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  #1  
Old 05-18-2020, 01:59 PM
wbg wbg is offline
230 Tornado
 
Join Date: Apr 30, 2020
Location: SC
Posts: 10
My first J10

My intentions were to purchase a stock J10 and install a 6" lift kit with 35" tires.

What I ended up with is an 83 J10 that somebody has done a SOA conversion to and it has 35" tires.

My question to you guys is, can I add a lift kit for a little more height without having to do anything complicated like drive shaft changes etc?

I didn't know if the SOA already maxed out the height without making more complicated changes...

The current springs are old and rusty and the shocks were installed upside down?

Thanks for any replies.
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  #2  
Old 05-18-2020, 02:43 PM
Heavy_Metal_Thunder_81's Avatar
Heavy_Metal_Thunder_81 Heavy_Metal_Thunder_81 is offline
Cherokee Outlaw
 
Join Date: Jan 10, 2006
Location: Haze Gray
Posts: 7,267
Unfortunately, an SOA is about at the limit for these rigs before you need to do the more complicated work like mess with driveline angles and such. You could, however, get a set stock height springs from BJ's Off-Road and that would bring you up a bit from the sagged out factory springs you have.

Also, the shocks are usually installed upside-down on an SOA due to clearance with the axle tubes.
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  #3  
Old 05-18-2020, 05:20 PM
wbg wbg is offline
230 Tornado
 
Join Date: Apr 30, 2020
Location: SC
Posts: 10
Thanks, that's the kind of info. I was looking for. The old springs do look kinda flat...
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  #4  
Old 05-18-2020, 05:24 PM
wbg wbg is offline
230 Tornado
 
Join Date: Apr 30, 2020
Location: SC
Posts: 10
The front differential wasn't angled correctly and the shaft is sticking too far out. If I use shims to correct it, how do I know when it's right? What's the procedure?

Thanks,
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  #5  
Old 05-18-2020, 06:18 PM
wbg wbg is offline
230 Tornado
 
Join Date: Apr 30, 2020
Location: SC
Posts: 10
Any suggested YouTube videos on the subject?
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  #6  
Old 05-18-2020, 08:01 PM
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bufurd bufurd is offline
327 Rambler
 
Join Date: Apr 13, 2008
Location: ashland wi.
Posts: 575
Shimming the front axle....???? For what, point the yolk up some to help U-joint angle? The steering (caster) will be messed up to the point of I wouldn't want to try and drive it.....
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Abner-73 He started it all in 1979 (plow truck now)
Bufurd-69 Fixed up to take Abners place as DD
Delta-70 Built for fun, 455 Olds, T-18, D-20, 4:10 gears
Humpty-74 J-20 4BT, NV4500, 30+MPG
07 JK Wife bought new...
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  #7  
Old 05-19-2020, 04:34 AM
wiley-moeracing wiley-moeracing is offline
350 Buick
 
Join Date: Feb 15, 2010
Location: arizona
Posts: 1,217
It starts to get expensive when lifting a truck higher, you will need to have the front diff tubes cut moved and re welded by a diff shop, then your stuck with that set up, no changing lifts around again without pulling diff out and doing the same.
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  #8  
Old 05-21-2020, 03:54 PM
wbg wbg is offline
230 Tornado
 
Join Date: Apr 30, 2020
Location: SC
Posts: 10
I think I'm catching on now. The shims are for the rear axle if needed for vibration problems. The front axle can't be done this way because of steering so the axle tubes have to be cut and rotated to point the pinion upward.

Is that correct?

This truck has been like this for a long time and they have used 4 wheel drive. It has locking hubs and they stay unlocked, so there's no issues traveling on the highway.

My main concern is that the front shaft is sticking out about two inches and it's real wobbly.

Can I just have the front shaft lengthened for reliable crawling speed 4 wheel drive when needed?
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  #9  
Old 05-21-2020, 04:08 PM
wbg wbg is offline
230 Tornado
 
Join Date: Apr 30, 2020
Location: SC
Posts: 10
How do you know when the front pinion angle needs to be adjusted? When things start breaking?
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  #10  
Old 05-21-2020, 05:37 PM
wiley-moeracing wiley-moeracing is offline
350 Buick
 
Join Date: Feb 15, 2010
Location: arizona
Posts: 1,217
First you will need to have your final lift done, no more ups or down because once you do this it will be for that particular setup. You really need it to go to a good axle shop that will cut the welds and rotate the pumpkin to the correct driveshaft angle needed to keep the u joints alive then they move the knuckles to get the caster and camber correct to make it drive straight. Then you will have to have a new driveshaft made to fit correctly, all this is not easy or cheap but is the correct way to get it done.
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  #11  
Old 05-23-2020, 03:30 PM
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bufurd bufurd is offline
327 Rambler
 
Join Date: Apr 13, 2008
Location: ashland wi.
Posts: 575
Keep in mind, under load the rear pinion rotates up and the front rotates down magnifying the problem. U-joints will take a lot, binding/bottoming out for lack of a better word will break em. What makes you think your angle is excessive? Just because the shaft is too short doesn't mean things are needing all that work. Easy to shorten a driveshaft, lengthening is a different story. I'm running a J-truck now with a hot 455 Olds that the front shaft was too short and a bit wobbly. 40,000+ miles ago when I put it together I had an extra slip joint that was tight like it should be spline wise. I used my chop saw and cut about 2 1/2" off it and welded it to existing slip joint using shaft splines to align it before welding. It has held up well, lots of wheeling and a few truck pulls.
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Current fleet
Abner-73 He started it all in 1979 (plow truck now)
Bufurd-69 Fixed up to take Abners place as DD
Delta-70 Built for fun, 455 Olds, T-18, D-20, 4:10 gears
Humpty-74 J-20 4BT, NV4500, 30+MPG
07 JK Wife bought new...
13 Grand Cherokee Trail Hawk, wifes new ride
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  #12  
Old 05-24-2020, 09:13 AM
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bufurd bufurd is offline
327 Rambler
 
Join Date: Apr 13, 2008
Location: ashland wi.
Posts: 575
As for seeing if U-joint is binding, lift it up so axle is at full droop (that can be shortened if need be) lock the hubs and spin the axle, if it's not binding you're good. If it is a floor jack under axle to lift it to see when binding goes away, if it doesn't take much limiting the travel as mentioned is an option. Then address shaft length.
__________________
Current fleet
Abner-73 He started it all in 1979 (plow truck now)
Bufurd-69 Fixed up to take Abners place as DD
Delta-70 Built for fun, 455 Olds, T-18, D-20, 4:10 gears
Humpty-74 J-20 4BT, NV4500, 30+MPG
07 JK Wife bought new...
13 Grand Cherokee Trail Hawk, wifes new ride
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