Im wanting to go with a 3"Teraflex on my JK and run 35s,do I need to worry about driveshafts?

 

I see that you have a 4dr and from what I have seen and read on this forum it shouldn't be an issue, but its something that I would consider upgrading in the future.

Hope this helps and good luck with your JK project

BTW, nice choice on the lift kit

 

I know this is a bit of a hijack, but it can help too, but ive searched all around the forum and havent found a straight forward answer. if its a auto 2door how much lift max before worrying about shafts? a 6spd 2door how much? an auto 4dr? and 6spd 4dr? thanks.

 

I would agree with Jayray… and if memory serves me there are a few people running a 3" lift with stock drive shafts on the forum...

For my part… I am installing a 3" TeraFlex LA kit, on my 2dr auto, I decided to go ahead and replace the both drive shafts with double cardin U-joint style drive shafts... mainly because I would try to get most everything done while I had the jeep torn apart

For a 2 Door you will want to think about at least a rear drive shaft if you get up to 3 or more inches of lift, but WoL has a better explanation in his post…

MODIFIED TECH FAQ - Answers to the Questions Every Newbie Has

 

This thread should help, too: https://www.jk-forum.com/forums/modified-jk-tech-2/3-lift-plus-35s-%3D-driveline-issues-57699/

 

I have a 4 door w/ 4" of lift and I'm having to swap shafts and install adjustable control arms. with a 3" long arm you will have to change out shafts in the near future as well, being that articulation has as much to do with over stressing U-joints on OE shafts as your lift. Any way you look at it, if you install a lift (any size) and plan to off-road you will need to replace your OE shafts. Shorter lifts just prolong the wearing prosess not eliminate it. Best of luck in building up your Jeep and have fun doing it!!!

 

There is no definite Yes or No answer to needing driveshafts. Too many variables. Auto vs manual, 2door vs 4door, actual lift height, disconnected or not, longer travel shocks, axle centered or offset, mostly street and light offroad vs all your time spent at max articulation in the rocks, specific components in the lift, etc, etc, etc.

So, start with how much lift those 3" TF coils are going to give. (from lots of previous posts, and several from the TF reps on this forum, plan on somewhere over 4" on a 4door!) With a manual, you don't need to worry about the boot contacting the tranny. With an auto, boot/tranny contact is a definite concern. With either, you will want to keep an eye on the tcase end of both shafts, as the steep angles will pinch those joints, eventually wearing through the boot and spitting grease.

 

2 door or 4 door?

You will need a new front shaft within 5-10k miles regardless as they are the same length. The angle is too great for the boot to last in the short front shaft, but the rear in a 4 door is longer and will be fine for quite a while.

 

I have a Tera 4 on my 4drauto with no problems for a year. Then tore the boot of the front shaft.

 

Well said. Can't agree any more than this.

I've seen people report drive shaft tears with 2.5" suspensions and I have seen people with 4" suspension kits with no drive shaft problems.

My advice: Stay connected, buy proper and full suspension kits to compensate for stock-like geometry.