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Liberjeep
 Post subject: Max tire size with Automatic
PostPosted: Sun Apr 25, 2010 4:07 pm 
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Alright so I got 245/70R/16 on atm.. Couple months old and I'll be getting my 3 inch lift soon. What is the MAX tire size I can go without screwing doo doo up. I dont wan't the Libby to be sluggish and I also don't want to get new gearing and doo doo.
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DirtyKK
 Post subject: Re: Max tire size with Automatic
PostPosted: Sun Apr 25, 2010 4:10 pm 
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keep the tires you got or maybe 245/75/16 or 265/70/16, most people would not recommend anything larger without regearing.
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Diggerfreek
 Post subject: Re: Max tire size with Automatic
PostPosted: Sun Apr 25, 2010 5:14 pm 
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DirtyKK wrote:
keep the tires you got or maybe 245/75/16 or 265/70/16, most people would not recommend anything larger without regearing.



X2

With out gears, you are going to burn up the trans if you go larger...

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tjkj2002
 Post subject: Re: Max tire size with Automatic
PostPosted: Sun Apr 25, 2010 9:41 pm 
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Stay stock.

Any tire larger then stock will reduce trans life without regearing.
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stumpjumper_09
 Post subject: Re: Max tire size with Automatic
PostPosted: Sun Apr 25, 2010 11:43 pm 
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tjkj2002 wrote:
Stay stock.

Any tire larger then stock will reduce trans life without regearing.



Not likely, but kinda ironic coming from the largest KJ on the planet... :ROTFL:

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Thanks for throwing me under the bus Evil... Just remember this when you decide to turn yours back in to a... Real Jeep.
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tjkj2002
 Post subject: Re: Max tire size with Automatic
PostPosted: Mon Apr 26, 2010 1:03 am 
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stumpjumper_09 wrote:
tjkj2002 wrote:
Stay stock.

Any tire larger then stock will reduce trans life without regearing.



Not likely, but kinda ironic coming from the largest KJ on the planet... :ROTFL:
Very likely and I regeared,5.13's in my diffs.
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JeepinJarhead03
 Post subject: Re: Max tire size with Automatic
PostPosted: Mon Apr 26, 2010 1:09 am 
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regeared before the sfa too didnt ya?

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Diggerfreek
 Post subject: Re: Max tire size with Automatic
PostPosted: Mon Apr 26, 2010 1:28 am 
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JeepinJarhead03 wrote:
regeared before the sfa too didnt ya?

He was running 4.10's iirc

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jafstl38
 Post subject: Re: Max tire size with Automatic
PostPosted: Mon Apr 26, 2010 1:47 am 
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Ive been toying with the idea of re-gearing mine, still have some issues w/ power almost feels like the KJ has a bad motor w/ only 50k on it!?, whats the best gears to run? 3.73s or 4.10s? I have a Frankenlift premium w/ 245/75/R16s

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DirtyKK
 Post subject: Re: Max tire size with Automatic
PostPosted: Mon Apr 26, 2010 1:56 am 
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3.73 would be a waste of time and money, especially if you ever go bigger. 4.10 would be the way to go.
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Diggerfreek
 Post subject: Re: Max tire size with Automatic
PostPosted: Mon Apr 26, 2010 2:00 am 
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DirtyKK wrote:
3.73 would be a waste of time and money, especially if you ever go bigger. 4.10 would be the way to go.

X2 again :lol:

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2008 KK Liberty Sport NIGHT OPS EDITION + GILLS
OEM & Custom Skids - Factory Tow Package - Rock Lizard Skink Super Sliders
Prototype JBA 4 Inch Lift - JBA UCA's - Flowmaster Super 44 OR - Whacked Resonator
Jet Stage 2 - RL Gecko Basket Rack - Custom Winch Bumper - Recon 10.5K Winch
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stumpjumper_09
 Post subject: Re: Max tire size with Automatic
PostPosted: Mon Apr 26, 2010 2:03 am 
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tjkj2002 wrote:
stumpjumper_09 wrote:
tjkj2002 wrote:
Stay stock.

Any tire larger then stock will reduce trans life without regearing.



Not likely, but kinda ironic coming from the largest KJ on the planet... :ROTFL:
Very likely and I regeared,5.13's in my diffs.



Not likely of keeping stock tires on any Jeep.

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SOLD!!!
2005 Liberty Renegade
STT CustomSTUFF
4" Stump Lift.
JBA UCA's
245/75/16 GOODYEAR DURA TRACS


Thanks for throwing me under the bus Evil... Just remember this when you decide to turn yours back in to a... Real Jeep.
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LibertyGuy
 Post subject: Re: Max tire size with Automatic
PostPosted: Tue Apr 27, 2010 11:35 am 
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Do you need to regear if going from 235/70/16 to 245/70/16?

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tommudd
 Post subject: Re: Max tire size with Automatic
PostPosted: Tue Apr 27, 2010 12:19 pm 
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LibertyGuy wrote:
Do you need to regear if going from 235/70/16 to 245/70/16?



No you'll never even hardly notice the difference :wink:

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jafstl38
 Post subject: Re: Max tire size with Automatic
PostPosted: Wed Apr 28, 2010 2:37 am 
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so my 245/75/R16s are probably doing damage to my tranny since i have stock gears still? :oops:

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04 Rocky mountain KJ (SOLD)
OME Front Kit 790 springs on OME NS131s
skyjacker rear shocks and springs
ARB Deluxe bumper w/ Warn 9500i
Skid plates all under
ARB On-board Air w/ Front & Rear Air Lockers
JBA 4.5 UCA's
Lots O' Lights

"If it ain't broke...it might be after i try this!"
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daspes
 Post subject: Re: Max tire size with Automatic
PostPosted: Wed Apr 28, 2010 11:44 am 
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[quote="tjkj2002"]Stay stock.[quote]


X2, Big tires break stuff!

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Xx_Flip_xX
 Post subject: Re: Max tire size with Automatic
PostPosted: Thu Apr 29, 2010 3:16 pm 
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hold up one sec... my dad bought my jeep brand new and he put 31's on a week later. 10 years and 210k miles im rockin 31's on the original automatic trans and engine and i havn't had a trans flush since 75k.

31's must be good for your trans cause i've heard people say that the trans on the tj's are notorious for going out around 150k.

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tjkj2002
 Post subject: Re: Max tire size with Automatic
PostPosted: Thu Apr 29, 2010 4:26 pm 
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Xx_Flip_xX wrote:
hold up one sec... my dad bought my jeep brand new and he put 31's on a week later. 10 years and 210k miles im rockin 31's on the original automatic trans and engine and i havn't had a trans flush since 75k.

31's must be good for your trans cause i've heard people say that the trans on the tj's are notorious for going out around 150k.

A TJ is worlds different then a KJ and about 700lbs lighter.

The biggest issue is the weight,the total circumference takes it's toll but the overall added weight of bigger tires is the biggest factor.A rule of thumb is for every 1lbs of added rotational weight it's like adding 10lbs of total vehicle weight.It adds up fast.
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