2012 2DR with teraflex 4" lift and double carden D/S front and back - JKowners.com : Jeep Wrangler JK Forum
 
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post #1 of 5 Old 02-21-2017, 02:02 PM Thread Starter
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2012 2DR with teraflex 4" lift and double carden D/S front and back

I just bought myself a 2012 2DR JK with a 6spd manual like the title states and came complete with a teraflex 4" lift with flex arms. I noticed that the jeep also has double carden driveshafts front and back. I have been going over everything making sure things are right and well maintained. The rear pinion angle was adjusted as per teraflex instructions parallel to the drive shaft angle. I come from a pretty good mechanical background and just don't see how this is correct.

I am not sure how much lift was actually achieved but I will measure when I get back from out of town. My big concerns is the reading I have been doing about front shaft failures and breakage of the transfer case. I don't plan to wheel it more than 4 or 5 times a year on 2-3 rated trails. I do want a nice driving and reliable performing jeep.

I can take more pictures of driveshaft angles once I am home thursday. I also have some time scheduled at a friends alignment shop to check caster soon.
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post #2 of 5 Old 02-21-2017, 04:16 PM
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Originally Posted by DRP View Post
I just bought myself a 2012 2DR JK with a 6spd manual like the title states and came complete with a teraflex 4" lift with flex arms. I noticed that the jeep also has double carden driveshafts front and back. I have been going over everything making sure things are right and well maintained. The rear pinion angle was adjusted as per teraflex instructions parallel to the drive shaft angle. I come from a pretty good mechanical background and just don't see how this is correct.

I am not sure how much lift was actually achieved but I will measure when I get back from out of town. My big concerns is the reading I have been doing about front shaft failures and breakage of the transfer case. I don't plan to wheel it more than 4 or 5 times a year on 2-3 rated trails. I do want a nice driving and reliable performing jeep.

I can take more pictures of driveshaft angles once I am home thursday. I also have some time scheduled at a friends alignment shop to check caster soon.
I maybe am not understanding what you don't "see how it's correct' but, by-and-large, yep; if you are referencing a DC driveshaft that constant velocity joint goes up by the transfer case and the single u-joint down at pinion side on axle. That needs to be as straight as possible and would be same angle as pinion. There are agftermarket xfer cases as well as braces for the transfer case from Rockslide Engineering ( Impulse off road) available tho your usage doesn't sound like it will test the OEM transfer case that much.
Don't confuse angles on non-constant velocity shafts with Dual Cardons...


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post #3 of 5 Old 02-21-2017, 05:17 PM
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Front +2 rear -2 are the numbers i use.


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post #4 of 5 Old 02-21-2017, 08:58 PM Thread Starter
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Yes, I have done a lot of reading and now understand that a typical singe u-joint per end driveshafts are set to the standard -1 to +1* depending on transmission output angle.

My question is can the pinion get proper lubrication with the pinion parallel to the driveshaft. I know Teraflex suggest in the lifts instructions to line up the pinion and driveshafts so it must not be that much of an issue.


The rear driveshaft is pretty easy. Now I am moving onto and worrying about the DC front shaft, from what I understand the whole drivetrain is tilted pretty far down from the factory putting the front yoke at an upward angle naturally.

2012 Gecko Green JK 6MT with 4" terflex flex arm kit, JCR Front/rear/tire rack, warn 8K, 35s on procomp wheels

2010 Deep Water Blue JKUS 5AT with 2.5" teraflex kit, flat fenders, 33s and rubicon wheels
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post #5 of 5 Old 02-21-2017, 09:13 PM
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It will be getting plenty of oil. The ring gear will be spraying oil all over the place once it is moving.

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