[gipper]

84 cj7 on soa on stock springs, 1" lift shackles from PO, and I'm changing the drivetrain. I'd like to set the rear pinion angle before doing the motor swap, but I don't see that happening since my driveline is going to get all changed around.

I know cut the perches off and reweld, but I was wondering HOW you found the angle in the first place. Guess? Partially bolt it together, rotate the axle under the perches until it all lines up and then tack them?

"little help please"

 

[toy283]

When I did mine, I just set the whole thing together. Set the perches on the axle, then set the springs onto the perches and remove the jacks (no u-bolts) . Once the axle had all the weight I rotated the pinion upward to where I wanted with a floor jack and tacked the perches. Disassemble and weld fully. This method obviously won't work if you're spring under though.

For spring under, I'd put jackstands under the springs at the axle location, set the axle and perches in place (no u-bolts). Rotate to where you want them and tack in place. Remove and weld fully.

 

[BEAR]

It depends on what type of driveline you have.
If its a cv style then you point the rear yoke at the t-case so the rear u-joint is at allmost no angle and the cv takes all the angle.

If you have a regular style u-joint then use an angle finder and find the angle on the rear of the t-case and make the pinion at the same angle so both u-joints are at the same angle.

Dont be in a hurry to set them cause its better to take your time and do it right once than having to grind them off later and redo it

Good Luck!

 

[84cj7305]

From what I havce you actually want to set your rear pinion angle about 3 deg abouve the transfer case cause under load it wil rotate down 3 deg. but yeah that is the way I would do it and I would do it last after everything else is done

 

[Azzy2000]

From what I havce you actually want to set your rear pinion angle about 3 deg abouve the transfer case cause under load it wil rotate down 3 deg. but yeah that is the way I would do it and I would do it last after everything else is done

Other way around...rear pinion will roate upwards under load. So set 2 - 3 degrees under at rest.

 

[84cj7305]

yeap my bad I have been setting up my front axle so I have my mnd reversed:flipoff2:

 

[sw99]

You may want to consider letting the vehicle weight sit on the axle for a couple of days. Just dropping the weight of the vehicle on to the axle can be decieving. Let it sit for a day or two and then tack and recheck.

 

[gipper]

Yeah, sorry. It's a cv driveshaft, that's why I'm not just keeping the same angle on the 14b.

That tells me what I wanted to know though; just put it together, eyeball it and weld it up. Got it. Thanks.