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Old 04-13-2014, 06:42 PM   #1
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40"s on your tj?

What kind of lift did you put on your tj to fit 40" tires? Pictures would be awesome!

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Old 04-13-2014, 06:52 PM   #2
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People do a lot of body cutting to fit them

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Old 04-13-2014, 07:08 PM   #3
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That size and weight of 40" tire requires A LOT MORE than just lift! Especially if you want a TRAIL WORTHY rig rather than a poser rig!

Upgraded axle housings/ trussed
Upgraded axle shafts
BRAKES
Ball Joints
Re-Gearing
Drive shaft upgrade F & R
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Old 04-13-2014, 07:36 PM   #4
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I know I'm just concerned with clearance. I'm going with dana 60s and tube fenders.
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Old 04-13-2014, 11:21 PM   #5
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I would seriously look into GenRight lifts. With forties I would definitely stretch my wheelbase out to 100 inches at least. Maybe go Atlas II, beef up every steering component, LIst goes on and on and on.
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Old 04-14-2014, 12:23 AM   #6
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I plan on 40s here with rear COs. Have a 1.25" BL currently. So I'll jack the COs 1" higher (stock height currently) with fully built JkR 44s. And a 98-99" WB stretch.

Curious if anyone on this forum is doing that.
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Old 04-14-2014, 12:31 AM   #7
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Once you go that big the only thing really left that's jeep is whatever is above the frame lol. i.e. tub, engine, tranny...That's about it
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Old 04-14-2014, 12:36 AM   #8
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You should probably be on pirate instead of this forum. While there is a wealth of information here most builds stop at the 35-37" range. You'll find more pics and more build threads over there.
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Old 04-14-2014, 12:37 AM   #9
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Quote:
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You should probably be on pirate instead of this forum. While there is a wealth of information here most builds stop at the 35-37" range. You'll find more pics and more build threads over there.
I am. Just wondered if anyone ventures beyond 33s here. That seems to be the average. Sparked my attention when I read 40s! Yay! Haha

Also. My plan is to still have a jeep that I can dd on 40s with. So no buggy here. Just a comfortable TJ. Guys on pirate like to chop everything up.
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Old 04-14-2014, 12:55 AM   #10
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Quote:
Originally Posted by NYGLT56 View Post
I plan on 40s here with rear COs. Have a 1.25" BL currently. So I'll jack the COs 1" higher (stock height currently) with fully built JkR 44s. And a 98-99" WB stretch.

Curious if anyone on this forum is doing that.
Your going to bend wheel studs on a jkr Dana 44 with 40's if you do any sort of wheeling. You need 5on5.5 bolt pattern at the minimum. I wouldn't run anything over 37's on a 44 with the style of wheeling I do. Just my .02.
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Old 04-14-2014, 01:06 AM   #11
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Your going to bend wheel studs on a jkr Dana 44 with 40's if you do any sort of wheeling. You need 5on5.5 bolt pattern at the minimum. I wouldn't run anything over 37's on a 44 with the style of wheeling I do. Just my .02.
Wheel studs? That's the most random thing I've heard thus far.

JkR44s are a lot stronger than you think...on a light weight TJ. Fully built. 40s are not something to be worried about. After all, there are 4-door jks running that setup. And they have much, much more weight.

I have 37s with fully built JKR44s. And they have no issue turning on my style of wheeling..
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Old 04-14-2014, 07:25 AM   #12
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Quote:
Originally Posted by Dougzin View Post

Your going to bend wheel studs on a jkr Dana 44 with 40's if you do any sort of wheeling. You need 5on5.5 bolt pattern at the minimum. I wouldn't run anything over 37's on a 44 with the style of wheeling I do. Just my .02.
Fyi jk axles are 5 on 5.5.
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Old 04-14-2014, 07:58 AM   #13
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Originally Posted by 98 tj sport View Post
Fyi jk axles are 5 on 5.5.
no, they are 5 on 5.
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Old 04-14-2014, 08:35 AM   #14
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no, they are 5 on 5.
I stand corrected always thought they were. Learn something new everyday. I apologize
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Old 04-14-2014, 08:42 AM   #15
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Locked 44 with 40's =catastrophe
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Old 04-14-2014, 09:43 AM   #16
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Quote:
Originally Posted by DannyBoy91 View Post
I know I'm just concerned with clearance. I'm going with dana 60s and tube fenders.

Tadah!
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Old 04-14-2014, 09:55 AM   #17
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Quote:
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Tadah!
60's and tubes, then if you're going the low cog way then you can get by nicely with just a 4" lift, but you will need hi-lines in front and back and bumstops of course. Thats how I would do it anyway.
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Old 04-14-2014, 10:31 AM   #18
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Locked 44 with 40's =catastrophe
On a jk.

And even then. Many run it successfully. Like this guy.

No doubt in my mind a lighter TJ will have zero issue.
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Old 04-14-2014, 10:43 AM   #19
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one of the guys whose a local in a neighboring club runs a TJ on 38s with no lift. just alot of trimming and streching
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Old 04-14-2014, 01:03 PM   #20
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On a jk.

And even then. Many run it successfully. Like this guy.

No doubt in my mind a lighter TJ will have zero issue.
Yes the TJ is lighter. But no the tires aren't any different. Your asking a lot of a 44 IMO.
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Old 04-14-2014, 02:28 PM   #21
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Ya, gotta keep in mind every 10# at the axle is equivalent to 100 pounds more than the cabin!
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Old 04-14-2014, 02:56 PM   #22
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Yes the TJ is lighter. But no the tires aren't any different. Your asking a lot of a 44 IMO.
JK Rubi44s are not your standard dana 44. These new rubi 44s are so unique that Dana did not want to call them Dana 44. JKs run 37s no problem on built Rubi44s and they are over a thousand pounds heavier then TJs. Also the JKs have almost 100 more HP then the TJ's 4.0. So 40s on a TJ that is lighter and less powerful then a JK is no problem imo.

For the OP: You won't find many people on here that build their rigs to handle 40s, I suggest you head over to Jeepforum or pirate4x4 for a lot more answers, you'll find a lot of build threads over there with people building their TJ for 40s.
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Old 04-14-2014, 03:01 PM   #23
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Heres mine at about 4" of spring lift and 1.25" body lift. Its not done yet but will be in a few weeks.
40x12.5-17 tires
hp king pin dana60 up front
gm 14bolt FF rear
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Old 04-15-2014, 07:20 PM   #24
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Thanks everyone for the help!
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Old 04-15-2014, 10:39 PM   #25
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here is a pic of TJ with 39.5 IROKs…

not mine…

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