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Old 01-21-2011, 05:40 PM   #1
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should i re-gear my 4:56's?

i currently have the dana 35. I plan on sometime going to the 8.8 or dana 44. I will put an ARB locker in it when i do the swap. I have a 4" lift with 33" tires and am running 4:56 gearing. Now, when i do the axle swap, i would like to run 35" tires. Would the current 4:56's work with the larger tires or should i re-gear to something else?

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Old 01-21-2011, 06:23 PM   #2
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what engine/trans?

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Old 01-21-2011, 06:27 PM   #3
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I don't think your gears you have in your D35 will crossover into the D44 or F8.8.. You will still have to buy 4.56's for your rear again
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Old 01-21-2011, 06:28 PM   #4
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its a 97 4L 5 speed.
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Old 01-21-2011, 06:31 PM   #5
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Originally Posted by XJ Knight View Post
I don't think your gears you have in your D35 will crossover into the D44 or F8.8.. You will still have to buy 4.56's for your rear again
I know the gears wouldnt work. I am wanting to know if 4:56 would work with the bigger tire. I already have 4:56 now. If they work with the bigger tire then i wouldnt have to replace the front. Thats why im asking if they will work with the 35" tires. If not then i would have to change out the front also.
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Old 01-21-2011, 06:41 PM   #6
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With a standard tranny 4.56 are fine
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Old 01-21-2011, 08:40 PM   #7
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I agree 4.56 would be fine with 35s and a 5 speed. 4.88 might be a little better but not worth the extra money for the front swap IMO.
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Old 01-21-2011, 09:24 PM   #8
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I run 4.56 gears. The previous owner of my rig ran 35's. He said it was fine.
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Old 01-22-2011, 09:53 AM   #9
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Sweet! I guess when that time comes to change out the rear end I will stick with the 4:56. Thanks for the info guys!
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Old 01-22-2011, 10:36 AM   #10
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Go to www.grimmjeeper.com/gears.HTML and play with the gear calculator. You can compare the gears on paper and see what difference they make. It has all the jeep components built in.
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Old 01-22-2011, 10:43 AM   #11
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If you have a D35 under the back, you should have a D30 up front. Do you think the D30 will hold up to the 35's? Even though you re-geared I don't know if they will be strong enough to hold up if you wheel alot.
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Old 01-22-2011, 12:14 PM   #12
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The D30 holds up fine to 35" tire and a locker, within reason. With upgraded alloy axle shafts, it will hold up to nearly anything you can throw at it so long as you stay with nothing bigger than 35" tires.

Regarding regearing from 4.56 to 4.88, that depends on your $$$ situation. You are already having to regear the rear axle. If another $500 or so to regear the front axle too is not a big deal, regearing both to 4.88 would be a very good thing to do. 4.88 with the 5-speed and 35" tires is the ideal ratio for both highway and offroad use. I had that combination for years and it was really sweet both on the highway and offroad. 4.56 "works" for 35" tires but 4.88 is a better all-around ratio for that large and heavy of a tire.
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Old 01-22-2011, 12:20 PM   #13
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As Jerry stated 4.88's would be better. I ran 35's with 4.56, and it was fine for me but the jeep was not usually a daily driver.

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