looking for comments from people who installed 4.56 gears
#11
JK Junkie
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I'll second this - 5.13s with 35" tires, with an auto trans, is a near-perfect combo. If you have a 6-spd, go higher, like 4.88s for 35"s.
#12
JK Super Freak
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My math shows that if the original tires are say 31.5" then going to a tire that is 35" would be 11% larger.
so 3.73 + 11% = 4.14
4.10 + 11% = 4.55
so why would a person with a 33" or 34" tire want to go 4.88 or higher???
I'm so confused
so 3.73 + 11% = 4.14
4.10 + 11% = 4.55
so why would a person with a 33" or 34" tire want to go 4.88 or higher???
I'm so confused
#13
JK Enthusiast
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I could use help here, too. If you're driving a 6 speed manual, is it as important to get exactly the right gear ratio? Wouldn't getting gears "close enough" do the job because you control the shift point?
#14
JK Junkie
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#15
JK Junkie
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I've spent hours with gear charts trying to decide on the perfect setup. Currie Enterprises has some neat tools on their website if you want to make your own. I'm going with 4.56 gears and 35s. I have the six speed. I don't care if I can't climb the mountains in 6th gear, that is why I have 3rd and 4th and why I ordered the manual. The actual ratios are very close to what you have with stock 4.10 and 32s. I agree the 2.72 transfer ratio can be too high if you are trying to do any rock crawling. I was able to climb Ken's Climb on Fins and Things in Moab with no problem but I think that was the limit. I did stall on a number of ledges. I'm taking care of this with an Atlas 4.3:1 2 speed case. By changing the transfer case I get a crawl ratio lower than a stock Rubi even with the 35 inch tires and still have road ratios that don't have my engine spinning its guts out at 65 mph.
The other reason to stay at 4.56 was the advice I received that the 4.88 pinion for the D30 was getting really small and could be a problem. I guess we have plenty of folks running these. I did not need to.
The other reason to stay at 4.56 was the advice I received that the 4.88 pinion for the D30 was getting really small and could be a problem. I guess we have plenty of folks running these. I did not need to.
I agree with you.
Just want to say that some Jeepers like slow (on road) and powerfull ratio. There is no scientific reason. It's a Jeep thing
Last edited by Yoda; 01-17-2009 at 05:36 AM.