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Old 08-11-2008, 12:45 PM   #1
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Do I need to re-gear?

Greetings everybody. Please forget what appear as truly basic questions, with me being a newie and all.
I have installed 30"s on my otherwise stock '93, 4-banger. I wonder if I need to re-gear the diff to compensate for the larger tires. If affirmative what the new ratio should be? Where do I buy the needed components?

Thank you again folks.

Frank

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Old 08-11-2008, 01:34 PM   #2
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i wouldn't bother, not worth the moneh for just 30" tires. for the money you'd spend you really wouldn't notice a huge difference. spend the money else where.

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Old 08-11-2008, 02:49 PM   #3
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well, i'm in the same boat and looking to go up to a 33" soon, where should i go for gearing? 4cyl 5 speed
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Old 08-11-2008, 03:24 PM   #4
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the problem is a 4 cyl, manual trans already has 4.10 gears. the stock axle can only fit 4.56, and i think an aftermarket company makes something like 4.88 that is supposed to fit.

so if you can go to 4.88 it would be worth while, but for someone only running 30" tires i don't think regearing is worth while.

and you're droppin a grand if you have to pay for install, on a weak axle.
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Old 08-11-2008, 03:28 PM   #5
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to snowman

I went with 456 gears got them from www.4wd.com they were really helpful and they are a top quality. supierior gears is what I went with.. they offer timken bearings with the rebuild kits the rebuild kits are from alloy.
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Old 08-11-2008, 04:51 PM   #6
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ok dave please feel free to step in here... what i think....is .... swap in an ax-15 and
re gear to 4.88's then run 33's. the tranny is good, the gears are good and the 33's won't kill your axles. if i could re-due it ...well i still would chuck the engine, but anyways. congrats on your gears. have fun!!
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Old 08-11-2008, 05:09 PM   #7
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well, i really dont wheel that much just a couple puddles with dirt in the bottom lol, so i'm not to concerned about the axles yet, just lots of street use, but if i was to upgrade axles, what would be a good upgrade thats cheap?
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Old 08-11-2008, 06:06 PM   #8
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if you wanna run 33's i wouldn't waste time regearing the d35, if you wanna go min. regear the d30 and find a 44 or ford 8.8 out back. both can be found with 4.10 but thats the best gearing i think they came with, not bad gearing for 4.0 but doesn't help you much.

and yj, the only problem i see in your idea is swapping an ax15, i haven't looked into it, but it requires adapters or something cuz the splines are different. that money could be put towards engine upgrade imo. lots of variables in these discussions.
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Old 08-11-2008, 06:16 PM   #9
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so if i'm looking to upgrade the rear axle, i'm looking at the cost of the rear end and then regearing it?
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Old 08-11-2008, 07:34 PM   #10
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unfortanately yes, with the 4 cyl. plus, you can't regear the back and not the front. so you're regearing two axles no matter what, its just a matter of do you wanna spend that money on the d35?

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