Lifting and modifying the YJ...

[USMC 0369]

new quick question:

With my HP D30 up front, should I be concerned about the pinion angle? Is it 'safe' to shim the front axle?

[Davisrats]

turning the pinion will also turn the caster. This will make harder to keep on the road. Unless you cut the knuckles loose from the housing, get the desired pinion angle, rest the spring pads and then weld the knuckles back with the correct caster.

[USMC 0369]

turning the pinion will also turn the caster. This will make harder to keep on the road. Unless you cut the knuckles loose from the housing, get the desired pinion angle, rest the spring pads and then weld the knuckles back with the correct caster.

Ummmm.... I'm gonna leave it alone then.

[paulhead]

new quick question:

With my HP D30 up front, should I be concerned about the pinion angle? Is it 'safe' to shim the front axle?

I did'nt worry 'bout the front when I did mine. Now if you lock the front, you may have issues.

[USMC 0369]

That answered my next question. Thanks.

Okay, today he sat down on his rubber and I tried to get everything lined up for marking and welding.

In these two comparison pictures, I'm pretty happy so far.
[CENTER][SIZED]http://images33.fotki.com/v1073/photos/9/9459/4116941/PC290023-vi.jpg[/SIZED][SIZED]http://images34.fotki.com/v1081/photos/9/9459/4116941/YJLift011-vi.jpg[/SIZED][/CENTER]

I do still have a couple of questions:

First: When measuring the lateral placement of the spring pads... I measured from the outer edge of the axle (brake backing plate) to the spring pad. I made the distance equal on both sides [approx. 5-7/8"]. This seemed the way to go in my mind, until I noticed that this puts the axle yoke slightly off to the driver side of the T-case yoke. Normal? Suggestions?

Second: If you know please chime in. I have a detroit locker with 4.88 gears on it, can I put a 4.10 set on that locker or will I have to buy a new one? I think the stock D35's break is at 3.31(-)/3.55(+)...but I'm not sure. If that is the case, I think the locker should be fine with 4.10 on it right?

My brain hurts.

Gnite.

[pdw]

I did'nt worry 'bout the front when I did mine. Now if you lock the front, you may have issues.

How and why? If he is simply lifting the YJ, not changing anything else, why would a "lunchbox" locker suddenly change things?
I have been running a R.E. 4.5" lift with a Detroit in the rear and an Aussie locker with Alloy USA axles up front for about 3-4 years and have NEVER had any issues!

Now, if he shimmed the front axle for whatever reason or changed the castor angle, then I can see handling issues. But, simply adding a locker, that comment doesn't make sense to me.

[paulhead]

How and why? If he is simply lifting the YJ, not changing anything else, why would a "lunchbox" locker suddenly change things?
I have been running a R.E. 4.5" lift with a Detroit in the rear and an Aussie locker with Alloy USA axles up front for about 3-4 years and have NEVER had any issues!

Now, if he shimmed the front axle for whatever reason or changed the castor angle, then I can see handling issues. But, simply adding a locker, that comment doesn't make sense to me.

When I thru a lockright in my front I started getting vibes at around 55 mph. The locker was working fine off and on road but being in there it would engage at least one axle at all times therefore spinning the driveshaft on the road. Don't know if it was the pinion angle, driveshaft outta' balance, bad pinion bearings or a combination of things. Thats why I stated that he MAY have issues if he thinks there might be angles too outta' wack. Just jeeps being a little different each, 15% of the time I hear of people having issues after a lift. Did'nt mean to worry him though since there's only a slight chance of something popping up, like it has'nt already

[USMC 0369]

Guys, I'm searching for an Aussie locker for the front D30. heard nothing but good things about them. Less noise than a lock right, awesome warranty, and tough as hell.

[pdw]

When I thru a lockright in my front I started getting vibes at around 55 mph. The locker was working fine off and on road but being in there it would engage at least one axle at all times therefore spinning the driveshaft on the road. Don't know if it was the pinion angle, driveshaft outta' balance, bad pinion bearings or a combination of things. Thats why I stated that he MAY have issues if he thinks there might be angles too outta' wack. Just jeeps being a little different each, 15% of the time I hear of people having issues after a lift. Did'nt mean to worry him though since there's only a slight chance of something popping up, like it has'nt already [

OK, that makes more sense to me. I have used a Lock-Rite in the rear of my old Blazer and it would unlock itself with a loud bang every so often and it was a pain to install!
From what you said, I would guess bad u-joints or out-of-balance drive shaft-or both!
I have the situation where my front driveshaft always turns, but none of those issues. Perhaps because I changed my u-joints shortly after purchasing the Jeep, but I am surprised at how long the front drive shaft has survived.

The Aussie locker has never presented me with any of those types of problems---it actually lives up to its claims. The only issue that I have with the Aussie locker is that I can no longer flat tow my Jeep.....That is a differant issue all together.

Every change that I have made to my Jeep has always had unintended results to go along with the results that I intended. It's amazing to me that two indentical vehicles built at the same plant, by the same people, during the same shift will have differant issues. It's almost as if they had a personality of sorts.

[paulhead]

Guys, I'm searching for an Aussie locker for the front D30. heard nothing but good things about them. Less noise than a lock right, awesome warranty, and tough as hell.

My lockright is fairly quiet and very dependable, heard nothing but good about Aussies,
yeah, stay away from the Detriot EZ locker, POS.

[cbrazor1]

i also have the lockright never had a problem ,a little noise ,a little vibration, at 55 i think its the drive shaft . i still flat tow with no prob. when i was runing the trutrac up front i had the same problem a small amount of vibration at 55

[USMC 0369]

Maybe I'm missing something...

My driveshaft shouldn't be spinning at 55 mph. If my hubs aren't locked (vacuum) and I'm not in 4wd then there is nothing turning the front driveshaft at that speed. (?)
Will putting in a locker do this? I don't see how but then I've never run a locker before.

[cbrazor1]

it will still spin even with the vacume disconnect with the spyder gears it didnt turn but with a locker it will , but the vibration is very slight shouldnt be a problem

[paulhead]

Guys, I'm searching for an Aussie locker for the front D30. heard nothing but good things about them. Less noise than a lock right, awesome warranty, and tough as hell.

depending on your budget I'd just get a new one
http://www.jeepsunlimited.com/forums...d.php?t=868776

[USMC 0369]

depending on your budget I'd just get a new one
http://www.jeepsunlimited.com/forums...d.php?t=868776

I did plan to get a new one, just like to shop around. Thanks for the link!