Calgary Jeep Association

4x4 Related Groups => Tech Talk => Topic started by: AV.NINE on January 13, 2008, 11:26:10 PM

Title: 36-37" Tires, what gearing is right?
Post by: AV.NINE on January 13, 2008, 11:26:10 PM
Just curious, Im running 36"s (on my 99 tj) now and my 5th gear is absolutly useless. I have 4.10's in it right now.

I cant decide what size tires i want to run, but if anyone runs 36's or 37's on their TJ, what gears do you have? and how well does your 5th gear hold up on the highway?
Title: Re: 36-37" Tires, what gearing is right?
Post by: Tribal Jeep on January 14, 2008, 12:00:31 AM
Here is a gear table, although I dont know much about the ratio's and how 5th gear will be affected..

http://www.4lo.com/calc/geartable.htm

just posted this as well to Immortals question.

**even with 31's my fifth gear is useless. designed more for Saskatchewan drivers im thinkin.
Title: Re: 36-37" Tires, what gearing is right?
Post by: calltrex on January 14, 2008, 12:02:07 AM
5.13 for sure
Title: Re: 36-37" Tires, what gearing is right?
Post by: BlackYJ on January 14, 2008, 07:15:38 AM
At least 4.88s
Title: Re: 36-37" Tires, what gearing is right?
Post by: AV.NINE on January 14, 2008, 08:16:37 AM
5.13 for sure

Your on 37's? is that what your running?

Tom, you must have some input here? I think your running 5.13's, how does your 5th hold up?
Title: Re: 36-37" Tires, what gearing is right?
Post by: calltrex on January 14, 2008, 09:16:55 AM
ya i got 37 iroks
Title: Re: 36-37" Tires, what gearing is right?
Post by: AV.NINE on January 14, 2008, 09:22:14 AM
ya i got 37 iroks

5th gear is fine for you on the highway?
Title: Re: 36-37" Tires, what gearing is right?
Post by: BlackYJ on January 14, 2008, 10:41:52 AM
He has an auto
Title: Re: 36-37" Tires, what gearing is right?
Post by: Spinalguy on January 14, 2008, 12:12:35 PM
Your on 37's? is that what your running?

Tom, you must have some input here? I think your running 5.13's, how does your 5th hold up?
i have 5.13 and 5 speed.
5th gear works well on the highway 8)
Title: Re: 36-37" Tires, what gearing is right?
Post by: cLAY on January 14, 2008, 11:43:10 PM
5.38s, auto, 36" IROKS, gets into OD fine but I would go lower if I could. Then again my '89 4.0 probably doesn't have as much umph as you newer TJ guys.
Title: Re: 36-37" Tires, what gearing is right?
Post by: cablesmurf on January 15, 2008, 11:24:38 AM
I'm running 4:56's w/ 31's (auto)...so in relation, I woud say minimum 4:88's with a 5 Speed or 5:13's with an auto.
Title: Re: 36-37" Tires, what gearing is right?
Post by: Joel on January 15, 2008, 11:41:26 AM
I woud say minimum 4:88's with a 5 Speed or 5:13's with an auto.

Go with the lowest gear you can find (5.13) and be done with it...don't be like me who did it twice (4.88->5.13) cause it was so much fun swapping out gears.  :'(
Title: Re: 36-37" Tires, what gearing is right?
Post by: BlackYJ on January 15, 2008, 12:37:43 PM
If you still have a D30 front you will be limited to 4.88s
Title: Re: 36-37" Tires, what gearing is right?
Post by: AV.NINE on January 15, 2008, 12:44:19 PM
still on the hunt for rubi 44's. I have 2 sets lined up. Just gotta choose which ones. But I think the 1 has 4.88's and the other has 5.13's.
Title: Re: 36-37" Tires, what gearing is right?
Post by: Tribal Jeep on January 15, 2008, 01:39:09 PM
let me know which one you dont get as i may be interested in picking up the later..