Are 40's to big - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ General Discussion Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 10-18-2012, 02:06 AM   #1
Jeeper
 
Boobicon's Avatar
 
Join Date: Jul 2012
Location: Jacksonville, fl
Posts: 161
Are 40's to big

I've had my 8" lift for about 7 years I've only run 35's but Now I feel the need to go BiG . Should I just go with 38's ?

__________________
God Bless Mobile One
Boobicon is offline   Quote Quick Reply
Old 10-18-2012, 02:28 AM   #2
Jeeper
 
lapis_blue's Avatar
 
Join Date: Sep 2012
Posts: 210
Images: 1
I was under the impression that size doesn't matter? Lol j/k it's you jeep! Just hope it's not a DD. kind of wonder were u plan on using 40's to off road? Or is it just for looks?

lapis_blue is offline   Quote Quick Reply
Old 10-18-2012, 04:50 AM   #3
Jeeper
 
thewampus97tj's Avatar
 
Join Date: Jul 2012
Location: Goodyear AZ.
Posts: 220
On Stock axles and stock wheel base? I wouldn't. My Chevy has 39.5's and one tons and it works great but no wayI would run that big of a tire on my jeep without spending a couple of grand and a new dd.
thewampus97tj is offline   Quote Quick Reply
Old 10-18-2012, 06:33 AM   #4
Jeeper
 
ggross's Avatar
 
Join Date: Nov 2010
Location: saginaw, mi
Posts: 231
I have an 8 inch lift on mine run 37's all the time and it is my dd. I also have a dana 44. Front and rear. Never had a problem. And I use it off road as much as I can
ggross is offline   Quote Quick Reply
Old 10-18-2012, 07:12 AM   #5
Jeeper
 
Irongrave's Avatar
 
Join Date: Apr 2011
Location: Erie, PA
Posts: 2,800
Send a message via AIM to Irongrave
with stock axles anything over a 35 is running a risk of breaking parts.
__________________
4421
Irongrave is offline   Quote Quick Reply
Old 10-18-2012, 07:18 AM   #6
Jeeper
 
Imped's Avatar
 
Join Date: Jan 2011
Location: Indy
Posts: 3,269
Must see pics of this silliness.
__________________
Daily Driver Rock Rig
IndyORV
Imped is offline   Quote Quick Reply
Old 10-18-2012, 08:30 AM   #7
Jeeper
 
Mudweiser's Avatar
 
Join Date: May 2006
Location: Panama City Florida
Posts: 359
Send a message via AIM to Mudweiser Send a message via MSN to Mudweiser Send a message via Yahoo to Mudweiser
I ran 38s for quite a while on my 01. Beat it to hell n back in the mud pits. Of course you are more prone to breakage, but hell if you dont break something, would be a pretty boring hobby. Some folks are out to build the "best" rig humanly possible, and never break nothing... personally i prefer just upgrading as i blow stuff up. If you want to run 40s, knock yourself out. If its too big or too loud...your too dam old.
__________________
01 TJ. Dana 30/44 4:88's, 4.0 5 speed, 38.5x15 Boggers on 15x10 Streetlocks, CAI, B&M short throw, Neoprene Covers, 4" RC, 3" BL, too much to list and building. >..<
Mudweiser is offline   Quote Quick Reply
Old 10-18-2012, 09:19 AM   #8
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 31,368
Images: 2
The front Dana 30 is not up to anything larger than 35" tires, it will start wearing out things like ball joints with even 37" tires. And if your rear axle Boobicon is a Dana 35, even a 35" tire is too big for it. For a Dana 44 with aftermarket alloy shafts, a 37" is pushing it.
__________________
When you have a choice, buy American.

Jerry Bransford is online now   Quote Quick Reply
Old 10-18-2012, 01:09 PM   #9
Jeeper
 
Boobicon's Avatar
 
Join Date: Jul 2012
Location: Jacksonville, fl
Posts: 161
I have a rubi so 44's front and rear w/ lockers it's already been re-geared , tuned, banks power pack. I live in fl so I don't really have to many fun trails so I'm mainly in mud/sand. This is my dd I have over 120k lifted miles on it and it's definitely not for show.
__________________
God Bless Mobile One
Boobicon is offline   Quote Quick Reply
Old 10-18-2012, 01:16 PM   #10
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 31,368
Images: 2
Your front D44 is more Dana 30 than Dana 44. The only thing in a Rubicon's front Dana 44 that is truly Dana 44 is its center pumpkin, ring & pinion gears, and inner axle shaft. EVERYTHING else is pure Dana 30... knuckles, axle tubes, inner/outer C's, outer stub shaft, ball joints, brakes, u-joints, steering, etc. And what is it about the Rubicon's front Dana 44 that doesn't hold up to 37" and bigger tires? All its Dana 30 components.... especially its ball joints.

I'm running a Rubicon with a beefed up front D44 including Superior Axle hardened alloy axle shafts, Warn "big" hubs, and CTM u-joints. And I'm still limiting its tire size to 35".
__________________
When you have a choice, buy American.

Jerry Bransford is online now   Quote Quick Reply
Old 10-18-2012, 01:26 PM   #11
Jeeper
 
Boobicon's Avatar
 
Join Date: Jul 2012
Location: Jacksonville, fl
Posts: 161
Quote:
Originally Posted by Jerry Bransford View Post
Your front D44 is more Dana 30 than Dana 44. The only thing in a Rubicon's front Dana 44 that is truly Dana 44 is its center pumpkin, ring & pinion gears, and inner axle shaft. EVERYTHING else is pure Dana 30... knuckles, axle tubes, inner/outer C's, outer stub shaft, ball joints, brakes, u-joints, steering, etc. And what is it about the Rubicon's front Dana 44 that doesn't hold up to 37" and bigger tires? All its Dana 30 components.... especially its ball joints.

I'm running a Rubicon with a beefed up front D44 including Superior Axle hardened alloy axle shafts, Warn "big" hubs, and CTM u-joints. And I'm still limiting its tire size to 35".
Oooo did not know that .. Limited in the fact that it'll shatter everything under there or just not a fun ride ?
__________________
God Bless Mobile One
Boobicon is offline   Quote Quick Reply
Old 10-18-2012, 01:30 PM   #12
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 31,368
Images: 2
Limited to 35" tires so I won't have to waste my time replacing prematurely worn components like ball joints. Not to mention your steering and brakes are nowhere (!!!) close to be able to handle tires larger than 35". The TJ's brakes are barely adequate for 35" tires, let alone anything bigger. Heck the steering (drag link and tie rod) should be replaced (Currie makes a good kit) for even for 35" tires.
__________________
When you have a choice, buy American.

Jerry Bransford is online now   Quote Quick Reply
Old 10-18-2012, 01:41 PM   #13
Jeeper
 
Boobicon's Avatar
 
Join Date: Jul 2012
Location: Jacksonville, fl
Posts: 161
Already replace all of my steering , got hit by a drunk driver.
I already have to replace bushing quite frequently. So the only thing I need is big breaks, spare bushing, and chromoly axels
__________________
God Bless Mobile One
Boobicon is offline   Quote Quick Reply
Old 10-18-2012, 01:44 PM   #14
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 31,368
Images: 2
Bushing? What bushing? I'm talking ball joints. Chromolly axles, as I am running, won't prevent accelerated wear to the D30 components as mentioned above. Steering? What did you install?

Edit: I hate to sound like a spoil-sport on this but many new Jeepers see big 40" tires on Jeeps and want the same for theirs... but they have no idea what went into getting those Jeeps built up sufficiently with new stronger axles, etc. so they could successfully run big tires like those. A Rubicon with its OE f/r Dana 44 axles is really only good up to 35" tires. Bigger than that and you have to swap in stronger axles if you want to keep them reliable so they can hold together on the level of trails that require that big of a tire. Really.
__________________
When you have a choice, buy American.

Jerry Bransford is online now   Quote Quick Reply
Old 10-18-2012, 01:53 PM   #15
Jeeper
 
Boobicon's Avatar
 
Join Date: Jul 2012
Location: Jacksonville, fl
Posts: 161
Sorry ment the joints I have curries Currectlync Heavy-Duty Tie Rod System. It's plenty beefy weighs almost as much as my bumper. Everything has eccelerated wear I can't get away from that but I don't want to break everything just driving down the road.
__________________
God Bless Mobile One
Boobicon is offline   Quote Quick Reply
Old 10-18-2012, 01:57 PM   #16
Jeeper
 
Boobicon's Avatar
 
Join Date: Jul 2012
Location: Jacksonville, fl
Posts: 161
Only thing I'm missing is the steering stabilizer
__________________
God Bless Mobile One
Boobicon is offline   Quote Quick Reply
Old 10-18-2012, 01:58 PM   #17
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 31,368
Images: 2
I run Currie's steering too but I wouldn't for 40" tires. Heck I have bent my Currie tie rod several times just with my 35" tires... though it was designed to bend just before something more critical broke first.
__________________
When you have a choice, buy American.

Jerry Bransford is online now   Quote Quick Reply
Old 10-18-2012, 02:01 PM   #18
Jeeper
 
Boobicon's Avatar
 
Join Date: Jul 2012
Location: Jacksonville, fl
Posts: 161
I'm sure your right about the 40's you obviously know what your talking about. How about 37"s ? It looks like you like to play in the rocks I don't need anything that strong no rocks around here just mud and a few flat trails
__________________
God Bless Mobile One
Boobicon is offline   Quote Quick Reply
Old 10-18-2012, 02:07 PM   #19
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 31,368
Images: 2
The only size I can in good conscience recommend is 35" though I know some who take it real easy don't have major problems with 37". You will really need to regear your axles though. I dunno what transmission you have but if you have a stick shift, I'd go with the lowest ratio available for the Rubicon axles which is 5.13.
__________________
When you have a choice, buy American.

Jerry Bransford is online now   Quote Quick Reply
Old 10-18-2012, 02:12 PM   #20
Jeeper
 
Boobicon's Avatar
 
Join Date: Jul 2012
Location: Jacksonville, fl
Posts: 161
Running 4.88 with an automatic i can still do 80 in overdrive Thanks for the advice, I think you have successfully scared me out of running anything over 35
__________________
God Bless Mobile One
Boobicon is offline   Quote Quick Reply
Old 10-18-2012, 02:43 PM   #21
Jeeper
 
Dextreme's Avatar
 
Join Date: Oct 2011
Location: Oregon City, OR
Posts: 3,498
Images: 1
You might contact this rdelling guy about his TJ w/40's to see what problems he has had or get his considerations.

DD LJ's and TJ's on 40's! Pics and Specs...Please!!! - JeepsUnlimited.com Forums
__________________
'99 Chilli Pepper TJ Wrangler "Mistress"
33x12.5 DuraTracs
Zone 4.25"
Dextreme is offline   Quote Quick Reply
Old 10-19-2012, 01:45 AM   #22
Jeeper
 
Boobicon's Avatar
 
Join Date: Jul 2012
Location: Jacksonville, fl
Posts: 161
Just checked out the forum those things are crazy. Hydraulics steering, Dana 60's, high lined fenders or none at all, stretched, atlas transfer, 3spd trans... Looks like this wont be happening anytime soon. Guess I should start looking for a totaled dodge to steel parts from
Thanks for the link dextreme
__________________
God Bless Mobile One
Boobicon is offline   Quote Quick Reply
Old 10-19-2012, 07:31 AM   #23
Jeeper
 
Imped's Avatar
 
Join Date: Jan 2011
Location: Indy
Posts: 3,269
Quote:
Originally Posted by Boobicon View Post
Just checked out the forum those things are crazy. Hydraulics steering, Dana 60's, high lined fenders or none at all, stretched, atlas transfer, 3spd trans... Looks like this wont be happening anytime soon. Guess I should start looking for a totaled dodge to steel parts from
Thanks for the link dextreme
Yeah.....

That's what it takes to run tires that big.
__________________
Daily Driver Rock Rig
IndyORV
Imped is offline   Quote Quick Reply
Old 10-19-2012, 08:00 AM   #24
Jeeper
 
offroad cowboy's Avatar
 
Join Date: Oct 2012
Location: Innisfail, Alberta, Canada
Posts: 127
I run 38.5's on my jeep. I have 7 inches of lift. one thing you also have to remember is when you flex your jeep out, will the tires rub on the fenders? mine do sometimes so going with high clearance fenders, dont want to lift any higher. Also like everyone said you will have to upgrade. I run a Waggy 44 with chromo axles and yukon super joints, also a high steer set up with homemade hydo-assit. Rear is rockjock 60. i have also changed my T-case to a Dana 300. Never broke nothing major other than a hub. I have a bubby that runs 43's on his 08 jeep, but same all upgraded. also niether are DD's
offroad cowboy is offline   Quote Quick Reply
Old 10-19-2012, 09:15 AM   #25
Jeeper
 
Boobicon's Avatar
 
Join Date: Jul 2012
Location: Jacksonville, fl
Posts: 161
Quote:
Originally Posted by offroad cowboy View Post
I run 38.5's on my jeep. I have 7 inches of lift. one thing you also have to remember is when you flex your jeep out, will the tires rub on the fenders? mine do sometimes so going with high clearance fenders, dont want to lift any higher. Also like everyone said you will have to upgrade. I run a Waggy 44 with chromo axles and yukon super joints, also a high steer set up with homemade hydo-assit. Rear is rockjock 60. i have also changed my T-case to a Dana 300. Never broke nothing major other than a hub. I have a bubby that runs 43's on his 08 jeep, but same all upgraded. also niether are DD's
Where's the fun if you can't drive it daily !! I didn't spend 30k on it so I.could only take it 3 miles up the road/trail seems pointless.. so I guess its safe to say I won't be running 40s
__________________
God Bless Mobile One
Boobicon is offline   Quote Quick Reply
Old 10-19-2012, 10:42 AM   #26
Jeeper
 
Imped's Avatar
 
Join Date: Jan 2011
Location: Indy
Posts: 3,269
Quote:
Originally Posted by offroad cowboy View Post
I run 38.5's on my jeep. I have 7 inches of lift. one thing you also have to remember is when you flex your jeep out, will the tires rub on the fenders? mine do sometimes so going with high clearance fenders, dont want to lift any higher.
Bump stops.
__________________
Daily Driver Rock Rig
IndyORV
Imped is offline   Quote Quick Reply
Old 10-19-2012, 02:54 PM   #27
Supporting Member

WF Supporting Member
 
Join Date: Dec 2011
Location: Under my Jeep in beautiful upstate N.Y.
Posts: 2,878
Quote:
Originally Posted by Jerry Bransford View Post
The front Dana 30 is not up to anything larger than 35" tires, it will start wearing out things like ball joints with even 37" tires. And if your rear axle Boobicon is a Dana 35, even a 35" tire is too big for it. For a Dana 44 with aftermarket alloy shafts, a 37" is pushing it.
Boobicon
1jeeplvr is offline   Quote Quick Reply
Old 10-19-2012, 03:46 PM   #28
Jeeper
 
UnlimitedLJ04's Avatar
 
Join Date: Aug 2010
Posts: 7,208
Quote:
Originally Posted by Imped View Post
Bump stops.
huh? what?
UnlimitedLJ04 is offline   Quote Quick Reply
Old 10-19-2012, 04:44 PM   #29
Jeeper
 
offroad cowboy's Avatar
 
Join Date: Oct 2012
Location: Innisfail, Alberta, Canada
Posts: 127
Quote:
Originally Posted by Imped View Post
Bump stops.
Still rub alittle with them, might go to hydro ones. want more flex. supension will just need more room and upgrade my crappy shocks.
I can drive mine on the road but dont like to much. I dint build it for the road, thats what my CJ is for.
offroad cowboy is offline   Quote Quick Reply
Old 10-19-2012, 05:11 PM   #30
Jeeper
 
offroad cowboy's Avatar
 
Join Date: Oct 2012
Location: Innisfail, Alberta, Canada
Posts: 127
Quote:
Originally Posted by Boobicon View Post
Where's the fun if you can't drive it daily !! I didn't spend 30k on it so I.could only take it 3 miles up the road/trail seems pointless.. so I guess its safe to say I won't be running 40s
I am not saying you cant run big tires on the road, you can, just make sure you abide with the laws where your at, mudflaps,etc. I just built mine for more offroad use. have friends that run 37's and 38's on the road.

offroad cowboy is offline   Quote Quick Reply
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 10:09 PM.



Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC