rinkishJK

It will work, but u will need to modify one side of the jks perch to fit.

BlueBennett

Ok I ordered the JKS perches from Quadratec, and I have the 3.25 lift kit from Rustys Offroad with Rustys front and rear Adj Track bars. I should have my parts by tuesday or wednesday, and i will install them ASAP.
So just line up the D-shaft and pinion flange? I have an angle finder, what should it read and where do i measure from, the diff or on the shaft?

By the way thanks for all the info, y'all have been lots of help to a JK newb.

bbrown626

I have the wedges for now. I figure that I'll try to relocate the factory mounts after replacing the rear drive shaft and setting pinion angle for that shaft. The wedges are good for now. No rub.

bbrown626

Factory drive shaft or aftermarket double Cardan? My understanding is...
For factory shafts match the angles front and back. You don't need the pinion in line with the shaft, but it can't hurt. They are CV joints on both ends.
For double cardan the pinion has to be concentric to the drive shaft (in the same line). Aftermarket shafts use a CV joint (Double Cardan) only at the transmission end. The pinion end has to be in line with the shaft to avoid vibration and damage.

CJ7nvrstk

That is correct but that is under load that it should be at 0. So, at rest, you should have a negative pinion angle.

See C&P below


Setting the pinion angle is the final step in driveline alignment. The goal is to create a straight line from the back of the crankshaft through the transmission, driveshaft, and the pinion of the differential—under load. Due to the tendency of the pinion to rise under load, some angle must be present at rest.

Read more: http://www.carcraft.com/howto/91758/...#ixzz202IW0DuT

BlueBennett

I adjusted the LCAs back to stock length, and im waiting on my JKS adjustable perches to get here. The rear pinion angle is at 11, How does this look???

BlueBennett

another pic

rinkishJK

Your driveshaft angle looks ok for a stock shaft.. It would be better for the longevity of the stock shaft to have the pinion pointed up a tad more. I would start planning on buying a double cardon style shaft because that tcase end has the shaft pinched on the bottom almost.. And u are on level ground I'm assuming.. What happens when u get some flex and the rear drops...
Also It looks like your springs are still bowed. The jks perches are very nice, just remember the driver side one needs some modification to work with a tf relo bracket.
To set your shaft in line with the tcase u measure the angle as u have it on the bottom of the diff, and on the shaft its self. So if your diff is 11, the shaft might be more like 20 or something... Just adjust your upper arms till u got 1 degree difference..
And u can use a floor jack under the pinion to help rotate/set your angle.

ASSFROW

RK correction wedges with Rancho 4 inch sport kit. Very straight right now. Haven't installed rear UCA's yet, but hopefully they won't rub.

RogueJKU77

Will the wedges work on the front springs? My passenger side coil looks a little bowed out. But the backs are fine.