I found this... and Im confused...

[Bounty__Hunter]

1065562

I was talking about using the front CV driveshaft for the rear, having it shortened.

After you do the SOA and SYE, you install the CV driveshaft. Enough acronyms for ya :lol: With a CV shaft, the pinion must point straight at the transfer case output, not parallel with the output as with a stock driveshaft. Confused yet?[addsig]

 

[Snitty]

1065570

right.... so it is best to have the SYE BEFORE the SOA, so you can set your pinion angle correctly... but... i've heard that bringing your pinion up there can starve the pinion bearing of oil... has anyone heard of this being a problem? i've never ran into anyone with trouble... but i've heard much about it... i guess you could just overload the axle with oil by filling it with the rear raised[addsig]

 

[Bounty__Hunter]

1065641

i've heard that bringing your pinion up there can starve the pinion bearing of oil... has anyone heard of this being a problem? i've never ran into anyone with trouble

Never heard of anybody having trouble with it on a SOA YJ. I have heard of it, though, and it's the same reason you would not take a low pinion diff and try to make it a high pinion diff by flipping it and putting it on the other end of the jeep.

A buddy of mine put a D60 rear axle in his SOA YJ, and accidentally put it in upside down :-O Luckily I caught the mixup before he got too far, but the perches did have to be redone. I saw that the diff was high pinion and figured a D60 from a stock J20 was low pinion, but what do I know. Then I saw the brake lines on the bottom of the axle tube, and the diff web was stamped 09D, which was D60 upside down. He would have gotten in to take off forward, and gone backwards :lol: [addsig]

 

[Snitty]

1065673

hah.. i've often thought of that... he'd have a variable reverse speed, and one REALLY slow forward[addsig]

 

[Bounty__Hunter]

1065680

Ya, how cool would 4 or 5 reverse speeds be? 1 forward speed, slow, would suck.[addsig]

 

[Joopin]

1065688

So last night I looked up SYE on google and looked through a bunch of websites. I found instructions for the full SYE kit and read that too... I can probably do it but it looks like it will add alot to the project. Then I came across some jedi site, he had a bunch of stuff all about his jeep on it. He mentioned that his SOA was accompanied by a "hack and tap" SYE which is what bounty mentioned earlier in this post. He gave a quick run down of what is involved and it doesn't seem difficult at all, it took him 1.5 hours... the hack and tap that is. So now that I know it is easier, and I have HEARD that it is just as good as a complete kit, maybe I should do the hack and tap thing.
Now onto today, I called my mechanic who is really great at what he does (anywhere from lifts to building custom engines) and I told him that I wanted a spring over lift. He right away said that it would be a BIG lift. He said when I'm all said and done I would have a 10 inch lift at least! I didn't realize it would be that big, and I heard it was 6 inch max. But 10 inches would include the new tires I assume. I also asked him about the Hack and Tap SYE, and he never heard of it. He told me he had a 60 something Jeep Truck (wagoneer? I don't know about the trucks) which he put an SOA on. He said he was running 44s on it with no problem, no rubbing. SO... it seems the more I research this the more I don't know what the hell is going on. He said I should just start at the desired tire size and go from there... get the appropriate lift to clear the desired tire size.
All I can say now is... AAAAARRRRRRRRRG![addsig]

 

[Bounty__Hunter]

1065753

A SOA will net about 5.5" of lift, or approximately the thickness of the axle. Plenty to clear 33" and 35" tires on a YJ.

A 'hack and tap' is easy, and cheap, and effective. Just doesn't come with a CV driveshaft, so you'll have to order that after you install the SYE and take the appropriate measurements.[addsig]

 

[Snitty]

1065764

can the yj tailhousing be modified to support the HAT system[addsig]

 

[Bounty__Hunter]

1065766

can the yj tailhousing be modified to support the HAT system

You have to get the $200 HAT SYE, which includes the new tailhousing. I'll be using a TJ tailhousing on my YJ, so I can use the $100 SYE. Try to get your hands on a TJ tailshousing from somebody who installed a high-end SYE and replaced the tailhousing.[addsig]

 

[Shane]

1065797

Ok i'm at the same place joopin is, i've got a 4'' suspension lift, no body lift. If i go with a SOA on that, how high am i going to be? too high? I'd like a nice comfortable highth, with good articulation, but hey-i'm not to sure where to go from here. its a YJ by the way. thanks-Shane[addsig]

 

[Bounty__Hunter]

1065801

You don't want a SOA with 4" lift springs, 9.5" of lift is just rediculous and good only for show. A SOA is a major change for you, since you'd have to put on different leaf packs. If you need a little more tire clearance, try a 1" body lift, or trimming your stock flares, or installing TJ flares like I did.

Remember that most jeepers with SOA suffer too much spring wrap, so it's best to add a long leaf to the stock spring pack. This also makes the leaf packs last a little longer, since they tend to sag fast when SOA due to the silly amount of flex. Some companies are now offering leaf springs specifically for YJ SOA applications, they help reduce spring wrap and resist early fatigue.[addsig]

 

[Shane]

1065807

Where would i find TJ flares? How much, and would i be better off with those or the 1'' body lift? Thanks again[addsig]

 

[Bounty__Hunter]

1065820

You can find TJ flares used pretty cheap, $50 to $100 for the set. Check out all the online 'for sale' forums, and at Jeeps Unlimited :-D

Better to go with the TJ flares, but that's if you don't mind trimming the sheet metal a little bit. This will give room for larger tires, yet keep the center of gravity lower. A 1" body lift will slightly raise the center of gravity, and you'll have to watch clearance at the fan shroud. If you're using a transfer case drop, the body lift will make your shifters even shorter.

If you don't want to modify the fenders, do the BL. The TJ flares aren't hard to do.[addsig]

 

[Shane]

1065824

Thanks, i'll look to buy some flares soon as i get my engine fixed ;-)[addsig]

 

[Snitty]

1065851

does the TJ tailhousing bolt right up to the YJ Tcase? I can probably find a housing... after that, i'll just modify my stock parts[addsig]

 

[Bounty__Hunter]

1065855

I haven't checked for sure, but I'm banking on the fact that it bolts right up. DC changed the tailshaft housing style, but I can't imagine them changing the main NP231 case to where both housings would not bolt up.[addsig]

 

[Snitty]

1065892

do you know what the housing is made of... is it something that could be cut and welded to be shorter... if it is aluminum, thats fine, if its cast, which i'm guessing, that would be a problem, if we're talking steel, then we're alright[addsig]

 

[Bounty__Hunter]

1065992

It's aluminum. I wouldn't modify it when you can just bolt up a TJ tailshaft housing.[addsig]

 

[Snitty]

1066016

threy are scarce and i am broke[addsig]