oil than it should. I have a very steep driveway, and I park it pointed downhill to fill the remaining quart.

 

[Chris Geiger]

Originally posted by Oso:
<STRONG>so I have a stock toy CV out of an 89 that I'm going to get made to fit ...is that particular CV good enough to work ? ...thanks for all the help...</STRONG>

Yes that CV will work and as said above you will need a little extra oil in the diff. I find adding an extra quart through the vent on top of the diff is easy to do.

 

[Cable Guy]

Check the maximim angle on that CV also. I believe the 86 and up CV's don't flex as well. I have a Tacoma front CV in the rear of my Landcruiser and it flexes like the pre-86 ones.

 

[NoBrainR]

You can make the CV flex better by taking it apart and clearancing the cone/center. Look at it before you take it apart and you'll see where they interfere.

 

[crawler#976]

check w/ Jesse at High Angle.

He can answer any tech questions about your CV, and will build your shaft to work right!

 

[4CrawlR]

Originally posted by Oso:
<STRONG>yes ,I used 2.5 degree shims</STRONG>

How did you determine 2.5 degrees was the correct angle to use? If you are getting vibes on deceleration, you probably have the pinion too low and need to raise it up a bit more: Driveline measurements

 

[Aaronn]

I used 2.5 shims because I had them on hand and seemed that any more than that would be too thick to use without putting in bolts with longer heads...