Rock Crawler lift

[xman4602]

After everything I've read I'm starting to regret my choice but I made my bed so now I just have to lie in it. That being said I want to get the install right before it hits the pavement.


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[xman4602]

Found it! Drtyrat30 has it posted here:

http://wayalife.com/showthread.php?37849-Rock-Krawler-3-5-Flex-Install-Issues/page2

See post #11.

I found that thread! I need a jig like that! I certainly miss being a machinist on days like this. I used to have all the tools and materials readily available to make this jig! Doh!


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[xman4602]

The angle should be the same on both the pinion and drive shaft. It will be different on every Jeep as a 2-door will be steeper than a 4-door and the amount of lift will cause it to vary as well. This is why I say that it's silly for anyone to suggest that there's some kind of magical starting measurement. The ultimate length of your control arms depends entirely on your drive shaft and pinion being in line.

What would you say the tolerance is on the pinion angle? I've got it within 2* - 2.5* but have no more adjustment left.

 

[wayoflife]

What would you say the tolerance is on the pinion angle? I've got it within 2* - 2.5* but have no more adjustment left.

With a factory drive shaft, you would have been fine without making any adjustment. If you're running an aftermarket shaft, 2°-2.5° will more than likely give you driveline vibrations especially on decel.

 

[xman4602]

With a factory drive shaft, you would have been fine without making any adjustment. If you're running an aftermarket shaft, 2°-2.5° will more than likely give you driveline vibrations especially on decel.

I should be good then. Running stock DS.


“Though no one can go back and make a brand new start, anyone can start from now and make a brand new ending.”

 

[wayoflife]

I should be good then. Running stock DS.

If you have a 2-door, you'll want a new rear drive shaft sooner than later. If you have a 4-door, yes, you should be good.

 

[xman4602]

If you have a 2-door, you'll want a new rear drive shaft sooner than later. If you have a 4-door, yes, you should be good.

This one is a 4 door build. [emoji1303]


“Though no one can go back and make a brand new start, anyone can start from now and make a brand new ending.”

 

[xman4602]

Pinion angle is waaaaaaay off on my 2 door! Eek now I'll have to go back and redo that one. [emoji41][emoji857]


“Though no one can go back and make a brand new start, anyone can start from now and make a brand new ending.”

 

[wayoflife]

Pinion angle is waaaaaaay off on my 2 door! Eek now I'll have to go back and redo that one. [emoji41][emoji857]

Unless you're running a u-joint style double cardan shaft, it won't really make a difference. If you're lifted 3" or more, the CV boots on the Rzeppa joints will wear out sooner than later and that will leave you with fried bearings.

 

[xman4602]

Unless you're running a u-joint style double cardan shaft, it won't really make a difference. If you're lifted 3" or more, the CV boots on the Rzeppa joints will wear out sooner than later and that will leave you with fried bearings.

Sounds like good excuses for upgrades.


“Though no one can go back and make a brand new start, anyone can start from now and make a brand new ending.”

 

[Shoe]

Just a heads up

I had a rear joint collar back out , it only had 4 hours of off-road driving on it. All the set screws were not tight. PIA to tighten the lock nuts, special tool to tighten the collar and special 000 grease at $15 for 3oz that you can only get at RK. PIA ! But I do like ride.

 

[xman4602]

I had a rear joint collar back out , it only had 4 hours of off-road driving on it. All the set screws were not tight. PIA to tighten the lock nuts, special tool to tighten the collar and special 000 grease at $15 for 3oz that you can only get at RK. PIA ! But I do like ride.

Yes this is definitely a pia. I ended up taking the new build down to an off-road 4x4 shop and having them do the alignment and tighten all the jam nuts. Was not confident that I had them even close to tight enough.


“Though no one can go back and make a brand new start, anyone can start from now and make a brand new ending.”