Vibs not gone after SYE

[KIAKillerXJ]

[font=Verdana, Helvetica, sans-serif] Well here is the deal. I put S10 leaves on my 96 with NP242. It sits just a little higher than my RE3.5 coils in front. Had horrible vibs. Did a yoke style H&T via V-Treads thread on Jeepin using a yoke, not a flange, from Driveshaft Super Store. Ordered new DS from Driveshaft Specialist. Also installed 3* shims.

Took it out this morning and the vibs are still there, starting about 65mph.

So I yanked out my new rear driveshaft and put in my front DS. While it is a little better, the vibs are by no means gone. Much better than before the SYE, but still bad enough that I don't want to take off for my trip with it like this.

I was wondering if yall had any ideas. Is my pinion on the diff perhaps to high? Take out the shims? If I let off the accelerator it seems to smooth out. But they don't start until this higher speed.

If something doesn't make sense, let me know, I'm typing fast because I'm tired, frustrated and running OUT OF TIME![/font]

 

[CartsXJ]

Check you front pinion angle. This is specially important with the 242 for some reason. Try running it without the front shaft in. Also another idea might be that you don't need the shims at all, your pinion could very well be too high, but if it still vibes without the rear driveshaft that tells me that your front d/s is the source of your problems. Your front CV could be shot, the slip joint could be worn, a bad u-joint a the pinion a number of things.

 

[KIAKillerXJ]

I moved my front DS to the rear and ran it without the front DS in.

 

[CartsXJ]

what I ment was try it with the new CV shaft and no front driveshaft. Your front driveshaft might have a worn joint and that could be the source of your vibes. Again, also look to see if you really need the shims, you actually want your pinion angle to be about a 1 degree below the shaft angle.

 

[DrMoab]

you are still running shims? What angle is your rear ujoint on? Are you running a CV type joint? I guess you would be if you put your front shaft in.

WHen you switch to a CV style shaft you HAVE to have the angle of the rear less then 3* if I remember right. Its not like having two ujoints. you don't want any angle at all.

 

[KIAKillerXJ]

[font=Verdana, Helvetica, sans-serif]See if these pics help. CartsXJ, I've tried that

http://us.f3.yahoofs.com/users/420428adz513dc03b/c51c/__sr_/de52.jpg?phEQEzCBQCOlnWhj

http://us.f3.yahoofs.com/users/420428adz513dc03b/c51c/__sr_/c3ca.jpg?phYQEzCBKeb1wn3s

http://us.f3.yahoofs.com/users/420428adz513dc03b/c51c/__sr_/c81d.jpg?phlQEzCB8TdAAsJ2

http://us.f3.yahoofs.com/users/420428adz513dc03b/c51c/__sr_/5f89.jpg?ph9QEzCBqAlHM4NN

Whole Album Here:
http://pg.photos.yahoo.com/ph/[email protected]/album?.dir=c51c&.src=ph[/font]

 

[Kejtar]

and lets not forget bad tires, unbalanced wheels, bent rims, leaf pack problems and so on....

 

[KIAKillerXJ]

I would agree but it started immediately after doing the new leaves, and I haven't drivent it accept to test the new SYE, DS and such

 

[Kejtar]

I would agree but it started immediately after doing the new leaves, and I haven't drivent it accept to test the new SYE, DS and such

make sure your leaf pack is not S shaped and that you're not suffering from axle wrap.

 

[KIAKillerXJ]

no on the s shaped leaves. I'm sure I have some axle wrap just like all lifted Xjs do, but nothign to severe

 

[Kejtar]

no on the s shaped leaves. I'm sure I have some axle wrap just like all lifted Xjs do, but nothign to severe

so you don't really know. Sine you jutst built the bpck, have someone watch the pack from a safe distance and a good angleto determine if that might be part of your problem.

 

[RCP Phx]

Heres the most likely reason,I bought the complete kit from Oscar 4 years ago and had the same problem and ended up just buying a HD kit three months later.The yoke he uses is a "slip yoke",the splines have to much clearance to be used in place of a bolt-on yoke!
BTW:Most here in PHX wont even talk to Oscar,he doesnt even have a balancer(you dont want to know how he does his work).

 

[XJ_ranger]

[font=Verdana, Helvetica, sans-serif] If I let off the accelerator it seems to smooth out. [/font]

sounds like axle wrap to me

running blocks?

how saged were the main leaves?

 

[KIAKillerXJ]

no blocks.

Put some recently balanced tires that match my front ones (31 BFG MT) just to check, the ran my front DS in the rear. Vibs almost dissapeared. Tried putting my new DS in the rear, vibs came back. I'm gonna take a trip to San Antonio tomorrow to try and get it rebalanced and hopefully that will aleviate most of my problems